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Reviews/Übersichtsartikel in wissenschaftlichen Fachzeitschriften

Jahre: 2008

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2008

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Weidlich A, Veit D
A critical survey of agent-based wholesale electricity market models
2008 Energy Economics, Band: 30, Seiten: 1728 - 1759

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Monographien

Jahre: 2020 | 2015 | 2014 | 2012 | 2011 | 2010 | 2009 | 2008

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2020

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Universität Freiburg, Technische Fakultät
Dissertation "Influence of realistic operation conditions on silicon solar cells and energy yield"
Eberle R.

2015

nach oben zur Jahresübersicht

Reiner-Lemoine-Stiftung
Low-Concentrating, Stationary Solar Thermal Collectors for Process Heat Generation
Hess, S
G Stryi-Hipp, Woodhead, Cambridge
Solar Thermal Technologies for Process Heating
ISBN: 978-1-78242-213-6
Hess S

2014

nach oben zur Jahresübersicht

Numerical sensitivity studies of a UHMWPE composite for ballistic protection
Numerical sensitivity studies of a UHMWPE composite for ballistic protection
LĂ¤ssig T, Riedel W, Heisserer U, Werff H, May M, Hiermaier S
KurzfassungUltra-high molecular weight polyethylene (UHMWPE) has a high potential for ballistic armor applications due to the excellent weight specific strength inherent to this type of material. In this paper, a non-linear orthotropic material model for the UHMWPE, based on the product DYNEEMAÂŽ HB26, is used for assessing the influence of the material properties on the ballistic performance. The model, implemented in the commercial hydrocode ANSYS AUTODYN uses initially linear-orthotropic elasticity, subsequent non-linear strain hardening, multiple stress-based composite failure criteria and post-failure softening. The strength model is coupled with a polynomial equation of state. An experimentally supported material data set for UHMWPE, presented before, is used as a baseline for the numerical studies on high velocity impact. Parameter sensitivities are studied for these impact situations. The numerical predictions are compared to available experimental data over a wide range of impact velocities (1 km/s up to 6 km/s). The objective of this paper is to assess the influence of different material parameters on the predictive capability of high velocity impact simulations and subsequently provide guidelines for the required experimental characterization of UHMWPE under shock loading.

2012

nach oben zur Jahresübersicht

Springer-Verlag
Future Energy Grid: Migrationspfade ins Internet der Energie
Dänekas C, König A, Mayer C, Rohjans S, Bischoff S, Breuer A, Drzisga T, Hecht J, Holtermann M, Luhmann T, Maerten M, Stadler M, Terzidis O, Plöger W, Theisen T, Wortmann F, Weidlich A, Weinmann J, Winter R, Wissing C

2011

nach oben zur Jahresübersicht

Crashverhalten von Polymerwerkstoffen
Crashverhalten von Polymerwerkstoffen
Hiermaier Stefan

2010

nach oben zur Jahresübersicht

Selbstheilende Polymere
Selbstheilende Polymere
Haase T, Thoma K, Hiermaier S

2009

nach oben zur Jahresübersicht

Hypervelocity impact induced shockwaves and related equations of state
Hypervelocity impact induced shockwaves and related equations of state
Hiermaier S
KurzfassungPrecondition for stable shock wave propagation is a convex Equation of State (EoS) in terms of pressure and volume. The first mathematical proof for the existence and dependence of shock waves on that non-linearity was derived by Bethe [1]. In this introductory chapter, a more phenomenological approach to derive conditions for shock wave formation will be given along with some examples for Equations of State used in hydrocodes.
Introduction
Introduction
Hiermaier S
Springer, Berlin
Predictive modeling of dynamic processes : A tribute to Professor Klaus Thoma
ISBN: 978-1-4419-0726-4
Hiermaier, S

2008

nach oben zur Jahresübersicht

Physica-Verlag Springer, Seite: 174
Engineering interrelated electricity markets: an agent-based computational approach
Weidlich A
Springer US, Berlin
Structures under crash and impact : Continuum mechanics, discretization and experimental characterization
ISBN: 978-0-387-73862-8
Hiermaier, S.J.

Buchbeiträge

Jahre: 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2004 | 1998

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2021

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van Dinther C, Flath CM, Gaerttner J, Huber J, Mengelkamp E, Schuller A, Staudt P, Weidlich A
Engineering Energy Markets – The Past, the Present and the Future
In: Market Engineering - Insights from Two Decades of Research on Markets and Information
2021, Springer, Seiten: 113 - 134,
KurzfassungSince the beginning of energy sector liberalization, the design of energy markets has become a prominent field of research. Markets nowadays facilitate efficient resource allocation in many fields of energy system operation, such as plant dispatch, control reserve provisioning, delimitation of related carbon emissions, grid congestion management and, more recently, smart grid concepts and local energy trading. Therefore, good market designs play an important role in enabling the energy transition towards a more sustainable energy supply for all. In this contribution, we retrace how market engineering shaped the development of energy markets, and how the research focus shifted from national wholesale markets towards more decentralized and location-sensitive concepts.

2020

nach oben zur Jahresübersicht

Luderer C., Tutsch L., Messmer M., Bivour M., Hermle M.
Doping Variation at the TCO/a-Si(p) Hole Contact
In: 37th EU PVSEC
2020, Proceedings of the 37th European Photovoltaic Solar Energy Conference and Exhibition, Seite: 493–496,
KurzfassungResistive losses arise at the transport barriers at the interfaces between the different semiconductor materials in the TCO/a-Si/c-Si stack and limit the power output of silicon heterojunction (SHJ) solar cells. A key element is the unisotype recombination junction at the TCO/a-Si(p) interface. We identify sufficient doping on both sides of this junction to be crucial for low contact resistance ( c). For a-Si this is achieved by using a sufficient but not too high doping gas concentration during deposition. On the TCO side high oxygen (O2) gas concentrations during deposition have to be avoided. To combine high transparency of O2-rich TCOs with low c and Rsheet of O2-poor TCOs, we utilize a TCO layer stack. We show that a low O2 content in the vicinity of the TCO/a-Si(p) interface is mandatory to provide efficient tunnelling transport and to avoid resistive losses at the TCO/a-Si(p) interface.
Becker, Denise;, Stemmler, Simon;, Reiterer, Alexander
Entwicklung und Evaluierung eines kompakten Multisensorsystems für den Einsatz auf Drohnen
In: Ingenieurvermessung 20 Beiträge zum 19. Internationalen Ingenieurvermessungskurs München, 2020
2020, Wichmann, Thomas A. Wunderlich, Seiten: 99 - 108, Thomas A. Wunderlich, ISBN: 978-3-87907-672-7
Kwapil W., Dalke J., Niewelt T., Schubert M.
LeTID- and (Extended) BO-Related Degradation and Regeneration in B- and Ga-Doped Monocrystalline Silicon during Dark and Illuminated Anneals
In: 37th EU PVSEC
2020, , Seite: 152–155,
KurzfassungWe study the degradation effects of boron-oxygen related light-induced degradation (LID) and light- and elevated temperature-induced degradation (LeTID) on both B- and Ga-doped Cz-Si wafers from the same industrial producer. The wafers of the two doping types were subjected to the same sample processing and degradation conditions. The studied conditions include dark anneal (DA) at 175°C and illuminated anneals at 75°C and either 1 or 0.1 sun eq. illumination intensity, which allow a good direct comparison of the influence of the dopant elements on the degradation effects. We find an atypical injection dependence of LeTID in the Ga-doped samples compared to the “standard” behavior in B-doped silicon. The Ga-doped samples degrade strongly only when the carrier injection is low. Degradation of Ga-doped samples during DA is only observed on long timescales, resulting in an injection-dependent lifetime dissimilar to LeTID-degraded Ga-doped samples and B-doped samples after both DA and LeTID. The results indicate that the dopants have a strong influence on the degradation behavior.
Kwapil W., Dalke J., Niewelt T., Schubert M.
LeTID- and (Extended) BO-Related Degradation and Regeneration in B- and Ga-Doped Monocrystalline Silicon during Dark and Illuminated Anneals
In: 37th EU PVSEC
2020, , Seite: 152–155,
KurzfassungWe study the degradation effects of boron-oxygen related light-induced degradation (LID) and light- and elevated temperature-induced degradation (LeTID) on both B- and Ga-doped Cz-Si wafers from the same industrial producer. The wafers of the two doping types were subjected to the same sample processing and degradation conditions. The studied conditions include dark anneal (DA) at 175°C and illuminated anneals at 75°C and either 1 or 0.1 sun eq. illumination intensity, which allow a good direct comparison of the influence of the dopant elements on the degradation effects. We find an atypical injection dependence of LeTID in the Ga-doped samples compared to the “standard” behavior in B-doped silicon. The Ga-doped samples degrade strongly only when the carrier injection is low. Degradation of Ga-doped samples during DA is only observed on long timescales, resulting in an injection-dependent lifetime dissimilar to LeTID-degraded Ga-doped samples and B-doped samples after both DA and LeTID. The results indicate that the dopants have a strong influence on the degradation behavior.
Kwapil W., Dalke J., Niewelt T., Schubert M.
LeTID- and (Extended) BO-Related Degradation and Regeneration in B- and Ga-Doped Monocrystalline Silicon during Dark and Illuminated Anneals
In: 37th EU PVSEC
2020, , Seite: 152–155,
KurzfassungWe study the degradation effects of boron-oxygen related light-induced degradation (LID) and light- and elevated temperature-induced degradation (LeTID) on both B- and Ga-doped Cz-Si wafers from the same industrial producer. The wafers of the two doping types were subjected to the same sample processing and degradation conditions. The studied conditions include dark anneal (DA) at 175°C and illuminated anneals at 75°C and either 1 or 0.1 sun eq. illumination intensity, which allow a good direct comparison of the influence of the dopant elements on the degradation effects. We find an atypical injection dependence of LeTID in the Ga-doped samples compared to the “standard” behavior in B-doped silicon. The Ga-doped samples degrade strongly only when the carrier injection is low. Degradation of Ga-doped samples during DA is only observed on long timescales, resulting in an injection-dependent lifetime dissimilar to LeTID-degraded Ga-doped samples and B-doped samples after both DA and LeTID. The results indicate that the dopants have a strong influence on the degradation behavior.
Kwapil W, Niewelt T, Schubert M, Dalke, J
LeTID- and (Extended) BO-Related Degradation and Regeneration in B- and Ga-Doped Monocrystalline Silicon during Dark and Illuminated Anneals
In: 37th EU PVSEC
2020, Dalke et al., Seite: 152–155,
KurzfassungWe study the degradation effects of boron-oxygen related light-induced degradation (LID) and light- and elevated temperature-induced degradation (LeTID) on both B- and Ga-doped Cz-Si wafers from the same industrial producer. The wafers of the two doping types were subjected to the same sample processing and degradation conditions. The studied conditions include dark anneal (DA) at 175°C and illuminated anneals at 75°C and either 1 or 0.1 sun eq. illumination intensity, which allow a good direct comparison of the influence of the dopant elements on the degradation effects. We find an atypical injection dependence of LeTID in the Ga-doped samples compared to the “standard” behavior in B-doped silicon. The Ga-doped samples degrade strongly only when the carrier injection is low. Degradation of Ga-doped samples during DA is only observed on long timescales, resulting in an injection-dependent lifetime dissimilar to LeTID-degraded Ga-doped samples and B-doped samples after both DA and LeTID. The results indicate that the dopants have a strong influence on the degradation behavior.
Kwapil W., Dalke J., Niewelt T., Schubert M.
LeTID- and (Extended) BO-Related Degradation and Regeneration in B- and Ga-Doped Monocrystalline Silicon during Dark and Illuminated Anneals
In: 37th EU PVSEC
2020, , Seite: 152–155,
KurzfassungWe study the degradation effects of boron-oxygen related light-induced degradation (LID) and light- and elevated temperature-induced degradation (LeTID) on both B- and Ga-doped Cz-Si wafers from the same industrial producer. The wafers of the two doping types were subjected to the same sample processing and degradation conditions. The studied conditions include dark anneal (DA) at 175°C and illuminated anneals at 75°C and either 1 or 0.1 sun eq. illumination intensity, which allow a good direct comparison of the influence of the dopant elements on the degradation effects. We find an atypical injection dependence of LeTID in the Ga-doped samples compared to the “standard” behavior in B-doped silicon. The Ga-doped samples degrade strongly only when the carrier injection is low. Degradation of Ga-doped samples during DA is only observed on long timescales, resulting in an injection-dependent lifetime dissimilar to LeTID-degraded Ga-doped samples and B-doped samples after both DA and LeTID. The results indicate that the dopants have a strong influence on the degradation behavior.
Schäfer M, Tranberg B, Greiner M
Power flows in complex renewable energy networks
In: Discoveries at the Frontiers of Science
2020, Springer, Seiten: 239 - 251,
Reiterer, Alexander, Störk, Dominik, Wäschle, Katharina, Leydecker, Achim
Vollautomatisierte Auswertung von Mobile-Mapping-Daten mithilfe von Machine Learning
In: Ingenieurvermessung 20 Beiträge zum 19. Internationalen Ingenieurvermessungskurs München, 2020
2020, Wichmann, Thomas A. Wunderlich, Seiten: 141 - 147, Thomas A. Wunderlich, ISBN: 978-3-87907-672-7

2019

nach oben zur Jahresübersicht

Hiermaier, Stefan, Scharte, Benjamin, Fischer, Kai
Resilience Engineering: Chances and challenges for a comprehensive concept
In: Handbook on resilience of socio-technical systems
2019, Cheltenham: Elgar, 2019, Ruth, Matthias, Seiten: 155 - 166, Ruth, Matthias, ISBN: 978-1-78643-936-9
KurzfassungEver more complex socio-technical systems enable modern societies to profit from most technological developments in everyday life. New means of communication and transport, cheap energy and supply goods as well as stable global business opportunities are the basis for the comfortable environment many modern civilizations have to offer. The related technological innovations involve manifold interdependencies and complexities in the system behavior never known before. As a consequence, safe operation of critical infrastructure and secure environment for societies have to face a new quality of challenges demanding for new approaches in safety and security research.

2018

nach oben zur Jahresübersicht

F. Balle, D. Backe
Very High Cycle Fatigue of Carbon Fiber Reinforced Polyphenylene Sulfide at Ultrasonic Frequencies
In: Fatigue of Materials at Very High Numbers of Loading Cycles
2018, Springer Spektrum, H.-J. Christ, Seiten: 441 - 461, H.-J. Christ,

2017

nach oben zur Jahresübersicht

Reiterer, A., Predehl, K., Leidinger, M.
Die Entwicklung von Laserscannern - Herausforderungen bei neuartigen Anwendungen
In: Terrestrisches Laserscanning 2017 (TLS 2017) Beiträge zum 165. DVW-Seminar am 11. und 12. Dezember 2017 in Fulda
2017, Wißner-Verlag, DVW - Gesellschaft für Geodäsie, Geoinformation und Landmanagement e.V., Seiten: 9 - 21, DVW - Gesellschaft für Geodäsie, Geoinformation und Landmanagement e.V., ISBN: 9783957861450
Schäfer M, Hempel S, Tranberg B, Hörsch J, Schramm S, Greiner M
Power Flow Tracing in Complex Networks
In: New Horizons in Fundamental Physics
2017, Springer International Publishing, Seiten: 357 - 373,
KurzfassungThe increasing share of decentralized renewable power generation represents a challenge to the current and future energy system. Providing a geographical smoothing effect, long-range power transmission plays a key role for the system integration of these fluctuating resources. However, the build-up and operation of the necessary network infrastructure incur costs which have to be allocated to the users of the system. Flow tracing techniques, which attribute the power flow on a transmission line to the geographical location of its generation and consumption, represent a valuable tool set to design fair usage and thus cost allocation schemes for transmission investments. In this article, we introduce a general formulation of the flow tracing method and apply it to a simplified model of a highly renewable European electricity system. We review a statistical usage measure which allows to integrate network usage information for longer time series, and illustrate this measure using an analytical test case.

2016

nach oben zur Jahresübersicht

Haering, Ivo, Scharte, Benjamin, Stolz, Alexander, Leismann, Tobias, Hiermaier, Stefan
Resilience engineering and quantification for sustainable systems development and assessment: Socio-technical systems and critical infrastructure
In: IRGC Resource Guide on Resilience. Online resource
2016, IRGC Resource Guide on Resilience. Online resource, Online im WWW, Seite: 9, Online im WWW,

2015

nach oben zur Jahresübersicht

Helmke, A, Hess, S
Classification of Solar Process Heat System Concepts
In: Integration Guideline - Guideline for Solar Planners, Energy Consultants and Process Engineers
2015, B Mus-ter, Seiten: 61 - 76,

2014

nach oben zur Jahresübersicht

Glunz S
Crystalline silicon solar cells with high efficiency
In: Advanced concepts in photovoltaics
2014, Cambridge and United Kingdom The Royal Society of Chemistry, Band: 11, Seiten: 1 - 29,
Reiterer, A.
Erfassung großer Bereiche mit 3D-Laserscanning
In: Leitfaden zur optischen 3D-Messtechnik (Fraunhofer Vision Leitfaden-Reihe Band 14)
2014, Fraunhofer,
Laessig, T., Riedel, W., Heisserer, U., Werff, H. van der, May, M., Hiermaier, S.
Numerical sensitivity studies of a UHMWPE composite for ballistic protection
In: Structures under shock and impact
2014, Structures under shock and impact, WIT Press, Southampton, Seiten: 371 - 381, WIT Press, Southampton, ISBN: 978-1-84564-796-4
KurzfassungUltra-high molecular weight polyethylene (UHMWPE) has a high potential for ballistic armor applications due to the excellent weight specific strength inherent to this type of material. In this paper, a non-linear orthotropic material model for the UHMWPE, based on the product DYNEEMA� HB26, is used for assessing the influence of the material properties on the ballistic performance. The model, implemented in the commercial hydrocode ANSYS AUTODYN uses initially linear-orthotropic elasticity, subsequent non-linear strain hardening, multiple stress-based composite failure criteria and post-failure softening. The strength model is coupled with a polynomial equation of state. An experimentally supported material data set for UHMWPE, presented before, is used as a baseline for the numerical studies on high velocity impact. Parameter sensitivities are studied for these impact situations. The numerical predictions are compared to available experimental data over a wide range of impact velocities (1 km/s up to 6 km/s). The objective of this paper is to assess the influence of different material parameters on the predictive capability of high velocity impact simulations and subsequently provide guidelines for the required experimental characterization of UHMWPE under shock loading.

2012

nach oben zur Jahresübersicht

Glunz, SW, Preu, R., Biro, D.
Crystalline silicon solar cells: state-of-the-art and future developments
In: Comprehensive renewable energy, Vol. 1
2012, Elsevier, Sayigh, A., Seiten: 353 - 387, Sayigh, A.,
Weidlich A, Vogt H, Krauss W, Spiess P, Jawurek M, Johns M, Karnouskos S
Decentralized intelligence in energy efficient power systems
In: Handbook of Networks in Power Systems I
2012, Handbook of Networks in Power Systems I, Seiten: 467 - 486,
Hess, S, Lauterbach, C, Schmitt, B
Solare Prozesswärme
In: Solarthermische Anlagen: Leit-faden für das SHK-, Elektro- und Dachdeckerhandwerk, Fachplaner, Architekten, Bauherren und Weiterbildungsinstitutionen
2012, Kasper, B-R & Weyers-Borchert B,, Deutsche Gesellschaft für Sonnenenergie, Deutsche Gesellschaft für Sonnenenergie,

2011

nach oben zur Jahresübersicht

Hiermaier, Stefan
Crashverhalten von Polymerwerkstoffen
In: Handbuch Leichtbau
2011, Handbuch Leichtbau, Hanser, Muenchen, Hanser, Muenchen, ISBN: 978-3-446-42267-4
Karnouskos S, Weidlich A, Ringelstein J, Dimeas A, Kok K, Warmer C, Selzam, Patrick, Drenkard, Stefan, Hatziargyriou, Nikos, Lioliou, Vally
Monitoring and control for energy efficiency in the smart house
In: Energy Efficient Computing and Networking, Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 54(3)
2011, Springer, Seiten: 197 - 207,

2010

nach oben zur Jahresübersicht

Haase, T., Thoma, K., Hiermaier, S.
Selbstheilende Polymere
In: Festschrift zum 60. Geburtstag von Univ.-Prof. Dr.-Ing. Ingbert Mangerig
2010, Festschrift zum 60. Geburtstag von Univ.-Prof. Dr.-Ing. Ingbert Mangerig, Universit�t der Bundeswehr Muenchen, Institut fuer Mechanik und Statik, Neubiberg, Universit�t der Bundeswehr Muenchen, Institut fuer Mechanik und Statik, Neubiberg,

2009

nach oben zur Jahresübersicht

Hiermaier, S.
Hypervelocity impact induced shockwaves and related equations of state
In: Predictive modeling of dynamic processes
2009, Predictive modeling of dynamic processes, Springer, Berlin, Seiten: 333 - 348, Springer, Berlin, ISBN: 978-1-4419-0726-4
KurzfassungPrecondition for stable shock wave propagation is a convex Equation of State (EoS) in terms of pressure and volume. The first mathematical proof for the existence and dependence of shock waves on that non-linearity was derived by Bethe [1]. In this introductory chapter,
Hiermaier S
Predictive modeling of dynamic processes
2009, Springer, Berlin, ISBN: 978-1-4419-0726-4 and 978-1-4419-0727-1

2008

nach oben zur Jahresübersicht

Hiermaier S
Structures under crash and impact
2008, Springer US, Berlin, ISBN: 978-0-387-73862-8 and 0-387-73862-2
Weidlich A, Sensfuß F, Genoese M, Veit D
Studying the effects of CO2 emissions trading on the electricity market: A multi-agent-based approach
In: Emissions Trading - Institutional Design, Decision Making and Corporate Strategies
2008, Physica-Verlag Springer, Seiten: 91 - 101,

2007

nach oben zur Jahresübersicht

Veit D, Weidlich A
Preissegmentierung im deutschen Strommarkt -- Ein interaktives Pricing-Konzept im Retail-Markt
In: Interactive Marketing im Web 2.0+
2007, Vahlen, Seiten: 165 - 180,

2004

nach oben zur Jahresübersicht

Paar, G., Huber, N. B., Bauer, A., Avian, M., Reiterer, A
Vision-Based Terrestrial Surface Monitoring
In: Terrigenous Mass Movements
2004, Springer Verlag, Springer Berlin Heidelberg, Seiten: 283 - 348, Springer Berlin Heidelberg, ISBN: 978-3-642-25494-9

1998

nach oben zur Jahresübersicht

Rein S, Diez S, Falster R, Glunz Stefan
Quantitative correlation of the metastable defect in Cz-silicon with different impurities
In: Scanning electron microscopy - physics of image formation and microanalysis
1998, Berlin Heidelberg New York Tokyo Springer-Verlag GmbH, Seiten: 1048 - 1052,

Vorträge

Jahre: 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004

zurück zur Übersicht aller Publikationen

2019

nach oben zur Jahresübersicht

M. Becker, F. Balle
Multi-spot ultrasonic welding of Al/Steel-joints for automotive applications
2019 International Congress on Ultrasonics, Brügge
F. Staab, F. Balle
Ultrasonic welding of ageing resistant hybrid transition structures for future aircraft applications
2019 International Congress on Ultrasonics, Brügge
S. Backe, T. Beck, F. Balle
SHORT-TIME APPROACH FOR FATIGUE LIFE ESTIMATION OF MULTIFUNCTIONAL COMPOSITES
2019 ICCM22, Melbourne Australia

Datei herunterladen
F. Staab, F. Balle
Mikrostruktur- und Eigenschaftsanalyse ultraschalltorsionsgeschweißter Al/CFK-Verbunde
2019 Symposium Verbundwerkstoffe und Werkstoffverbunde, Kaiserslautern
M. Becker
Serielles Ultraschallpunktschweißen von Aluminium/Stahl-Verbunden
2019 Symposium Verbundwerkstoffe und Werkstoffverbunde, Kaiserslautern
M. Becker, F. Balle
Serielles Ultraschallpunktschweißen von Aluminium/Stahl-Verbunden
2019 22. Symposiums für Verbundwerkstoffe und Werkstoffverbunde

2018

nach oben zur Jahresübersicht

M. Becker
Untersuchungen zum seriellen Ultraschallpunktschweißen von Aluminium/Stahl-Verbunden
2018 DGM Fachausschuss Hybride Werkstoffe und Strukturen zusammen mit dem Arbeitskreis Mischverbindungen mit Aluminium des Fachausschusses Aluminium, Kaiserslautern
Unnewehr J, Waldl H-P, Pahlke P, Herráez I
Reducing operational costs of offshore HVDC energy export systems through optimized maintenance
2018 17th Wind Integration Workshop
F. Staab, F. Balle
Ultraschalltorsionsschweißen von alterungsbeständigen Al/CFK-Verbunden – Konzepte, Prozess und Eigenschaften
2018 3. Hybrid Materials and Structures, Bremen
F. Staab, F. Balle
Prozessuntersuchungen zum Ultraschallschweißen von alterungsbeständigen Al/CFK-Übergangsstrukturen
2018 DGM-Fachausschuss „Hybride Werkstoffe und Strukturen", Dortmund
Laessig, Torsten, Bagusat, Frank, Pfändler, Siegfried, May, Michael, Riedel, Werner, Heisserer, Ulrich, Werff, Harm van der, Sauer, Martin, Hiermaier, Stefan
Influence of the consolidation pressure on the shock wave propagation in UHMWPE composites
2018 1st World Conference on Advanced Materials for Defense (AuxDefense 2018), Lisbon, Portugal, September 3 and 4, 2018

2017

nach oben zur Jahresübersicht

F. Staab, F. Balle, J. Born
Ultraschalltorsionsschweißen von alterungsbeständigen Al/CFK-Verbunden – Prozess-, Mikrostruktur- und Eigenschaftsanalyse
2017 21. Symposium Verbundwerkstoffe und Werkstoffverbunde, Bremen
F. Staab, F. Balle
Ultraschalltorsionsschweißen von alterungsbeständigen Al/CFK-Verbunden: Konzepte, Herstellung und Eigenschaften
2017 DGM-Fachausschuss „Hybride Werkstoffe und Strukturen", Clausthal-Zellerfeld

2016

nach oben zur Jahresübersicht

F. Staab, F. Balle, J. Born
Joining of Light Metals to Fiber Reinforced Thermoplastic Composites by Power Ultrasonics for the Application in Hybrid Aircraft Structures
2016 3rd International Conference and Exhibition on Thermoplastic Composites (ITHEC), Bremen
Künzel T, Klumpp F, Weidlich A, Stuible A
Flexibility Options for Integrating Renewable Energy and Grid Stability
2016 10th International Renewable Energy Storage Conference IRES, Düsseldorf

2015

nach oben zur Jahresübersicht

Reiterer, A.
Mobiles Laserscanning – Aktuelle Trends
2015 TLS 2015, Fulda
Künzel T, Weidlich A
ÖkoFlex - Flexibility as an economic commodity in the intelligent energy system for the efficient integration of renewable energies
2015 Science Technology Conference, Karlsruhe

2014

nach oben zur Jahresübersicht

Reiterer, A.
Development and Evaluation of a Lightweight Laser Scanning System for Small UAVs
2014 SPAR, Amsterdam
Reiterer, A.
Laserscanning – Ein Überblick
2014 AKG User Conference, Köln

2013

nach oben zur Jahresübersicht

Reiterer, A.
Ein neuartiges Konzept auf der Basis von Laser Scanning Technologie zur Querebenheitsmessung von Straßenoberflächen
2013 BAUSCAN, Magdeburg
Reiterer, A.
Fast and Reliable Pavement Profile Scanning
2013 SPAR, Amsterdam

2012

nach oben zur Jahresübersicht

Weidlich A
Challenges for the Market Integration of Renewables with Smart Grids
2012 IEEE PES Innovative Smart Grid Technologies (ISGT) Europe Conference, Berlin

2011

nach oben zur Jahresübersicht

Reiterer, A.
Aufgaben, Trend und Perspektiven in der Ingenieurgeodäsie und geodätischen Messtechnik
2011 Interne Seminarreihe, Technische Universität Graz
Reiterer, A.
Issues, Trends and Perspectives in Engineering Geodesy
2011 Geosensorics and Engineering Geodesy, ETH-Zürich
Reiterer, A.
Monitoring von natürlichen Objekten – Strategien und Techniken zur Automatisierung. Hangbewegungen – Moderne Fernerkundungs- und Datenanalysemethoden
2011 Workshop am Lehrstuhl für Ingenieurgeologie der Technischen Universität München

2010

nach oben zur Jahresübersicht

Reiterer, A.
Anwendungen bildgebender Tachymeter
2010 Gesellschaft zur Kalibrierung geodätischer Messmittel, Leica Geosystems, Heerbrugg
Reiterer, A.
Image-Based Total Stations – A Novel Sensor for Geosciences
2010 ESF Topo- Europe Summer School on Detecting Landscape Change, Loen, Norwegen
Reiterer, A.
Intelligentes Geo-Monitoring in der Ingenieurgeodäsie
2010 DVW-Vortrag, TU-München

2009

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Reiterer, A.
Bildgestützte / intelligente Erfassung von Deformationen in der Ingenieurgeodäsie
2009 Interner Seminarvortrag, Hannover
Reiterer, A.
Intelligente bildgebende Sensorik im Anwendungsbereich der Ingenieurgeodäsie
2009 DVW-Vortrag, Darmstadt
Reiterer, A.
i-MeaS – Konzept und Realisierung eines intelligenten bildgestützten Monitoring Systems
2009 DVW-Vortrag, Braunschweig

2008

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Reiterer, A.
Deformation Measurement by Image-Assisted Total Station – State of the Art and Future Developments
2008 Technologieforum Leica Geosystems, Heerbrugg

2007

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Reiterer, A.
Intelligente Steuerung bildgebender Sensoren in der Ingenieurgeodäsie
2007 Verleihung des Karl-Rinner-Preises, Graz

2006

nach oben zur Jahresübersicht

Reiterer, A.
Anwendungen der Künstlichen Intelligenz für die Ingenieurgeodäsie
2006 9. Österreichischer Geodätentag, Krems an der Donau
Reiterer, A.
Smart Image-Based Sensors – Overview and Outlook
2006 Technologieforum Leica Geosystems, Heerbrugg

2005

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Reiterer, A.
New Methods for Image-Based Point Detection
2005 Institute of Geodesy and Photogrammetry, ETH-Zürich

2004

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Reiterer, A.
Ein wissensbasiertes Entscheidungssystem für ein online Multisensor System
2004 BRIMOS-Workshop, Universität für Bodenkultur, Wien

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2021

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Rathmann, Lars, Geissler, Joschka, Reiterer, Alexander
Concept for a novel airborne LiDAR system combining high-resolution snow height mapping with coregistered spatial information on the water content of the snowpack
2021 SPIE Optical Metrology, 2021 , Band: 11785, 1178513
KurzfassungThe impact of climate change on snow cover evolution is evident. Increasing amounts of winter precipitation as well as rising temperatures are causing the winter snow cover to change more and more rapidly within one season. To quantify the direct eﬀects on hydrological cycles, spatially and temporally high-resolution information on snow height and the amount of water stored as snow (Snow Water Equivalent, SWE) is required on watershed scales. This paper presents the concept for a novel airborne light detection and ranging (LiDAR) system combining high-resolution snow height mapping with co-registered spatial information on the water content of the snowpack. Based on the optical characteristics of snow, we outline a detailed plan for dual-wavelength LiDAR sensor working at wavelengths of 1030 nm and 515 nm. By comparing the intensities received in the two channels, snow cover parameters like the eﬀective grain size can be inferred. By means of recent snow hydrological models, from these data and the topographic snow depth maps then high resolution SWE maps can be deduced. We supplement our outline with conceptual LiDAR snow depth and reﬂectance measurements using a commercially available system, pointing out the impact of view angle dependence of received intensity and general applicability for future airborne LiDAR surveys.
Stemmler, Simon
Development of a high-speed, high-resolution multispectral camera system for airborne applications
2021 , Band: 11785 1178512-1
KurzfassungFor decades, satellite and aerial imagery have been the central element of mapping the earth's surface. The need for fast and frequent imaging, especially of smaller areas with unmanned aerial vehicles (UAVs) is gaining importance in various industries. Regular monitoring of agricultural areas, forests, coastal regions and urban areas are of utmost interest. Using UAVs to examine the worlds surface allows high resolution imagery captured in short time intervals without high costs as with the use of airplanes. This time series monitoring allows a quick detection of changes in the study area. The Fraunhofer-Institute for Physical Measurement Techniques IPM presents a compact and lightweight multispectral camera system. A 12 MP RGB-sensor and two 5.5 MP grayscale sensors are simultaneously capturing images. High frame rates, ultra-lightweight design, and the ability to easily adjust the aperture angle and wavelengths to be recorded open up many new applications. This ensures the use on a wide range of UAVs. Even with fast flying fixed wing UAVs, images can be acquired with high overlap. Further, we present results of a first measurement campaign.
Merkle, Dominik, Reiterer, Alexander
Evaluation of thermography-based automated delamination and cavity detection in concrete bridges
2021 SPIE Optical Metrology, 2021
KurzfassungThe stability, durability, and safety of concrete bridges are not only endangered by visible damages on the surface such as cracks or spalling, but also internal damages such as cavities, delamination, or material changes due to carbonation or moisture penetration. In Germany, the inspection is regulated by the norm DIN 1076. Accordingly, the inspectors with an experienced hearing still interpret the sound of a hammer on the entire underside of the bridge. Therefore, to inspect the underside of a bridge with its underlying infrastructures like traﬃc, water, or railroads and its usually complex and diﬃcult to reach structures, including girders, a fast and reliable remote sensing approach is required to increase both eﬃciency and level of automation. This paper summarizes recent work using both passive and active thermography for bridge inspection. We compare three diﬀerent sensor systems including the Parrot Anaﬁ Thermal, the FLIR Vue Pro R, and the FLIR SC640 which could be used in a UAV, UGV, or human based inspection. To test and verify our concepts, we apply passive thermography on real concrete bridges in Freiburg (Germany) and derive 2D and 3D data using a photogrammetric approach. We analyse spatial and thermal resolution dependent on camera selection, working distance, weather conditions, and the bridges’ surface properties. For damage detection, we use high-pass or low-pass ﬁltering dependent on the ambient temperature gradient. Moreover, we discuss further damage detection methods that could be integrated into the proposed processing workﬂow.
Olshausen, Philipp, Roetner, Moritz, Koch, Christian, Reiterer, Alexander
Multimodal measurement system for road analysis and surveying of road surroundings
2021 SPIE Optical Metrology, 2021 Jürgen Beyerer, Michael Heizmann, Band: 11787 1178709-1
KurzfassungIdentification and documentation of the state of road infrastructure are rapidly gaining in importance due to increased traffic. This requires regular inspection in order to optimize maintenance efforts. Additionally, construction projects are getting more complex and demand digital planning and building processes. The data, which forms the basis for these processes, must be rapidly acquired and it must be digital. In this paper, a measurement vehicle is presented that efficiently collects all desired data. The vehicle is based on a modular system platform from the Fraunhofer-Institute for Physical Measurement Techniques IPM. It enables measurements for road analysis while driving with up to 80 km/h. Four lasers quantify the longitudinal evenness of the road with submillimetre precision and kHz temporal resolution. A pavement profile scanner built by Fraunhofer IPM is used to measure the transverse evenness of the road with millimetre precision and a 2 MHz sampling rate. Two cameras and an illumination system provide continuous high-resolution and high-contrast images of the road surface for the quantification of the road condition. Furthermore, additional instruments are mounted for the surveying of road surroundings. A clearance profile scanner built by Fraunhofer IPM scans a 345° area perpendicular to the driving direction and delivers 3D data with millimetre precision. Four cameras acquire high-resolution images of the surrounding in all directions. In combination with a sophisticated post-processing pipeline, which extracts semantically segmented information from the images, this yields a digital, semantically interpreted representation of the mapped urban area.
A. Premanand, F. Balle
Development of ultrasonic fatigue system for testing hybrid materials
2021 FMF Jahresbericht 2020
F. Balle, B. Khatri
Hybrid multifunctional composites (MCFRP): Metal and carbon fibers united!
2021 FMF Jahresbericht 2020, Freiburger Materialforschungszentrum
Abunofal M, Poshiya N, Qussous R, Weidlich A
Comparative Analysis of Electricity Market Prices Based on Different Forecasting Methods
2021 IEEE Madrid PowerTech, Band: 2021

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2020

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Unnewehr J
Tracking CO2 emissions from power generation in high spatial and temporal resolution – Case study for the German electricity system
2020 Energy Informatics, Band: 3
KurzfassungUntil today it is not possible to allocate the CO2 emissions in the German electricity system to a specific region and its corresponding electricity demand that caused them. This paper presents a new energy system model and uses established methods for answering this question. A detailed bottom-up model of the German electricity system is built to represent a highly spatial and temporal representation of the Germany electricity system in 2019. In combination with a customized input-output analysis, the individual emissions from the producer to the caused consumer can be traced. The analysis demonstrates the importance of considering spatial and temporal effects as well as electricity exchanges between regions in estimating emissions footprints.
Merkle, Dominik, Schmitt, Annette, Reiterer, Alexander
Concept of an autonomous mobile robotic system for bridge inspection
2020 Conference "Remote Sensing Technologies and Applications in Urban Environments" <5, 2020 SPIE, SPIE, 2020 (Proceedings of SPIE 11535) Paper 115350A
KurzfassungFraunhofer-Gesellschaft Concept of an autonomous mobile robotic system for bridge inspection Autor(en): Merkle, Dominik; Schmitt, Annette; Reiterer, Alexander Zugang: Postprint urn:nbn:de:0011-n-6032527 (17 MByte PDF) MD5 Fingerprint: 5cbbff9ccf7e32d405c888142f2850d4 Copyright Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. Erstellt am: 9.10.2020 DOI: 10.1117/12.2570633 [Titel anhand dieser DOI in Citavi-Projekt übernehmen] Quelle Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.: Remote Sensing Technologies and Applications in Urban Environments V : 21-25 September 2020, Online Only Bellingham, WA: SPIE, 2020 (Proceedings of SPIE 11535) Paper 115350A, 16 S. Konferenz Conference "Remote Sensing Technologies and Applications in Urban Environments" <5, 2020, Online> Sprache Englisch Dokumentart Konferenzbeitrag, Elektronische Publikation Fraunhofer Institut Fraunhofer IPM (Institutshomepage) Schlagwörter mobile mapping; LiDAR; bridge inspection; sensor system; mobile robot Abstract In the next decade, many old bridges will be exposed to increasing traffic loads and destructive environmental conditions. Measurement methods like laser scanning, infrared thermography, photogrammetry, ground penetrating radar, or ultrasonic scanning are used on single robotic systems to partially support the inspectors. However, time-consuming manual inspections for crack detection, measurement, and documentation are still necessary. This paper describes the concept of an autonomous mobile robotic bridge inspection system. The proposed concept for an unmanned ground vehicle (UGV) is achieved by a trade-off of different mobile platforms, sensor systems for mapping, localization and inspection, and fist tests assessing the feasibility. We use a small concrete bridge in Freiburg (Germany) with various cracks for testing the sensors, the UGV concept, and initial tests of the mobile platform. This results in the choice of selecting the weatherproof version of the mobile robotic platform Husky from Clearpath Robotics. It is equipped with Swift Navigation's Duro real-time kinematic (RTK) system, a heading system, an inertial measurement unit (IMU), a base station, and software for semi-autonomous navigation. In the next step, we compare different sensor systems. For mapping and localization, we decide to use the 360 spherical camera Ladybug 5+ from FLIR Systems and a Velodyne VLP-16 light detection and ranging (LiDAR). High-resolution cameras allow recording damages on the bridge's surface. We perform first tests using monochrome and colour cameras. After evaluating different sensor integration concepts, we present a preliminary design of the UGV including integrated sensors.

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D. Merkle;, A. Schmitt;, A. Reiterer
SENSOR EVALUATION FOR CRACK DETECTION IN CONCRETE BRIDGES
2020 Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., Seiten: 1107 - 1114
KurzfassungBridges are one of the most critical traffic infrastructure objects, therefore it is necessary to monitor them at regular intervals. Nowadays, this monitoring is made manually by visual inspection. In recent projects, the authors are developing automated crack detection systems to support the inspector. In this pre-study, different sensors, like different camera systems for photogrammetry, a laser scanner, and a laser triangulation system are evaluated for crack detection based on a defined required minimum crack width of 0.2 mm. The used test object is a blasted concrete plate, sized 70 cm × 70 cm × 5 cm and placed in an outdoor environment. The results of the data acquisition with the different sensors are point clouds, which make the results comparable. The point cloud from the chosen laser scanner is not sufficient for the required crack width even at a low speed of 1 m/s. The RGB or intensity information of the photogrammetric point clouds, even based on a low-cost smartphone camera, contain the targeted cracks. The authors advise against using only the 3D information of the photogrammetric point clouds for crack detection due to noise. The laser triangulation system delivers the best results in both intensity and 3D information. The low weight of camera systems makes photogrammetry to the preferred method for an unmanned aerial vehicle (UAV). In the future, the authors aim for crack detection based on the 2D images, automated by using machine learning, and crack localisation by using structure from motion (SfM) or a positioning system.

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Negassi M.,, Parupalli U.,, Suarez-Ibarrola R.,, Schmitt A.,, Hein S.,, Miernik A.,, Reiterer A.
3D-Reconstruction and Semantic Segmentation of Cystoscopic Images
2020 MICAD2020; Oxford, UK

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Post Regina, Niewelt Tim, Kwapil Wolfram, Schubert Martin C.
Assessment of Influencing Factors on Lifetime-Based Defect Analysis
2020 37th EU PVSEC , Seiten: 332 - 335
KurzfassungSince most detection methods are not sensitive enough to detect and characterize recombination active defects in silicon lifetime spectroscopy is an important method in silicon photovoltaics. It is a powerful tool, that can determine the defect parameters Et and k via the analysis of defect parameter solution surfaces. But despite being a crucial method there is no convention for the assessment of uncertainties. This work lines out a possible way to characterize the uncertainty of the method by a simulation of statistical noise onto lifetime curves following the Shockley-Read-Hall-statistics. The uncertainty analysis is done for one exemplary set of defect parameters. It outlines how prone to wrongful parametrization this method can be, if not conducted with great care. Thereby the suggested approach can act as a tool to decrease the uncertainty of the method by understanding, which influences are most crucial to control.
Eberle R., Fell A., Schindler F., Schubert M.C.
Breakdown of Temperature Sensitivity of Silicon Solar Cells by Simulation Input Parameters
2020 SiliconPV
Luderer, C., Tutsch, L., Messmer, M., Bivour, M., Hermle, M.
Doping Variation at the TCO/a-Si(p) Hole Contact
2020 37th EU PVSEC , Seiten: 493 - 496
KurzfassungResistive losses arise at the transport barriers at the interfaces between the different semiconductor materials in the TCO/a-Si/c-Si stack and limit the power output of silicon heterojunction (SHJ) solar cells. A key element is the unisotype recombination junction at the TCO/a-Si(p) interface. We identify sufficient doping on both sides of this junction to be crucial for low contact resistance ( c). For a-Si this is achieved by using a sufficient but not too high doping gas concentration during deposition. On the TCO side high oxygen (O2) gas concentrations during deposition have to be avoided. To combine high transparency of O2-rich TCOs with low c and Rsheet of O2-poor TCOs, we utilize a TCO layer stack. We show that a low O2 content in the vicinity of the TCO/a-Si(p) interface is mandatory to provide efficient tunnelling transport and to avoid resistive losses at the TCO/a-Si(p) interface.
Heimsath A, Sutardhio C, Schöttl P, Nitz P
Soiling of Solar Mirrors - Impact of Incidence Angles on CSP Plant Performance
2020 25th Solar Power And Chemical Energy Systems International Symposium SolarPACES 2019 25th Solar Power And Chemical Energy Systems International Symposium SolarPACES, Band: 1

2019

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Stemmler, Simon;, Werner, Christoph;, Reiterer, Alexander
Development of a time-of-flight laser scanning system for underwater applications
2019 SPIE Remote Sensing, 2019, Strasbourg, France Charles R. Bostater, Xavier Neyt, Françoise Viallefont-Robinet, Band: 11150 111500M-1
KurzfassungAn increasing number of underwater construction projects demand a solution for precise and highly resolved infrastructure monitoring which cannot be addressed by conventional sonar systems. We present an optical ranging system based on the pulsed time-of-ﬂight method incorporating a signal-processing toolchain especially equipped for mapping technical infrastructure. This allows us to handle multiple returns from objects which are only separated by a 15 cm gap. A high lateral resolution of 4 mm in combination with a high measurement rate of 50 000 measurements per second allows the reconstruction of ﬁne details. The measurement range can reach several 10 m, depending on the water quality. Further, we present the system design of our scanner and discuss ﬁrst results obtained in an underwater measurement range.
D. Weibel, T. Beck, F. Balle
Fatigue properties and damage of CF-PPS from high to very high cycles
2019 ICCM22, Melbourne Australia

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Eberle R., Fell A., Richter A., Niewelt T., Schindler F., Schubert M.C.
Analysis of Temperature Dependent Characteristics of Diffused Regions in Silicon Solar Cells
2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019 , Band: 46, Seiten: 3032 - 3036
KurzfassungTo maximize the annual energy output of silicon based photovoltaic modules beyond standard testing conditions (STC), it is important to assess temperature dependent device properties of silicon solar cells. In this study we characterize the temperature dependence of the dark saturation current density J 0 of diffused regions (e.g. emitter layers). In particular, we test whether the theoretical first-order approximation of J 0 /n i 2 being temperature independent holds. For this, the lifetime of symmetrically diffused silicon samples with varying dopant types and profiles is measured by temperature dependent modulated photoluminescence to extract J 0 as a function of injection and temperature. We find that for passivated diffused regions J 0 /n i 2 shows a temperature coefficient in the range of -0.5 to -0.7 %/K, while even lower coefficients and more scattering is observed for the unpassivated samples. The presented data and approach can be used to improve the beyond-STC predictive power of device simulations which use J 0 inputs.

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Eberle R., Fell A., Niewelt T., Schindler F., Schubert M.C.
Analysis of Temperature Dependent Surface Recombination Properties
2019 SiliconPV 2019, the 9th International Conference on Crystalline Silicon Photovoltaics AIP, Band: 2147, Seiten: 1400001-1 - 1400001-7
A. Reiterer,, D. Störk,, K. Wäschle,, A. Leydecker,, M. Leidinger
Automatisierte Interpretation von 3D-Daten - Stand der Technik und zukünftige Entwicklungen
2019 1. Kolloquium Straßenbau in der Praxis; Ostfildern TAE Technische Akademie Esslingen, Technische Akademie Esslingen; F. Schäfer, Seiten: 453 - 456
M. Leidinger,, A. Reiterer,, D. Steiger
Pavement Profile Scanner PPS-Plus - Unerreichte Präzision bei hohen Geschwindigkeiten
2019 1. Kolloquium Straßenbau in der Praxis; Ostfildern TAE Tagungshandbuch 2019, TAE Technische Akademie Esslingen; F. Schäfer, Seiten: 327 - 331
Ujwala P.,, Pentek Q.,, Hein S.,, Miernik A.,, Reiterer A.
Image based 3D reconstruction of the bladder using structure-from-motion – Proof of principle in a phantom model
2019 European Association of Urology
Kurzfassung#AM19-1411
Vierhub-Lorenz Valentin Predehl Katharina, Wolf Sebastian Christoph S. Werner Christoph S., Kühnemann, Frank, Reiterer, Alexander
A multispectral tunnel inspection system for simultaneous moisture and shape detection
2019 SPIE Remote Sensing, 2019, Strasbourg, France , Band: Vol. 11157, 111570T
KurzfassungIn this paper, we present the implementation of a differential-absorption measurement-technique for surface moisture detection into a laser scanner aiding modern tunnel inspections. The use of laser scanners for tunnel inspections can reduce costly tunnel closures and provide digital data, compliant with modern building information modeling (BIM). Unfortunately, available systems are typically limited to pure 3D mapping. The Fraunhofer Institute for Physical Measurement Techniques IPM is developing a novel multi-parameter laser scanning system. For the first time, this system allows the simultaneous measurement of 3D-geometry, remission and surface moisture. The scanner measures simultaneously with two collinear laser beams with distinct wavelengths. One is centered at the absorption band of water at 1450 nm wavelength, while the other, with 1320 nm wavelength, is used as an intensity reference. The intensity ratio gives a good estimate of the surface water content. Additionally, the power of both lasers is modulated with a high frequency. This enables simultaneous measurement of the distance by comparing the phase difference of the backscattered light with a local reference. With this approach, we are able to record up to two million points per second containing distance, intensity and moisture information. Besides the technical implementation, we present point clouds from multiple test objects and surfaces. The presented data nicely demonstrates the ability to differentiate between absolute intensity variations, e.g. caused by dirt, and actual water contamination.
Luderer C., Messmer C., Bivour M., Hermle M.
Contact Resistivity of the TCO/a-Si:H/c-Si Heterojunction
2019 , Seite: 538–540
Kurzfassungsiehe pdf!
Klaas Björn, Baulig Claudia, Predehl,Katharina, Schwarzer, Stefan
Development of a multispectral scanning lidar system for measuring wind velocity, air temperature and moisture
2019 SPIE Remote Sensing, 2019, Strasbourg, France
KurzfassungMeasurements of atmospheric parameters, such as wind velocity, air temperature and moisture, provide important information for a diverse set of ﬁelds, ranging from estimating energy output of wind farms to predicting extreme weather events to understanding urban climatology. Performing these measurements quickly, reliably and with high accuracy presents a yet unsolved challenge. Especially when working in or close to complex terrain, such as forests, hillsides or urban landscapes, no available system can properly perform such measurements. The Fraunhofer Institute for Physical Measurement Techniques IPM is developing a novel multispectral scanning LiDAR system. The goal is to simultaneously and accurately measure wind speed, air temperature and moisture over complex terrain for the ﬁrst time. We present the current state of a scanner system for synchronized steering of multiple laser beams from diﬀerent LiDAR units towards positions in the commonly visible intersection volume, subtending up to 7/8th of the full solid angle. We also present the state of an in-house developed Doppler Wind LiDAR and our current proposal for a combined wind, air temperature and water vapor LiDAR.
Qussous R, Künzel T, Weidlich A
Effects of a Coal Phase-Out on Market Dynamics: Results from a Simulation Model for Germany
2019 16th International Conference on the European Energy Market

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Dlugosch, Michael, Fritsch, Jens, Hiermaier, Stefan, Lukaszewicz, Dirk
Efficiency-driven model simplifications in crash simulations of FRP-metal hybrid material systems in automotive body structures
2019 International Conference on Simulation Process and Data Management (SPDM) 2019, Quebec A world of engineering simulation. NWC 2019, NAFEMS World Congress : 17-20 June, Quebec City, Canada : incorporating SPDM, International Conference Simulation Process & Data Management : summary of pr, International Association for the Engineering Analysis Community -NAFEMS-:, Seite: 21
KurzfassungGrowingly stringent CO2-emission regulations lead to increased efforts to explore novel multi-material systems for effective lightweight design solutions. These often exhibit a complex internal architecture including interfaces between the discrete material phases. Particularly in highly nonlinear crash simulations of complex structures, model fidelity is a key aspect in the trade-off considerations between accurate predictive capabilities of a modeling technique and the resources needed for model development as well as computationally producing and processing solutions. The present study investigates various model simplification strategies for Finite Element (FE)-simulations of automotive crash structural concepts composed of fiber-reinforced plastics (FRP)-metal hybrid material systems in view of the conflicts invoked by strict model efficiency requirements. This particularly implies the modeling resolution of the FRP phase and different modeling techniques for the adhesive interface between the material phases and the respective implications on the predictive qualities of the simulation results. All results are compared to hardware experiments of hybrid generic structural components under crash loading conducted by the authors. The results show, that the model fidelity in the FRP phase does generally have a strong correlation with the predictive capabilities of the overall simulation. Comparing the simulation and the experimental data of generic components shows that explicitly modeling the cohesive behavior at the adhesive interface is not only more complex, it is also not necessarily bound to produce more accurate results than a simple modeling approach using rigid tie connections. In terms of computational efficiency however, the tie modeling approach does not decrease the computational time solving the model, which limits potential efficiency benefits to the reduced modeling complexity and the omission of the adhesive’s characterization process.

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Maus S., Lohmüller S., Mu D., Schön J., Niewelt T., Wolf A., Preu R.
Impact of POCl3 Diffusion Process Parameters on Oxygen Precipitation in Czochralski-Grown Silicon
2019 , Seite: 151–156
Kurzfassungsiehe pdf!
Steinhauser B., Niewelt T., Richter A., Eberle R., Polzin J.-I., Feldmann F., Schubert M.C., Hermle M.
Life(time) at the Limits – Very High Lifetimes in Crystalline Silicon Measured by Photoconductance and Photoluminescence
2019 EU PVSEC
Bett Alexander, Schulze Patricia, Winkler Kristina, Kabakli Özde, Bivour Martin, Cojocaru Ludmila, Ketterer Ines, Mundt Laura, Tutsch Leonard, Hermle Martin, Glunz Stefan, Goldschmidt Jan, Kamat Prashant, Angelis Filippo, Di Carlo Aldo
Monolithic perovskite silicon tandem solar cells with high-bandgap perovskite absorber exceeding 1.8 V open-circuit voltage
2019 Fundació Scito
Schäfer M, Hofmann F, Abdel-Khalek H, Weidlich A
Principal Cross-Border Flow Patterns in the European Electricity Markets
2019 16th International Conference on the European Energy Market

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Wanapinit N, Weidlich A, Thomsen J
Promoting flexibility from prosumers through a generic characteristic flexibility model
2019 11. Internationale Energiewirtschaftstagung an der TU Wien
KurzfassungEnergy systems require flexibility - an ability to respond to changes - to integrate higher shares of variable renewable energy. On the whole, flexibility potential from prosumers is significant and stems from various processes. As each flexibility option is unique, before utilization, its potential first must be assessed. This paper presents a universal flexibility model, so called generic characteristic flexibility model (GCM), as tool to characterize and assess most, if not all, flexibility options from prosumers. GCM establishes a generic flexible process with components representing physical parts, e.g. machine and storage, and various administrative decisions, e.g. changes in output delivery or operating hours. Each component is described with essential characteristics and constraints. As demonstrations, three flexible systems representing various sectors – a district heating system, a household appliance, and a production process - are characterized and modelled using GCM. Flexibility in these systems is utilized to minimize costs under time-varying electricity prices and subject to operational constraints. This in turn proves the concept of a universal flexibility model. GCM eases burdens of actors - flexibility providers and users - to develop assessment tools for each flexibility options. Its pre-defined structure and characteristics also support identification of flexible processes and communication between actors. Thus, it helps promoting the utilization of flexibility from prosumers.

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Fischer, Kai, Hiermaier, Stefan, Riedel, Werner, Häring, Ivo
Statistical driven vulnerability assessment for the resilience quantification of urban areas
2019 13th International Conference on Applications of Statistics and Probability in Civil Engineering (ICASP), ICASP 2019, Seoul Online resource : Seoul, South Korea, May 26-30, 2019 Seoul, 2019 http://s-space.snu.ac.kr/handle/10371/142934 Paper 26, 8 S., Band: 26, Seite: 8
KurzfassungThe formation of new threats and the increasing complexity of infrastructure elements underline the need for more robust and sustainable systems, which are able to cope with adverse events. Achieving sustainability requires the increase of resilience. Currently, a comprehensive approach for the quantification of resilience is missing. Within this paper, a new generalized mathematical framework is presented to assess the resilience of complex systems, like urban areas. A clear definition of terms and their interaction builds the basis of this assessment scheme. Risk-based approaches are extended with the dimension of time, to quantify the susceptibility, the vulnerability and the recovery behavior of complex systems for multiple threat scenarios. Engineering approaches are applied to assess expected damage effects and are combined with statistical methods to weight the probability of occurrence and the exposition of the investigated system to the source of disruptive events. Resilience is covered by indicators for preparation, prevention, protection, response and recovery. The presented approach is able to determine these indicators and provides decision support, which enhancement measures are more effective. Hence, the framework quantifies, if it is better to avoid a hazardous event or to tolerate an event with an increased robustness, for example. An application example assesses urban areas with consideration of multiple adverse events, like terrorist attacks or earthquakes, and multiple buildings. Each urban object includes a certain number of attributes, like the object use, the construction type, the time-dependent number of persons and the value to derive different performance targets. The assessment results in the identification of weak-spots through the evaluation of single resilience indicators.
Messmer C., Fell A., Feldmann F., Schön J., Hermle M.
Upgrade PERC with TOPCon: Efficiency Potential by Taking into Account the Electrical Gains and Optical Losses
2019
Kurzfassungsiehe pdf!

2018

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Ledford, Noah, Paul, Hanna, Isakov, Matti, Hiermaier, Stefan
High rate loading of hybrid joints in a Split Hopkinson Tension Bar
2018 International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading (DYMAT)/Arcachon EPJ Web of Conferences, Band: 183
KurzfassungBonded joints are nowadays seen as one of the preferred joining methods in aerospace applications. However, the difficulty in certifying bond strength and the relatively low energy absorption capability of the joint are barriers to widespread adoption. The use of a hybrid joint, that is, the combination of a mechanical and a bonded joint, allows for a fail-safe design and offers improved performance of the joint. The quasi-static properties of hybrid joints have been investigated by a number of researchers. In contrast, the high rate loading regime has been only sparsely investigated. In this work, hybrid joints are tested in quasi-static and high rate loading in order to analyze their loading rate dependence. The hybrid joint studied is a composite-aluminum double lap shear joint with Sikaforce 7752 adhesive and Hi-Lite-315 countersunk titanium bolts. In order to quantitatively analyze the high rate behavior of the hybrid joints and their respective sub-components, additional tests are carried out on simply bonded and simply bolted specimens. The high rate characterization was performed with a Split Hopkinson Tension Bar. The main challenges for these tests are the relatively large specimen size and complex specimen geometry needed to properly characterize the joint behavior, which both are in contradiction with the assumptions of the classical Split Hopkinson Bar-analysis. In this paper we describe an approach to solve these challenges based on an elastic wave analysis of the system.
Weidlich A, Künzel T, Klumpp F
Bidding Strategies for Flexible and Inflexible Generation in a Power Market Simulation Model
2018 1st International Workshop on Energy Market Engineering ACM e-Energy 2018, Band: 1, Nummer: 1, Seiten: 532 - 537
KurzfassungThis paper presents an electricity market simulation model that focuses on the distinction between flexible and inflexible generation, and formulates bidding strategies for capacities of either type. Bid formulation for flexible power plants, storage and demand response units at a balancing power market and an energy exchange market are described, and exemplary results from the simulation model are presented. It is shown that the simulation model can realistically reproduce market outcomes for the example of the German market zone, and that it can also simulate negative market prices. Results reveal that power plants could be deployed in a more flexible manner than they are currently done in actual market operation, where larger variations of output are avoided especially for nuclear and lignite-fired power plants. The model can be used for analyzing future energy scenarios of high shares of variable renewable energy (VRE), and help answering research questions related to the required system flexibility for balancing out VRE fluctuations.
Watson, Erkai, Maas, Hans-Gerd, Schaefer, Frank, Hiermaier, Stefan
Trajectory based 3D fragment tracking in hypervelocity impact experiments
2018 Symposium "Towards Photogrammetry 2020"/Riva del Garda ISPRS, 2018 (The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2, Band: XLII-2
KurzfassungCollisions between space debris and satellites in Earth’s orbits are not only catastrophic to the satellite, but also create thousands of newfragments, exacerbating the space debris problem. One challenge in understanding the space debris environment is the lack of data onfragmentation and breakup caused by hypervelocity impacts. In this paper, we present an experimental measurement technique capableof recording 3D position and velocity data of fragments produced by hypervelocity impact experiments in the lab. The experimentalsetup uses stereo high-speed cameras to record debris fragments generated by a hypervelocity impact. Fragments are identified andtracked by searching along trajectory lines and outliers are filtered in 4D space (3D + time) with RANSAC. The method is demonstratedon a hypervelocity impact experiment at 3.2 km/s and fragment velocities and positions are measured. The results demonstrate thatthe method is very robust in its ability to identify and track fragments from the low resolution and noisy images typical of high-speedrecording.
Tucher Nico, Höhn Oliver, Bläsi Benedikt, Goldschmidt Jan Christoph
Advanced module optics of textured perovskite silicon tandem solar cells
2018 SPIE Photonics Europe, 2018, Strasbourg, France Photonics for Solar Energy Systems VII,, Band: 10688, Seiten: 1068805-1 - 1068805-5
KurzfassungPerovskite silicon tandem solar cells can overcome the efficiency limit of single junction silicon solar cells. Optical modeling plays a crucial role for the device optimization but it becomes complex if optically thin and thick layers as well as interface textures, such as random pyramids, are involved. Within this work, the OPTOS simulation formalism is applied in order to compare perovskite silicon tandem solar cells with planar and textured front side. Modeling the configuration with planar front side and textured rear exhibits a matched photocurrent density of 18.2 mA/cm2. For the system with textured front and planar rear side the reduced reflectance leads to a photocurrent density of 19.6 mA/cm2 although parasitic absorption in the Spiro-OMeTAD and ITO layers increases. Taking into account the full module stack in the OPTOS simulation shows an increased front side reflectance and parasitic absorption in the EVA. The difference between the resulting photocurrent densities (17.8 mA/cm2 and 18.9 mA/cm2) demonstrates the optical superiority of the investigated system with textured front side not only at cell level but also in the full module stack.

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Stevens L, Hauser H, Höhn O, Tucher N, Wellens C, Jahn R, Glaubitt W, Müller C, Bläsi B
Nanoimprinted sol-gel materials for antireflective structures on silicon solar cells
2018 SPIE Photonics Europe, 2018, Strasbourg, France
KurzfassungSilicon solar cells are typically textured by means of wet chemical etching in order to enhance absorption. Within this work, we apply an optically functional layer onto a planar silicon surface. This layer is made of a high refractive index sol-gel material and can be patterned by nanoimprint lithography (NIL). In first experiments, we investigated various sol-gel based TiO2 precursors and evaluated their refractive index as well as the possibility to apply them in NIL. The refractive index was determined to be up to 2.25 using ellipsometry. This result was achieved with a solution composed of amorphous TiO2 precursors mixed with ethanol and 1,5-pentanediol. The topography of the patterned TiO2 layers were investigated using an atomic force microscope (AFM) and a scanning electron microscope (SEM) revealing a period of 1 μm and a pattern depth of 60 nm after sintering. Furthermore, optical modeling was used to optimize the structure parameters in order to minimize the weighted reflectance of an encapsulated silicon solar cell

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Eberle R., Kwapil W., Schubert M. C.
Temperature dependent imaging of solar cell losses
2018 8th International Conference on Crystalline Silicon Energy Procedia, Band: 1999, Seiten: 020005-1 - 020005-6
KurzfassungGLOBAL cell efficiencies are measured at standardized testing conditions (STC) to be able to compare technology improvements worldwide in a systematic manner. However, these STC are rarely met in real operation conditions of solar cells as especially temperature and irradiation intensity differ a lot to laboratory standards. In this study we present an approach to characterize the temperature-dependent behavior of solar cells with spatial resolution. Therefore, techniques for imaging of series resistance, short-circuit current and a Local IV analysis are performed at different temperatures. At each of these a cell analysis is conducted to evaluate the cell’s efficiency and its losses as well as to calculate temperature coefficients of cell parameters. Especially due the spatial resolution, information about the influence of different cell areas on the cell’s performance at varying temperatures can be gained as a valuable basis for further cell improvements. Good agreement of temperature coefficients calculated from global measurements and averaged from maps of fitted values assuming a linear behavior with temperature show the applicability of our approach which enables efficiency optimizations of silicon solar cells for non-ideal operation conditions.
Hoschke, Klaus, Pfaff, Aron, Fleig, Luisa, Bierdel, Marius, Jaecklein, Martin, Riedel, Werner, Hiermaier, Stefan
A parametric mesostructural approach for robust design of additive manufacturing parts
2018 Fraunhofer Direct Digital Manufacturing Conference (DDMC)/Berlin Fraunhofer Direct Digital Manufacturing Conference DDMC 2018, Band: 1
KurzfassungAdditive Manufacturing (AM) allows for production of potentially complex design solutions and motivates the use of Structural Optimization tools in product development to chase the structural limit of a design problem and its solution concept. Scratching on the limits of the material strength, design solutions can lack robustness concerning simplifications in model assumptions and uncertainties. However, the design freedom with AM can also actively be used to enhance robustness and reliability of solutions. To this end, an approach is presented that introduces Parametric Mesostructures into selective areas of the Additive Design. Structural members and coherent mechanical characteristics of these mesostructures can significantly reduce local stress peaks and can account for uncertainties, e.g. direction of load application. Their design is motivated by Structural Optimization and analysis results. Implementation of the approach is demonstrated and discussed on the example of a structural aircraft component.
Ganzenmüller, Georg, Langhof, Timo, Hiermaier, Stefan
A constant acoustic impedance mount for sheet-type specimens in the tensile Split-Hopkinson Bar
2018 International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading (DYMAT) <12, 2018, Arcachon> Les Ulis: EDP Sciences, 2018 (EPJ Web of Conferences 183) ISBN: 978-2-7598-9053-8 Art. 02064, 4 S., Seite: 4
KurzfassungThis paper addresses a problem well-known amongst practitioners of the Split-Hopkinson Tension Bar method: attaching a flat test specimen made from sheet material to the cylindrical input-and output bars. To date, slotting the bar ends and gluing the specimens into these ends with high-strength adhesives is the gold standard. However, this approach is not universally applicable because some materials are difficult to bond, and the adhesion surface is limited by the bar diameter, meaning that only small width specimens can be tested. In contrast, the hitherto published mechanical clamping mechanisms typically introduce excessive additional mass into the Split-Hopkinson system which detrimentally affects wave propagation and thus causes errors in the stress-strain signals. We circumvent this problem by designing a mechanical clamping device which has the same acoustic impedance as the bar material and is suitable to securely attach specimens with a width larger than the bar diameter. The benefits of our new clamping device are demonstrated by reporting tensile stress-strain data for Polycarbonate at high strain rates. The data is free from unwanted oscillations and enables accurate determination of dynamic strength and stiffness.
Hoschke, Klaus, Pfaff, Aron, Fleig, Luisa, Bierdel, Marius, Jaecklein, Martin, Riedel, Werner, Hiermaier, Stefan
A parametric mesostructural approach for robust design of additive manufacturing parts
2018 Fraunhofer Direct Digital Manufacturing Conference, DDMC 2018, Fraunhofer Verlag, Stuttgart, Seite: 6
KurzfassungAdditive Manufacturing (AM) allows for production of potentially complex design solutions and motivates the use of Structural Optimization tools in product development to chase the structural limit of a design problem and its solution concept. Scratching on the limits of the material strength, design solutions can lack robustness concerning simplifications in model assumptions and uncertainties. However, the design freedom with AM can also actively be used to enhance robustness and reliability of solutions. To this end, an approach is presented that introduces Parametric Mesostructures into selective areas of the Additive Design. Structural members and coherent mechanical characteristics of these mesostructures can significantly reduce local stress peaks and can account for uncertainties, e.g. direction of load application. Their design is motivated by Structural Optimization and analysis results. Implementation of the approach is demonstrated and discussed on the example of a structural aircraft component.
Mittag M., Reise C., Wöhrle N., Eberle R., Schubert M.C., Heinrich M.
Approach for a Holistic Optimization from Wafer to PV System
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion
KurzfassungModels for the calculation of losses in PV systems are widely applied but typically focus on single components (i.e. the solar cell). We discuss relevant models and combinations thereof to analyze losses from wafer to system. We propose a holistic approach to analyze losses from laboratory to environmental conditions. The proposed approach focusses on practically relevant interfaces (i.e. STC module power) and is based on separated influence factors.
Tranberg B, Schäfer M, Brown T, Hörsch J, Greiner M
Flow-based analysis of storage usage in a low-carbon European electricity scenario
2018 15th International Conference on the European Energy Market (EEM), 2018

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Bläsi Benedikt, Höhn Oliver, Hauser Hubert, Cariou Romain, Benick Jan, Feldmann Frank, Beutel Paul, Lackner David, Hermle Martin, Siefer Gerald, Glunz Stefan, Bett Andreas, Dimroth Frank, Tucher Nico, Wehrspohn Ralf, Sprafke Alexander
Photonic structures for III-V//Si multijunction solar cells with efficiency >33%
2018 SPIE, Seite: 2
KurzfassungSilicon based multi-junction solar cells are a promising option to overcome the theoretical efficiency limit of a silicon solar cell (29.4%). With III-V semiconductors, high bandgap materials applicable for top cells are available. For the application of such silicon based multi-junction devices, a full integration of all solar cell layers in one 2-terminal device is of great advantage. We realized a triple-junction device by wafer-bonding two III-V-based top cells onto the silicon bottom cell. However, in such a series connected solar cell system, the currents of all sub-cells need to be matched in order to achieve highest efficiencies. To fulfil the current matching condition and maximise the power output, photonic structures were investigated. The reference system without photonic structures, a triple-junction cell with identical GaInP/GaAs top cells, suffered from a current limitation by the weakly absorbing indirect semiconductor silicon bottom cell. Therefore rear side diffraction gratings manufactured by nanoimprint lithography were implemented to trap the infrared light and boost the solar cell current by more than 1 mA/cm2. Since planar passivated surfaces with an additional photonic structure (i.e. electrically planar but optically structured) were used, the optical gain could be realized without deterioration of the electrical cell properties, leading to a strong efficiency increase of 1.9% absolute. With this technology, an efficiency of 33.3% could be achieved.
Eberle R., Fell A., Mägdefessel S., Schindler F., Schubert M.C.
Prediction of local temperature-dependent performance of silicon solar cells
2018 EU PVSEC

2017

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Watson, Erkai, Gulde, Max, Schaefer, Frank, Hiermaier, Stefan
Optical fragment tracking in hypervelocity impact experiments
2017 International Astronautical Congress (IAC)/Adelaide 68th International Astronautical Congress (IAC 2017): Unlocking Imagination, Fostering Innovation and Strengthening Security, Band: 6, Seiten: 3585 - 3592
KurzfassungIn-orbit impacts between satellites and space debris lead to varying degrees of fragmentation, ranging anywhere from minor damage to complete breakups. In this paper, we describe an experimental measurement approach for studying the fragmentation effects of hypervelocity impact in the laboratory. We investigate hypervelocity impacts on a thin aluminum bumper plates and track individual fragments in the debris clouds with an innovative algorithm that bases matches on trajectories instead of features. The experimental setup involves recording the debris cloud fragments illuminated by a thin laser plane with a high-speed video camera. The image sequence is analyzed, yielding spatio-temporal information about each fragment in the debris cloud. This allows individual fragment size and velocity information, to directly measured.
F. Staab, F. Balle, J. Born
Ultrasonic Torsion Welding of Aging Resistant Al/CFRP Joints - Concepts, Mechanical and Microstructural Properties
2017 21st Symposium on Composites, Bremen Key Engineering Materials, Trans Tech Publications, Band: 742, Seiten: 395 - 400
Schäfer M, Schwenk-Nebbe LJ, Hörsch J, Tranberg B, Greiner M
Allocation of nodal costs in heterogeneous highly renewable European electricity networks
2017 14th International Conference on the European Energy Market (EEM), 2017, Seiten: 1 - 6
KurzfassungWe consider a simplified model of a future European electricity network with a high share of renewable generation. In a cost optimal design of such a system, most of the renewable generation capacity is placed at locations with favorable weather conditions, that is for instance onshore wind in countries bordering the North Sea and solar PV in South European countries. Countries with less favorable renewable generation conditions benefit from this capacity by importing the respective electricity as power flows through the transmission grid. Using flow tracing techniques, we disentangle the emerging pattern of imports and exports and assign shares of the distributed generation capacity in the European system to the countries which actually make use of them. This procedure yields nodal levelized costs, which incorporate both internal and external generation costs associated with the electricity consumption in a country.
Künzel T, Klumpp F, Weidlich A
Modellgestützte Analyse der Bereitstellung von Flexibilität auf dem Strom- und Regelleistungsmarkt in Deutschland
2017 Optimierung in der Energiewirtschaft VDI-Berichte, Band: 2303, Seiten: 31 - 46

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Kökbudak Gamze, Müller Ralph, Feldmann Frank, Fell Andreas, Turan Raşit, Glunz Stefan, Kökbudak G., Müller R., Feldmann F., Fell A., Turan R., Glunz S.
On the Determination of the Contact Resistivity for Passivating Contacts Using 3D Simulations
2017
KurzfassungBesides surface passivation, a low contact resistivity is one of the most important requirements of passivating contacts in order to achieve good carrier selectivity. In this work, different methods to determine the contact resistivity were performed and compared using a passivating contact structure consisting of poly silicon on a thin silicon oxide. As the traditional 1D Transmission Line Model (TLM) includes many assumptions that are not valid for complicated structures and even the application of the analytical 2D TLM is limited, especially for very low contact resistivity values, 3D numerical simulations with Quokka3 were carried out to accurately model passivating contact structures and determine the contact resistivity by comparison to electrical measurements. The investigated sample showed both, good passivation quality with implied open-circuit voltage iVoc of 716 mV together with a low specific contact resistivity of 0.21 mΩ·cm2 as extracted from the numerical simulations. Using our method, it is possible to distinguish the sources of the contact resistivity. A fraction of 0.11 mΩ·cm2 could be attributed to the interface between metal & poly-Si layer and 0.10 mΩ·cm2 results from the interface between poly-Si layer & bulk.
Dlugosch, Michael, Spiegelhalter, Bastian, Soot, Thomas, Lukaszewicz, Dirk, Fritsch, Jens, Hiermaier, Stefan
Potentials of optical damage assessment techniques in automotive crash-concepts composed of FRP-steel hybrid material systems
2017 12th International Conference on Damage Assessment of Structures, DAMAS 2017. Proceedings, IOP, London, Seite: Art. 012044, 13
KurzfassungWith car manufacturers simultaneously facing increasing passive safety and efficiency requirements, FRP-metal hybrid material systems are one way to design lightweight and crashworthy vehicle structures. Generic automotive hybrid structural concepts have been tested under crash loading conditions. In order to assess the state of overall damage and structural integrity, and primarily to validate simulation data, several NDT techniques have been assessed regarding their potential to detect common damage mechanisms in such hybrid systems. Significant potentials were found particularly in combining 3D-topography laser scanning and X-Ray imaging results. Ultrasonic testing proved to be limited by the signal coupling quality on damaged or curved surfaces.
Niewelt T., Schindler F., Kwapil W., Eberle R., Schön J., Schubert M.
Understanding the Light-Induced Degradation at Elevated Temperatures: Similarities between Multicrystalline and Floatzone p-Type Silicon.8 pages / 33rd European Photovoltaic Solar Energy Conference and Exhibition; 218-225
2017
KurzfassungThis paper discusses degradation phenomena in crystalline silicon. We present new investigations of the light‐ and elevated temperature‐induced degradation of multicrystalline silicon. The investigations provide insights into the defect parameters as well as the diffusivity and solubility of impurity species contributing to the defect. We discuss possible defect precursor species and can rule out several metallic impurities. We find that an involvement of hydrogen in the defect could explain the characteristic observations for light‐ and elevated temperature‐induced degradation. Furthermore, we demonstrate analogies to the light‐induced degradation mechanisms at elevated temperatures observed in floatzone silicon, where several experimental results also indicate an involvement of hydrogen in the defect. Based on the similarities between multicrystalline and floatzone silicon, we suggest that both degradation phenomena might be caused by the same or similar defects. As we do not expect large concentrations of metals in floatzone silicon, we suggest that complexes of hydrogen and a species introduced during crystal growth might cause both degradation phenomena.

2016

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Ilchmann, C, Hess, S, Klatt, M
Open Source Modeling of Solar Process Heat Systems
2016 4th South African Solar Energy Conference
Hess, S, Beukes, H, Smith, G, Dinter, F
Solar Process Heat for South African Sugar Mills
2016 Proceedings of EuroSun 2016 / Palma de Mallorca
Nagel H, Kamp M, Eberlein D, Kraft A, Bartsch J, Glatthaar M, Glunz S
Enabling solderability of PVD Al rear contacts on high-efficiency crystalline silicon solar cells by wet chemical treatment
2016 32nd EU PVSEC, Seiten: 48 - 52
Dlugosch, M., Ihle, J., Lukaszewicz, D., Fritsch, J., Hiermaier, S.
Experimental investigation of automotive components consisting of hybrid FRP-metal material systems under crash loading
2016 2. Internationale Konferenz Euro Hybrid - Materials and Structures 2016. Proceedings, Institut fuer Verbundwerkstoffe -IVW-, Kaiserslautern, Kaiserslautern, Seiten: 63 - 68
KurzfassungIn the course of a strong trend towards automotive material diversification, hybrid material systems could offer solutions to design lightweight body-in-white structures particularly subject to crash loads in order to meet the demands of both ambitious efficiency goals and increasingly strict vehicle safety requirements. Hybrid material systems consisting of glass- and carbon fiber reinforced plastics and sheet steel are tested under axial impact loading and analyzed regarding their qualitative behavior and relevant crash metrics. The study shows the complex behavior of those material systems and the interaction between the material phases resulting in a complex system of parameter effects and interdependencies. Generally, the hybrid specimens studied indicated their applicability in automotive crash structures by exhibiting comparable results to pure FRP materials while simultaneously being potentially more compatible and cost efficient.
Bivour Martin, Temmler Jan, Zähringer Florian, Glunz Stefan, Hermle Martin
High work function metal oxides for the hole contact of silicon solar cells
2016 43rd IEEE Photovoltaic Specialists Conference (PVSC), Seiten: 215 - 220
Klomfass, A., Stolz, A., Hiermaier, S.
Improved explosion consequence analysis with combined CFD and damage models
2016 15th International Symposium on Loss Prevention and Safety Promotion in the Process Industries 2016. Proceedings, AIDIC, Mailand, Seiten: 109 - 114
KurzfassungThe most-widely used approach to explosion consequence analysis is the classical engineering method based on the combination of TNT equivalence, scaled distances and overpressure-based damage levels. This approach rests on established and easily comprehensible elements and permits a fast assessment of explosion consequences. There are however several limitations inherent in this approach. In contrast, a simulation-based approach using computational fluid dynamics (CFD) and structural dynamics (CSD) methods permits an analysis with a high level of detail regarding both the prediction of the explosive loads and the caused damage. This comes at the cost of complex simulation models which require expert knowledge, intense validation and a high computational effort. To bridge the gap between the classical simplified approach and the CFD/CSD based methods, we have developed a specialized CFD tool, the APOLLO Blastsimulator, with a built-in library of experimentally validated damage models and blast-injury models suitable for an improved explosion consequence analysis. The high resolution CFD tool uses globally and locally adaptive Cartesian grids and includes models for TNT detonations as well as gas detonations. The built-in damage models are based on experimentally validated single-degree-of-freedom (SDOF) representations of structural components. This paper gives a brief review on the classical approaches and their limitations and an overview on the concepts used in the APOLLO Blastsimulator and the SDOF damage models. For an exemplary explosion scenario the results obtained with different explosive source and damage models are compared.
Klomfass, A., Stolz, A., Hiermaier, S.
Improved explosion consequence analysis with combined CFD and damage models
2016 15th International Symposium on Loss Prevention and Safety Promotion in the Process Industries 2016. Proceedings, AIDIC, Mailand, Seiten: 109 - 114
KurzfassungThe most-widely used approach to explosion consequence analysis is the classical engineering method based on the combination of TNT equivalence, scaled distances and overpressure-based damage levels. This approach rests on established and easily comprehensible elements and permits a fast assessment of explosion consequences. There are however several limitations inherent in this approach. In contrast, a simulation-based approach using computational fluid dynamics (CFD) and structural dynamics (CSD) methods permits an analysis with a high level of detail regarding both the prediction of the explosive loads and the caused damage. This comes at the cost of complex simulation models which require expert knowledge, intense validation and a high computational effort. To bridge the gap between the classical simplified approach and the CFD/CSD based methods, we have developed a specialized CFD tool, the APOLLO Blastsimulator, with a built-in library of experimentally validated damage models and blast-injury models suitable for an improved explosion consequence analysis. The high resolution CFD tool uses globally and locally adaptive Cartesian grids and includes models for TNT detonations as well as gas detonations. The built-in damage models are based on experimentally validated single-degree-of-freedom (SDOF) representations of structural components. This paper gives a brief review on the classical approaches and their limitations and an overview on the concepts used in the APOLLO Blastsimulator and the SDOF damage models. For an exemplary explosion scenario the results obtained with different explosive source and damage models are compared.
Künzel T, Weidlich A
Methodik zur Quantifizierung der Grenzkosten flexibler Systemkomponenten
2016 3. Konferenz Zukünftige Stromnetze für Erneuerbare Energien, Berlin , Seiten: 110 - 114
Goldschmidt Jan, Bett Alexander, Bivour Martin, Bläsi Benedikt, Eisenlohr Johannes, Kohlstädt Markus, Lee Seunghun, Mastroianni Simone, Mundt Laura, Mundus Markus, Ndione Paul, Reichel Christian, Schubert Martin, Schulze Patricia, Tucher Nico, Veit Clemens, Veurman Welmoed, Wienands Karl, Winkler Kristina, Würfel Uli, Glunz Stefan, Hermle Martin
Monolithic perovskite silicon tandem solar cells with advanced optics
2016 Washington, D.C. Light, Energy and the Environment. Optical Nanostructures and Advanced Materials for Photovoltaics 2016, OSA
Haering, Ivo, Scharte, Benjamin, Hiermaier, Stefan
Towards a novel and applicable approach for Resilience Engineering
2016 6th International Disaster and Risk Conference, IDRC 2016. Extended Abstracts, GRF, Davos, Seiten: 272 - 276
KurzfassungResilience Engineering can provide society and its critical infrastructure and systems with means, methods and technologies to overcome disruptions with as less harm as possible. In this context it is of utmost importance to identify ways to strengthen the adaptive capacity of up to complex socio technical systems. We try to establish Resilience Engineering as away of thinking that enables engineers to use their scientific expertise, creative ingenuity and help society to develop tools to handle all kinds of adverse events properly - from critical system disruptions, natural disasters, global terrorism to large-scale infrastructure failure. For that purpose, we suggest to deliberately limit the scope of Resilience Engineering towards engineering, i.e. mainly technological solutions, in contrast to the main body of Resilience Engineering literature. By that we try to pave the way for the next generation of engineers dealing with the extension from risk analysis and management towards resilience thinking. In short, Resilience Engineering means preserving critical functionality, ensuring graceful degradation and enabling fast recovery of systems with the help of engineered generic capabilities as well as customized technological solutions when the systems witness problems, unexpected disruptions or unexampled events. One central aspect of Resilience Engineering is the ability to quantify and measure resilience. Only adequate and valid indicators will give us the chance for comparatively and absolutely analyzing various systems with respect to their specific resilience. Finally, we need to be able to develop advanced methods for modelling and simulating, in particular for complex systems and their resilience towards adverse events. The presentation will hint at opportunities and research necessities for developing a new and integrated approach to model, simulate and improve the resilience of complex, interdependent, sociotechnical systems.

2015

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Hess, S
Technologies and Perspectives for Solar Water Heating and Solar Process Heat in Southern Af-rica
2015 1st International Renewable Energy Symposium IRES / Windhoek
Hess, S
Stationary Booster Reflectors for Solar Thermal Process Heat Generation
2015 3rd South African Solar Energy Conference /Skukuza
Cadoni E, Couque H, Hiermaier S
DYMAT 2015, 11th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
2015 EDP Sciences, Les UlisEPJ Web of Conferences 94.2015, EDP Sciences, Les Ulis
Hiermaier, S.
Foreword. DYMAT 2015 - 11th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
2015 DYMAT 2015, 11th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, EDP Sciences, Les Ulis, Seite: Art. 00001, 1
Ganzenmueller, G., Hiermaier, S., May, M.
Improvements to the prototype micro-brittle model of peridynamics
2015 Meshfree Methods for Partial Differential Equations VII, Springer International Publishing, Cham, Seiten: 163 - 183
KurzfassungThis paper assesses the accuracy and convergence of the bond-based Peridynamic model with brittle failure, known as the prototype micro-brittle (PMB) model. We investigate the discrete equations of this model, suitable for numerical implementation. It is shown that the widely used discretization approach incurs rather large errors. Motivated by this observation, a correction is proposed, which significantly increases the accuracy by cancelling errors associated with the discretization. As an additional result, we derive equations to treat the interactions between differently sized particles, i.e., a non-homogeneous discretization spacing. This presents an important step forward for the applicability of the PMB model to complex geometries, where it is desired to model interesting parts with a fine resolution (small particle spacings) and other parts with a coarse resolution in order to gain numerical efficiency. Validation of the corrected Peridynamic model is performed by comparing longitudinal sound wave propagation velocities with exact theoretical results. We find that the corrected approach correctly reproduces the sound wave velocity, while the original approach severely overestimates this quantity. Additionally, we present simulations for a crack growth problem which can be analytically solved within the framework of Linear Elastic Fracture Mechanics Theory. We find that the corrected Peridynamics model is capable of quantitatively reproducing crack initiation and propagation.
Ledford Noah, Paul Hanna, Ganzenmueller Georg, May Michael, Hoefemann Matthias, Otto Manuel, Petrinic Nikica
Investigations on specimen design and mounting for Split Hopkinson Tension Bar (SHTB) experiments
2015 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE DYMAT 2015 - 11TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, E D P SCIENCES, Band: 94
KurzfassungSplit Hopkinson Tension Bar (SHTB) experiments can be used to test the material behavior with high strain rates in tension loading. The influence of the specimen mounting and the specimen design on the test results was investigated. Three mounting methods were tested. The best signal is achieve using a mounting based on form fit. The three tested specimen designs all lead to a valid fracture behavior, but result in a different local strain rate.
Dlugosch, M., Lukaszewicz, D., Fritsch, J., Hiermaier, S.
Mechanical characterization of hybrid material systems consisting of sheet metal and advanced composites
2015 20th International Conference on Composite Materials, ICCM 2015. Proceedings. Online resource, Seiten: Paper 4213 - 5, 16
KurzfassungStrip-shaped hybrid coupon specimens comprised of steel and glass/carbon fiber reinforced plastics are tested under quasistatic tension and 3-point-bending. The effects of major material and design parameters (steel and fiber type, laminate thickness and layup) on the stiffness, strength and the specific energy absorption are assessed. Furthermore, hybrid mechanisms resulting from the mutual interaction of both constituent materials are presented. Although anticipated effects on the hybrid specimens' stiffness and strength are widely confirmed, the fiber type for example exhibits a distinctly smaller impact than expected. The specimens' loading and failure behavior is rather dominated by the type of steel and its characteristics. Thus, glass fiber reinforced hybrid variants generally keep up with carbon fiber reinforced hybrid variants in terms of mechanical properties. Considering the difference in price, this is of particular interest for hybrid mid or high volume crash structural applications. As hybrid mechanism, a distinct extension of the maximum strain is observed for both composites (up to 48 %) and steel (up to 23 %) when joined in a hybrid specimen and tested under tensile loads. Furthermore, having composites on the rather pressure loaded side in 3-point-bending results in a 26 %-increase in mass specific energy absorption (compared to reverse loading) due to an enhanced composite failure mode and the stabilizing effect of the steel strip.
Dlugosch, M., Fritsch, J., Lukaszewicz, D., Hiermaier, S.
New method to analyze numerical crash simulation data to assess the suitability of hybrid composite structures in automotive applications
2015 30. American Society for Composites 2015. Proceedings. CD-ROM, DEStech Publications, Lancaster, Pa., Seite: Paper 1554, 15
KurzfassungIn order to enhance development processes for multi material vehicle architecture concepts involving composites or hybrid composite-metal material systems a method is presented that aims to rationalize engineering judgements by means of quantifiable criteria for the suitability of a certain hybrid material system for a particular structural application. A number of significant crash load cases for a structure is considered simultaneously by superimposing the output data of several numerical crash simulations and defining criteria to qualify the suitability of a particular hybrid material system. The work introduced here focusses on the analysis of the global anisotropy of the crash loading situation as an indicator for a rather composite- or metal-intensive hybrid material system. The definition of the anisotropy criterion and the implementation of the method into the development infrastructure of automotive engineering is presented. A first step validation using simple flat coupon specimen simulations shows reasonable results and proves the applicability of the method.
Nagel H, Glatthaar M, Glunz S
Quantitative assessment of the local leakage current in PV modules for degradation prediction
2015 31st EU PVSEC, Seiten: 1825 - 1829
Glunz S, Feldmann F, Richter A, Bivour M, Reichel C, Steinkemper H, Benick J, Hermle M
The irresistible charm of a simple current flow pattern – 25% with a solar cell featuring a full-area back contact
2015 31st EU PVSEC, Seiten: 259 - 263
Hackel, T., Stein, D., Maindorfer, I., Lauer, M., Reiterer, A.
Track Detection in 3D Laser Scanning Data of Railway Infrastructure
2015 IEEE International Instrumentation and Measurement Technology Conference

2014

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Platzer, W, Helmke A, Hess, S
Climate Relevance in Solar Process Heat System Optimization - Case Studies with Different Temperatures and Load Profiles
2014 Proceedings of the 2nd South African Solar Energy Conference / Port Elizabeth
Benick J, Steinhauser B, Müller R, Bartsch J, Kamp M, Mondon A, Richter A, Hermle M, Glunz S
High efficiency n-type PERT and PERL solar cells
2014 40th IEEE Photovoltaic Specialists Conference (PVSC) 2014, Seiten: 3637 - 3640
Hiermaier S
Hopkinson Centenary Conference 2014
2014 Omniprint, Gundelfingen, Omniprint, Gundelfingen
Nagel H, Saint-Cast P, Glatthaar M, Glunz S
Inline processes for the stabilization of p-type crystalline Si solar cells against potential-induced degradation
2014 29th EU PVSEC, Seiten: 2351 - 2355
Reichel C, Feldmann F, Müller R, Moldovan A, Hermle M, Glunz S
Interdigitated back contact silicon solar cells with tunnel oxide passivated contacts formed by ion implantation
2014 29th EU PVSEC, Seiten: 487 - 491
Gautrein A, Schmiga C, Glatthaar M, Tremel W, Glunz S
Nanometallic silver inks for metallization of ITO-coated silicon solar cells: Influence of organic components
2014 29th EU PVSEC, Seiten: 1277 - 1281
Binder S, Schmiga C, Glatthaar M, Glunz S
Optimized aerosol jet printed silver contacts on lowly doped phosphorus and boron emitters
2014 29th EU PVSEC, Seiten: 1363 - 1367
Mondon A, Bartsch J, Kamp M, Brand A, Steinhauser B, Bay N, Horzel J, Glatthaar M, Glunz S
Plated nickel-copper contacts on c-Si: From microelectronic processing to cost effective silicon solar cell production
2014 29th EU PVSEC, Seiten: 1286 - 1291
Rauer M, Steinkemper H, Schmiga C, Glatthaar M, Glunz S
Recombination characteristics of p+ regions alloyed from screen-printed aluminum pastes containing boron additives
2014 29th EU PVSEC, Seiten: 1420 - 1423

2013

nach oben zur Jahresübersicht

Feldmann F, Bivour M, Reichel C, Hermle M, Glunz Stefan
A passivated rear contact for high-efficiency n-type silicon solar cells enabling high VocS and FF\textgreater82%: Proceedings of the 29th EUPVSEC, Paris, France
2013 28th EU PVSEC
Hiermaier, S.
Integrated experimental-numerical characterization of geological materials under shock and impact
2013 Rock Dynamics and Applications. State of the Art, CRC Press, Hoboken, Seiten: 71 - 76
KurzfassungScientific investigation of transient processes and engineering design of structures for dynamic loading conditions are still a great challenge. Other than quasi-static loading conditions a dynamic application of loads by impact or blast leads to additional effects that enhance the complexity of the thermo-mechanical material behavior. They can be reduced to two basic phenomena: first, the strain rate dependent change of mechanical behavior and, secondly, the evolution and propagation of shock waves. In order to understand the structural behavior under transient loading conditions, the involved materials need to be characterized by material tests. Mathematical formulations are needed for the description of both the strain rate dependent deviatoric behavior and the non-linear Equation of State responsible for the shock wave formation. Implemented into numerical codes these constitutive equations allow for a predictive simulation of the structural behavior. Sometimes nume rical simulation itself can be used to derive material properties. This is the case when for example the material is composed of two or more constituents for which the individual thermo-mechanical properties are known. Modeling the composite material as specimens and application of loads that may be outside the load types applicable in experiments leads to additional results not achievable in a pure experimental approach. Therefore, an integrated experimental-numerical approach for the characterization of materials under transient loading conditions is more and more preferred if predictive capabilities are needed for the highly complex phenomena observed in the related structural applications of interest.
Durr, N., Sauer, M., Gueldemeister, N., Wuennemann, K., Hiermaier, S.
Mesoscale Investigation of Shock Wave Effects in Dry and Water-saturated Sandstone
2013 12th Hypervelocity Impact Symposium, HVIS 2012. Proceedings, Elsevier, Amsterdam
KurzfassungIn this paper, the behavior of natural sandstone under hypervelocity impact is investigated numerically. Sandstone essentially consists of cemented quartz grains, it can be generally considered as a polygranular structure with air or water-filled pores. In order to study the influence of pores and water filling on the behavior of sandstone under shock loading, a numerical investigation at the mesoscale is performed. We explicitly resolve pores and the closure of pores in a homogeneous and isotropic quartz matrix. The quartz matrix is described with an equation of state and a strength model; the pore geometry is simplified. Two-dimensional planar shock simulations are conducted in order to analyze effects of quartz strength and water-saturation on pore crushing. Averaging is used to perform a macroscale analysis of the dependencies of pressure and shock velocity on particle velocity. The simulation results shall enhance the basis for the development of accurate macroscale sandstone models that take the water content into account.
Durr, N., Sauer, M., Gueldemeister, N., Wuennemann, K., Hiermaier, S.
Mesoscale Investigation of Shock Wave Effects in Dry and Water-saturated Sandstone
2013 12th Hypervelocity Impact Symposium, HVIS 2012. Proceedings, Elsevier, Amsterdam
KurzfassungIn this paper, the behavior of natural sandstone under hypervelocity impact is investigated numerically. Sandstone essentially consists of cemented quartz grains, it can be generally considered as a polygranular structure with air or water-filled pores. In order to study the influence of pores and water filling on the behavior of sandstone under shock loading, a numerical investigation at the mesoscale is performed. We explicitly resolve pores and the closure of pores in a homogeneous and isotropic quartz matrix. The quartz matrix is described with an equation of state and a strength model; the pore geometry is simplified. Two-dimensional planar shock simulations are conducted in order to analyze effects of quartz strength and water-saturation on pore crushing. Averaging is used to perform a macroscale analysis of the dependencies of pressure and shock velocity on particle velocity. The simulation results shall enhance the basis for the development of accurate macroscale sandstone models that take the water content into account.
Saint-Cast P, Nagel H, Wagenmann D, Schön J, Schmitt P, Reichel C, Glunz Stefan, Hofmann M, Rentsch J, Preu R
Potential induced degradation: Understand and avoid PID on the cell level
2013 28th EU PVSEC
Janz S, Schnabel M, Löper P, Summonte C, Canino M, López-Vidrier J, Hernández S, Garrido B, Glunz Stefan
Processing and characterisation of tandem solar cells from crystalline silicon materials
2013 28th EU PVSEC
Glunz Stefan, Lee J, Rein S
Strategies for improving the efficiency of Cz-silicon solar cells
2013 28th EU PVSEC, Seiten: 201 - 204

2012

nach oben zur Jahresübersicht

Fahr, S, Kramer, K, Mehnert, S, Hess, S
Solar Keymark certification for concentrating collectors - Comparing the quasi-dynamic and the steady-state method of EN 12975-2:2006-A1:2010
2012 Proceedings of Solar PACES /Marrakesh
Hess, S, Oliva, A, Hermann, M, Stryi-Hipp, G, Hanby, V
Solar Process Heat – System Design for Selected Low-temperature Applications in the Industry
2012 proceedings of the ISES Solar World Congress /Kassel.
Hess, S, Oliva, A, Helmke, A, Stryi-Hipp, G, Platzer, W
Solar Process Heat – System Design for Selected Low-temperature Applications in the Industry
2012 Proceedings of the 22. OTTI-Symposium Thermische Solarenergie / Bad Staffelstein.
Helmke, A, Kumar, DS, Hess, S, Stryi-Hipp, G
Solare Prozesswärme in Indien – Markterschließung und Systemtechnik
2012 Proceedings of the 23. OTTI-Symposium Thermische Solarenergie / Bad Staffelstein
Hiermaier, S., Kilchert, S., May, M.
Modellierung des Einflusses von Unregelmaessigkeiten in der Mikrostruktur auf das Versagen von UD-Composites
2012 Berechnung und Simulation - Anwendungen, Entwicklungen, Trends, NAFEMS Deutschland, Bernau am Chiemsee
Steinhauser, M., Ganzenmueller, G., Hiermaier, S.
Multiscale modeling and simulation of shock-wave impact failure in hard and soft matter
2012 28th International Symposium on Shock Waves 2011. Vol.1, Springer, Berlin, Seiten: 803 - 808
KurzfassungUnderstanding the mechanisms of failure in materials on various length- and time scales is a prerequisite for the design of new materials with desired superior properties such as high toughness or strength. On the macroscopic scale, many materials such as concrete or ceramics may be viewed as being homogeneous; however, on the scale of a few microns these materials often exhibit an inhomogeneous polyhedral granular structure which is known to influence its macroscopic mechanical and optical properties, see e.g. Steinhauser [1].
Bartsch J, Mondon A, Kamp M, Kraft A, Wendling M, Wehkamp N, Jawaid M, Lorenz A, Clement F, Schetter C, Glatthaar M, Glunz Stefan
Progress with multi-step metallization processes featuring copper as conducting layer at Fraunhofer ISE
2012 27th EU PVSEC, Seiten: 604 - 607
Schröer S, Bivour M, Schön J, Hermle M, Glunz Stefan
Reduction of absorption losses and efficiency gains by investigating amorphous/crystalline SHJ rear emitter solar cells
2012 27th EU PVSEC, Seiten: 759 - 762
Schmiga C, Rauer M, Rüdiger M, Glatthaar M, Glunz Stefan
Status and perspectives on n-type silicon solar cells with aluminium-alloyed rear emitter
2012 27th EU PVSEC, Seiten: 915 - 918
Mayer C, Dänekas C, Rohjans S, Breuer A, Theisen T, Drzisga T, König A, Luhmann T, Stadler M, Maerten M, Weidlich A
Technologische Migrationspfade in das Smart Grid
2012 VDE Kongress
Terheiden B, Horbelt R, Schiele Y, Seren S, Ebser J, Hahn G, Morrison D, Heasman K, Devenport S, Holman Z, Descoeudres A, de Wolf S, Baliff C, Saint-Cast P, Michl B, Schmiga C, Weber B, Glunz Stefan, Koentopp M
The european project 20plµS: 20 percent efficiency on less than 100µm thick industrially feasible crystalline-Si solar cells
2012 27th EU PVSEC, Seiten: 1586 - 1590
Richter A, Souren F, Schuldis D, Görtzen R, Benick J, Hermle M, Glunz Stefan
Thermal stability of spatial ALD deposited Al2O3 capped by PECVD SiNx for the passivation of lowly- and highly-doped p-type silicon surfaces
2012 27th EU PVSEC, Seiten: 1133 - 1137

2011

nach oben zur Jahresübersicht

Hess, S, Klemke, M, Oliva, A, Di Lauro, P, Hermann, M, Stryi-Hipp, G, Kramp, G, von Bodungen, O, Eisenmann, W, Hanby, V
Pilotanlage mit RefleC-Kollektoren: Anlagenkonzept und Monitoring-Ergebnisse
2011 Proceedings of the 21. OTTI-Symposium Thermische Solarenergie /Bad Staffelstein
Hess, S
Designing Solar Thermal Systems for Selected Industrial Applications
2011 Proceedings of the World Sustainable Energy Days, Conference Solar Process Heat / Wels.
SchĂ¤fer F, Hiermaier S
11th Hypervelocity Impact Symposium 2010. Proceedings
2011 Fraunhofer Verlag, StuttgartEpsilon. Forschungsergebnisse aus der Kurzzeitdynamik 20, Fraunhofer Verlag, Stuttgart
KurzfassungThe Hypervelocity Impact Symposium (HVIS) is a biennial event that serves as the principal forum for the discussion, interchange, and presentation of the basic physics of high- and hypervelocity impact and related scientific and technical areas. Hypervelocity impact is defined as the impact regime in which shock effects are important. The 11th HVIS was held from April 11 to 15, 2010, in Freiburg, Germany. Topics comprised: //1. Hypervelocity Phenomenology Studies //2. High-Velocity Launchers and Diagnostics //3. Spacecraft Meteoroid/Debris Shielding and Failure Analyses //4. Material Response (including EOS) //5. Fracture and Fragmentation //6. High-Velocity Penetration Mechanics and Target Response //7. Armor/Anti-Armor and Ballistic Technology //8. Analytical and Numerical Methodologies //9. Asteroid and Meteoroid Impacts, Planetary Defense Technology //The 11th HVIS attracted 150 scientists, engineers, and technical managers of academia, industry and government agencies from 15 countries. 55 presentations were given and 20 posters were presented. The related double-blind reviewed papers are all published in the Symposium’s proceedings, which are the major archival source of papers published in this field.
Peters M, Battaglia C, Aberle A, Bläsi B, Luther J, Glunz Stefan
3D optical simulation of scattering in thin film silicon solar cells
2011 26th EU PVSEC: Proceedings, Seiten: 2764 - 2767
May, M., Nossek, M., Hiermaier, S.
A multi-scale methodology for the evaluation of different fiber-matrix combinations using the generalized method of cells
2011 Seminar Progress in Simulating Composites 2011, NAFEMS Deutschland, Bernau am Chiemsee
May, M., Nossek, M., Petrinic, N., Hiermaier, S.
A new rate dependent cohesive zone model for impact applications
2011 Composites 2011, 3rd ECCOMAS Thematic Conference on the Mechanical Response of Composites. Proceedings, Leibniz Universit�t, Institut fuer Statik und Dynamik, Hannover
Jötten G, Weidlich A, Filipova-Neumann L, Schuller A
Assessment of flexible demand response business cases in the smart grid
2011 Proceedings of the 21st International Conference on Electricity Distribution CIRED, Frankfurt
Reiterer, A.
Automatisiertes Geo-Monitoring in der Ingenieurgeodäsie. Geo-Monitoring 2011 – Ein Paradigmenwechsel zur Beherrschung von Georisiken
2011 Clausthal-Zellerfeld
Müller R, Löper P, Hiller D, Gutsch S, Keding R, Reichel C, Bivour M, Hermle M, Janz S, Goldschmidt J, Zacharias M, Glunz Stefan
Calculation of the quasi fermi-level splitting in an ideal superlattice of silicon nanocrystals
2011 26th EU PVSEC: Proceedings, Seiten: 465 - 469
Kok K, Karnouskos S, Ringelstein J, Dimeas A, Weidlich A, Warmer C, Drenkard S, Hatziargyriou N, Lioliou V
Field-testing smart houses for a smart grid
2011 21st International Conference and Exhibition on Electricity Distribution CIRED, Frankfurt, Germany, Seiten: 6 - 9
Hermle M, Benick J, Bateman N, Glunz Stefan
N-type silicon solar cells with implanted emitter
2011 26th EU PVSEC: Proceedings, Seiten: 875 - 878
Eisenlohr J, Benick J, Peters M, Höhn O, Janz S, Goldschmidt J, Bläsi B, Hermle M, Glunz Stefan
Nanostructured back side reflectors for silicon solar cells
2011 26th EU PVSEC: Proceedings, Seiten: 344 - 348
Granek F, Hopman S, Kluska S, Fell A, Breitwieser M, Fleischmann C, Glatthaar M, Glunz Stefan
Progress in laser chemical processing for silicon solar cells
2011 26th EU PVSEC: Proceedings, Seiten: 1300 - 1304

2010

nach oben zur Jahresübersicht

Heimsath, A, Nitz, P, Hess, S
Concentrating solar collectors for process heat up to 250 °C and small scale CSP – Integrated optical design for improved performance
2010 Proceedings of EuroSun 2010 / Graz
Hess, S, Oliva, A, Di Lauro, P, Klemke, M, Hermann, M, Kramp, G, Eisenmann, W, Hanby, V
Solar Heat for Industrial Processes: RefleC-Collector Development and System Design
2010 Proceedings of EuroSun 2010 /Graz.
Hess, S, Oliva, A, Di Lauro, P, Klemke, M, Hermann, M, Stryi-Hipp, G, Kallwellis V, Kramp, G, Eisenmann, W, Hanby, V
Flachkollektor mit externen Reflektoren (RefleC): Entwicklungserfahrungen
2010 Proceedings of the 20. OTTI-Symposium Thermische Solarenergie. /, Bad Staffelstein
Jäger U, Suwito D, Benick J, Janz S, Hermle M, Glunz Stefan, Preu R
A simple laser based process for the formation of a LBSF for n-type silicon solar cells
2010 25th EU PVSEC, Seiten: 1386 - 1390
Bartsch J, Mondon A, Godejohann B.-J., Hörteis M, Glunz Stefan
Advanced front side metallization for crystalline silicon solar cells based on a fully plated contact
2010 25th EU PVSEC, Seiten: 1978 - 1983
Schmiga C, Rauer M, Rüdiger M, Meyer K, Lossen J, Krokoszinski H.-J., Hermle M, Glunz Stefan
Aluminium-doped p+ silicon for rear emitters and back surface fields: results and potentials of industrial n- and p-type solar cells
2010 25th EU PVSEC, Seiten: 1163 - 1168
Kluska S, Rodofili A, Mayer K, Fleischmann C, Granek F, Glunz Stefan
Analysis of local boron dopings formed with LCP
2010 25th EU PVSEC, Seiten: 1405 - 1409
Mayer K, Orellana Pérez T, Rostas M, Schumann M, Granek F, Glunz Stefan, Rosenfeld E, Kray D, Antoniadis H
Aromatic compounds as substitutes for 2-propanol as texturing additive in aqueous alkaline solutions
2010 25th EU PVSEC, Seiten: 2511 - 2515
Fischer S, Goldschmidt J, Krämer K, Biner D, Hermle M, Glunz Stefan
Calibrated photoluminescence measurements of the upconverter NaYF4: 20% ER3+ for silicon solar cells
2010 25th EU PVSEC, Seiten: 657 - 661
Löper P, Hiller D, Künle M, Gradmann R, Rothfelder M, Janz S, Hermle M, Zacharias M, Glunz Stefan
Carrier confinement and transport in high band gap materials with embedded Si quantum dots
2010 25th EU PVSEC, Seiten: 269 - 273
Walther S, Markovic I, Schuller A, Weidlich A
Classification of business models in the e-mobility domain
2010 Proceedings of 2nd European Conference Smart Grids and EMobility, Seiten: 20 - 21
Pysch D, Meinhardt C, Ritzau K.-U., Bivour M, Zimmermann K, Schetter C, Hermle M, Glunz Stefan
Comparison of intrinsic amorphous silicon buffer layers for silicon heterojunction solar cells deposited with different PECVD techniques
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 3570 - 3576
Bartsch J, Mondon A, Schetter C, Horteis M, Glunz Stefan
Copper as conducting layer in advanced front side metallization processes for crystalline silicon solar cells, exceeding 20% on printed seed layers
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 1299 - 1303
Reichel C, Reusch M, Granek F, Hermle M, Glunz Stefan
Decoupling charge carrier collection and metallization geometry of back-contacted back-junction silicon solar cells by using insulating thin films
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 1034 - 1038
Pysch D, Meinhardt C, Hermle M, Glunz Stefan
Development and understanding of the intrinsic and doped amorphous emitter-layer stacks for silicon heterojunction solar cells
2010 25th EU PVSEC, Seiten: 1820 - 1824
Benick J, Richter A, Li T.-T., Grant N, McIntosh K, Ren Y, Weber K, Hermle M, Glunz Stefan
Effect of a post-deposition anneal on Al\textlessinf\textgreater2\textless/inf\textgreaterO\textlessinf\textgreater3\textless/inf\textgreater/Si interface properties
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 000891 - 000896
Karnouskos S, Weidlich A, Kok K, Warmer C, Ringelstein J, Selzam P, Dimeas A, Drenkard S
Field trials towards integrating smart houses with the smart grid
2010 International Conference on Energy-Efficient Computing and Networking, Athens, Greece, Seiten: 114 - 123
Richter A, Henneck S, Benick J, Hörteis M, Hermle M, Glunz Stefan
Firing stable Al2O3/SiNx layer stack passivation for the front side boron emitter of n-type silicon solar cells
2010 25th EU PVSEC, Seiten: 1453 - 1459
Hörteis M, Benick J, Nekarda J, Richter A, Preu R, Glunz Stefan
Fundamental reactions during the formation of fired silver contacts and solar cell results
2010 2nd Workshop on Metallization Constance, Seiten: 6 - 11
Horteis M, Benick J, Nekarda J, Richter A, Preu R, Glunz Stefan
Fundamental studies on the front contact formation resulting in a 21% efficiency silicon solar cell with printed rear and front contacts
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 672 - 677
Ebong A, Rounsaville B, Cooper I, Tate K, Rohatgi A, Glunz Stefan, Horteis M, Met A, Gundermann M
High efficiency silicon solar cells with ink jetted seed and plated grid on high sheet resistance emitter
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 1363 - 1367
Saint-Cast P, Benick J, Kania D, Billot E, Richter A, Hermle M, Hofmann M, Rentsch J, Preu R, Glunz Stefan
High-efficiency p-type PERC solar cells applying PECVD ALOx layers
2010 25th EU PVSEC, Seiten: 1488 - 1491
Thomas I, Weidlich A, Johns M
IT-Gestützte Geschaftsprozesse in zukünftigen E-Mobility Szenarien
2010 VDE-Kongress 2010
Suwito D, Jäger U, Benick J, Janz S, Hermle M, Preu R, Glunz Stefan
Industtrially feasible rear side concept for n-type silicon solar cells approaching 700 mV of Voc
2010 25th EU PVSEC, Seiten: 1443 - 1445
Hopman S, Fell A, Mesec M, Kluska S, Fleischmann C, Granek F, Glunz Stefan
Influence of concentration of phosphorus dopant liquid and pulse distance on parameters of LCP selective emitters for silicon solar cells
2010 25th EU PVSEC, Seiten: 1727 - 1731
Ebong A, Renshaw J, Rounsaville B, Cooper I, Tate K, Rohatgi A, Glunz Stefan, Horteis M, Mette A, Gundemann M, Dovrat M, Kritchman E, Brusilovsky D, Benichou A
Ink jetted seed and plated grid solar cells with homogeneous high sheet resistance emitters
2010 25th EU PVSEC, Seiten: 2390 - 2394
Glunz S, Benick J, Biro D, Bivour M, Hermle M, Pysch D, Rauer M, Reichel C, Richter A, Rüdiger M, Schmiga C, Suwito D, Wolf A, Preu R
N-type silicon - enabling efficiencies \textgreater 20% in industrial production
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 50 - 56
Glunz Stefan, Benick J, Biro D, Bivour M, Hermle M, Pysch D, Rauer M, Reichel C, Richter A, Rüdiger M, Schmiga C, Suwito D, Wolf A, Preu R
N-type silicon - enabling efficiencies \textgreater 20% in industrial production
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 000050 - 000056
Bivour M, Meinhardt C, Pysch D, Reichel C, Ritzau K.-U., Hermle M, Glunz Stefan
N-type silicon solar cells with amorphous/crystalline silicon heterojunction rear emitter
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 001304 - 001308
Rüdiger M, Schmiga C, Rauer M, Hermle M, Glunz Stefan
Optimisation of industrial n-type silicon solar cells with aluminium-alloyed rear emitter by means of 2D numerical simulation
2010 25th EU PVSEC, Seiten: 2280 - 2286
Meinhardt C, Pysch D, Bivour M, Zimmermann K, Schetter C, Hermle M, Glunz Stefan
Optimization and analysis of deposition processes of amorphous silicon for silicon heterojunction solar cells
2010 25th EU PVSEC, Seiten: 1810 - 1815
Richter A, Hörteis M, Benick J, Hermle M, Glunz Stefan
Seed layer printed contact formation for highly doped boron emitters of n-type silicon solar cells with front side junction
2010 2nd Workshop on Metallization Constance, Seiten: 26 - 31
Gradmann R, Löper P, Künle M, Rothfelder M, Janz S, Hermle M, Glunz Stefan
Silicon nanocrystals in SiC: The influence of doping on crystallisation and electrical properties
2010 25th EU PVSEC, Seiten: 199 - 202
Löper P, Hiller D, Künle M, Gradmann R, Janz S, Hermle M, Zacharias M, Glunz Stefan
Silicon quantum dot superstructures for all-silicon tandem solar cells: Electrical and optical characterization
2010 22nd Workshop on Quantum Solar Energy Conversion Brigels
Rauer M, Schmiga C, Meyer K, Lossen J, Krokoszinski H.-J., Hermle M, Glunz Stefan
Simplifying the manufacturing of n-type silicon solar cells with screen-printed aluminium-alloyed rear emitter
2010 25th EU PVSEC, Seiten: 1460 - 1464
Richter A, Hoteis M, Benick J, Henneck S, Hermle M, Glunz Stefan
Towards industrially feasible high-efficiency n-type Si solar cells with boron-diffused front side emitter - combining firing stable Al2O3 passivation and fine-line printing
2010 35th IEEE Photovoltaic Specialists Conference Honolulu, Seiten: 3587 - 3592
Hiermaier, S., Riedel, W., Thoma, K.
Tragwerke unter Anprall und Explosion - Experimentelle und numerische Methoden zur Auslegung
2010 Zuverlaessigkeit und Robustheit von Tragwerken. 14. Dresdner Baustatik-Seminar 2010, Technische Universitaet Dresden, Dresden
Riedel, W., Hiermaier, S., Thoma, K.
Transient stress and failure analysis of impact experiments with ceramics
2010 3rd International Conference on Science and Technology of Advanced Ceramics, STAC 2009, Elsevier, Amsterdam, Seiten: 139 - 147
KurzfassungAt Ernst-Mach-Institut (EMI), ductile and brittle materials are studied both experimentally and numerically with the focus on shock and impact loading and associated damage effects. Experimental investigations using plate impact, edge-on impact, penetration and perforation on light gas accelerators provide input for numerical studies and allow verification of constitutive models. Hydrocodes are the standard numerical tool for the simulation of transient processes and basis of the modelling in the present paper. Besides use of commercial codes with mesh-based Lagrangean and Eulerian spatial discretization, an own meshfree SPH code has been developed at EMI. Edge-on impact experiments, plate impact tests and deep penetration in confined targets are simulated to study different loading histories and failure conditions. Significantly different material models based on continuum damage approaches as well as microstatistical modelling of inhomogeneities have been implemented. Their performances in reproducing damage fracture patterns and continued fragment loading in different ceramic types are analysed and compared to edge-on impact experiments.
Riedel, W., Hiermaier, S., Thoma, K.
Transient stress and failure analysis of impact experiments with ceramics
2010 3rd International Conference on Science and Technology of Advanced Ceramics, STAC 2009, Elsevier, Amsterdam, Seiten: 139 - 147
KurzfassungAt Ernst-Mach-Institut (EMI), ductile and brittle materials are studied both experimentally and numerically with the focus on shock and impact loading and associated damage effects. Experimental investigations using plate impact, edge-on impact, penetration and perforation on light gas accelerators provide input for numerical studies and allow verification of constitutive models. Hydrocodes are the standard numerical tool for the simulation of transient processes and basis of the modelling in the present paper. Besides use of commercial codes with mesh-based Lagrangean and Eulerian spatial discretization, an own meshfree SPH code has been developed at EMI. Edge-on impact experiments, plate impact tests and deep penetration in confined targets are simulated to study different loading histories and failure conditions. Significantly different material models based on continuum damage approaches as well as microstatistical modelling of inhomogeneities have been implemented. Their performances in reproducing damage fracture patterns and continued fragment loading in different ceramic types are analysed and compared to edge-on impact experiments.
Goldschmidt J, Fischer S, Löper P, Krämer K, Biner D, Hermle M, Glunz Stefan
Upconversion to enhance silicon solar cell efficiency - detailed experimental analysis with both coherent monochromatic irradiation and white light illumination
2010 25th EU PVSEC, Seiten: 229 - 233

2009

nach oben zur Jahresübersicht

Hess, S, Di Lauro, P, Oliva, A, Hanby, V
RefleC – A new Collector for Solar Cooling Applications with Operating Temperatures up to 150 °C
2009 Proceedings of the 3rd International OTTI-Conference on Solar Air-Conditioning /Palermo
Hess, S, Di Lauro,P, Oliva, A, Hanby, V
RefleC – Ein verbesserter Flachkollektor mit externen Reflektoren zur Erzeugung von Prozess-wärme bis 150 °C
2009 Proceedings of the 19. OTTI-Symposium Thermische Solarenergie / Bad Staffelstein
Hess, S, Heimsath, A
Raytracing-Untersuchungen zur Entwicklung und Optimierung von Prozesswärmekollektoren
2009 Erste Solarthermie-Technologiekonferenz / Berlin.
Reiterer, A., Hassan, T., El-Sheimy, N.
A Mobile Mapping System for the Automated Extraction of Relevant Image Data
2009 6th International Symposium on Mobile Mapping Technology, Sao Paulo, Brazil
Alemán M, Bay N, Barucha D, Knorz A, Biro D, Preu R, Glunz Stefan
Advances in electroless nickel plating for the metallization of silicon solar cells using different structuring techniques for the ARC
2009 24th EU PVSEC, Seiten: 1414 - 1418
Richter A, Benick J, Hermle M, Glunz Stefan
Amorphous silicon passivation applied to the front side boron emitter of n-type silicon solar cells
2009 24th EU PVSEC, Seiten: 1534 - 1538
Kluska S, Granek F, Rüdiger M, Hermle M, Glunz Stefan
Characterization and modeling of back-contact back-junction silicon solar cells
2009 24th EU PVSEC, Seiten: 950 - 954
Rodofili A, Hopman S, Fell A, Mayer K, Mesec M, Granek F, Glunz Stefan
Characterization of doping via laser chemical processing (LCP)
2009 24th EU PVSEC, Seiten: 1727 - 1731
Fritsch, J., Hiermaier, S., Strobl, G.
Characterizing and modeling the non-linear visco-elastoplastic tensile deformation properties of a glass fiber reinforced polypropylene
2009 DYFP 2009, the 14th International Conference on Deformation, Yield and Fracture of Polymers. Book of abstracts, Technische Universiteit Eindhoven, Eindhoven, Seiten: 187 - 190
Fritsch, J., Hiermaier, S., Strobl, G.
Characterizing and modeling the non-linear viscoelastic tensile deformation of a glass fiber reinforced polypropylene
2009 Sixteenth International Conference on Composite Materials with Regular Papers, ICCM 2007, Elsevier, Amsterdam, Seiten: 2460 - 2466
KurzfassungOn the basis of comprehensive experimental investigations on a long glass fiber reinforced polypropylene (PP-LGF) a novel rheological material model is developed. It features a decomposition of the stress into a time independent quasi-static and a time and strain dependent viscous contribution. Furthermore it allows for plastic deformations starting from the very beginning of straining and is thereby able to reproduce the absence of a purely linear elastic domain going along with the nonexistence of a defined yield point, characteristic for many fiber reinforced thermoplastic polymers. In order to approach the true quasi-static material behavior, various tensile tests were carried out. The viscous material behavior was deduced from a series of stress relaxation experiments and is described by Eyring's equation with strain dependent viscosity parameters.
Fritsch, J., Hiermaier, S., Strobl, G.
Characterizing and modeling the non-linear viscoelastic tensile deformation of a glass fiber reinforced polypropylene
2009 Sixteenth International Conference on Composite Materials with Regular Papers, ICCM 2007, Elsevier, Amsterdam, Seiten: 2460 - 2466
KurzfassungOn the basis of comprehensive experimental investigations on a long glass fiber reinforced polypropylene (PP-LGF) a novel rheological material model is developed. It features a decomposition of the stress into a time independent quasi-static and a time and strain dependent viscous contribution. Furthermore it allows for plastic deformations starting from the very beginning of straining and is thereby able to reproduce the absence of a purely linear elastic domain going along with the nonexistence of a defined yield point, characteristic for many fiber reinforced thermoplastic polymers. In order to approach the true quasi-static material behavior, various tensile tests were carried out. The viscous material behavior was deduced from a series of stress relaxation experiments and is described by Eyring's equation with strain dependent viscosity parameters.
Pysch D, Bivour M, Zimmermann K, Schetter C, Hermle M, Glunz Stefan
Comprehensive study of different PECVD-deposition methods for deposition of thin intrinsic amorphous silicon for heterojunction solar cells
2009 24th EU PVSEC, Seiten: 1580 - 1585
Goldschmidt J, Peters M, Dimroth F, Bett A, Steidl L, Zentel R, Hermle M, Glunz Stefan, Willeke G
Developing large and efficient fluorescent concentrator systems
2009 24th EU PVSEC, Seiten: 207 - 212
Hörteis M, Bartsch J, RAdtke V, Filipovic A, Glunz Stefan
Different aspects of seed layer-printed and light-induced plated front side contacts
2009 24th EU PVSEC, Seiten: 985 - 988
Filipovic A, Binder S, Hörteis M, Schmidt D, Merkel J, Glunz Stefan
Electrical properties of aerosol printed contacts
2009 24th EU PVSEC, Seiten: 1475 - 1478
Bay N, RAdtke V, Alemán M, Bartsch J, Glunz Stefan
Electrolytic nickel deposition for the front side metallization of silicon solar cells
2009 24th EU PVSEC, Seiten: 1434 - 1436
Schmich E, Kiefer F, Hörteis M, Alemán M, Glunz Stefan, Reber S
Emitter epitaxy for crystalline silicon thin film solar cells with new contact methods
2009 24th EU PVSEC, Seiten: 2570 - 2574
Horteis M, Grote D, Binder S, Filipovic A, Schmidt D, Glunz Stefan
Fine line printed and plated contacts on high ohmic emitters enabling 20% cell efficiency
2009 34th IEEE Photovoltaic Specialists Conference Philadelphia, Seiten: 000060 - 000065
Benick J, Hoex B, Dingemans G, Richter A, Hermle M, Glunz Stefan
High-efficiency n-type silicon solar cells with front side boron emitter
2009 24th EU PVSEC, Seiten: 863 - 870
Suwito D, Janz S, Hermle M, Glunz Stefan
High-efficiency silicon solar cells with intrinsic and doped A-SiCx rear side passivation
2009 24th EU PVSEC, Seiten: 2197 - 2202
Hauser H, Voisin P, Guttowski A, Mick J, Pfeifer M, Müller C, Hermle M, Glunz Stefan, Bläsi B
Honeycomb textured multicrystalline silicon via nanoimprint lithography
2009 24th EU PVSEC, Seiten: 1118 - 1122
Weidlich A, Karnouskos S, Kok K, Warmer C
Integrating smart houses with the smart grid through web services for increasing energy efficiency
2009 10th IAEE European Conference, Vienna, Austria
Schmiga C, Hörteis M, Rauer M, Meyer K, Lossen J, Krokoszinski H.-J., Hermle M, Glunz Stefan
Large-area n-type silicon solar cells with printed contacts and aluminium-alloyed rear emitter
2009 24th EU PVSEC, Seiten: 1167 - 1170
Knorz A, Aleman M, Grohe A, Preu R, Glunz Stefan
Laser ablation of antireflection coatings for plated contacts yielding solar cell efficiencies above 20 %
2009 24th EU PVSEC, Seiten: 1002 - 1005
Voisin P, Peters M, Hauser H, Helgert C, Kley E.-B., Pertsch T, Bläsi B, Hermle M, Glunz Stefan
Nanostructured back side silicon solar cells
2009 24th EU PVSEC, Seiten: 1997 - 2000
Hofmann M, Saint-Cast P, Suwito D, Seiffe J, Schmidt C, Kambor S, Gautero L, Kohn N, Nekarda J.-F., Leimenstoll A, Wagenmann D, Erath D, Catoir J, Wolke W, Janz S, Biro D, Grohe A, Rentsch J, Glunz Stefan, Preu R
Overview on crystalline silicon solar cells using PECVD rear passivation and laser-fired contacts
2009 24th EU PVSEC, Seiten: 1517 - 1522
Rauer M, Schmiga C, Hermle M, Glunz Stefan
Passivation of screen-printed aluminium-alloyed emitters for back junction n-type silicon solar cells
2009 24th EU PVSEC, Seiten: 1059 - 1062
Roth T, Rosenits P, Warta W, Glunz Stefan
Photoconductance-based excess carrier lifetime measurements on unpassivated silicon samples
2009 24th EU PVSEC, Seiten: 2004 - 2007
Goldschmidt J, Fischer S, Löper P, Peters M, Steidl L, Hermle M, Glunz Stefan
Photon management with luminescent materials
2009 21st Workshop on Quantum Solar Energy Conversion Rauris
Janz S, Voisin P, Suwito D, Peters M, Hermle M, Glunz Stefan
Photonic crystals as rear-side diffusers and reflectors for high efficiency silicon solar cells
2009 24th EU PVSEC, Seiten: 1529 - 1533
Pysch D, Ziegler J, Becker J.-P., Suwito D, Janz S, Glunz Stefan, Hermle M
Potentials and development of amorphous silicon carbide heterojunction solar cells
2009 34th IEEE Photovoltaic Specialists Conference Philadelphia, Seiten: 794 - 799
Bartsch J, RAdtke V, Savio C, Glunz Stefan
Progress in understanding the current paths and deposition mechanisms of light-induced plating and implications for the process
2009 24th EU PVSEC, Seiten: 1469 - 1474
Rosenits P, Kopp F, Roth T, Warta W, Reber S, Glunz Stefan
Quasi-steady-state photoconductance measurements on crystalline silicon thin-film material
2009 24th EU PVSEC, Seiten: 2103 - 2106
Löper P, Hartel A, Künle M, Hiller D, Janz S, Hermle M, Zacharias M, Glunz Stefan
Silicon quantum dot absorber layers for all-silicon tandem solar cells: Optical and electrical characterisation
2009 24th EU PVSEC, Seiten: 434 - 438
Löper P, Künle M, Hartel A, Goldschmidt J, Peters M, Janz S, Hermle M, Glunz Stefan, Zacharias M
Silicon quantum dot superstructures for all-silicon tandem solar cells
2009 21st Workshop on Quantum Solar Energy Conversion Rauris
Kok K, Karnouskos S, Nestle D, Dimeas A, Weidlich A, Warmer C, Strauss P, Buchholz B, Drenkard S, Hatziargyriou N
Smart houses for a smart grid
2009 20th International Conference and Exhibition on Electricity Distribution CIRED, Seiten: 1 - 4
Granek F, Reichel C, Glunz Stefan
Stability of front surface passivation of back-contact back-junction silicon solar cells under UV illumination
2009 24th EU PVSEC, Seiten: 1047 - 1050
Suwito D, Fernandez J, Janz S, Dimroth F, Glunz Stefan
The influence of annealing on the passivation quality of A-SiCX:H on crystalline silicon and germanium surfaces: H on crystalline silicon and germanium surfaces
2009 34th IEEE Photovoltaic Specialists Conference Philadelphia, Seiten: 000700 - 000704
Reiterer, A.
Traffic Sign Detection from Geo-Referenced Mobile Mapping Images
2009 GPS World Tech Talk
Warmer C, Kok K, Karnouskos S, Weidlich A, Nestle D, Selzam P, Ringelstein J, Dimeas A, Drenkard S
Web services for integration of smart houses in the smart grid
2009 Denver Grid-Interop Conference

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Pysch D, Leimenstoll A, Hermle M, Glunz Stefan
Wet-chemical pre-treatment of c-Si substrates enhancing the performance of a-SiC: H/c-Si heterojunction solar cells
2009 24th EU PVSEC, Seiten: 1123 - 1127

2008

nach oben zur Jahresübersicht

Hess, S, Di Lauro, P, Rose, S, Rommel, M
Comparison of Medium Temperature Collectors for the Generation of Process Heat
2008 proceedings of EuroSun 2008. Solar Collector Technology / Lisbon.
Hess, S, Di Lauro, P, Rose, S, Rommel, M
Raytracing-Untersuchungen für die Entwicklung von Prozesswärmekollektoren
2008 Proceedings of the 18. OTTI-Symposium Thermische Solarenergie / Bad Staffelstein
Goldschmidt J, Loper P, Fischer S, Janz S, Peters M, Glunz Stefan, Willeke G, Lifshitz E, Kramer K, Biner D
Advanced upconverter systems with spectral and geometric concentration for high upconversion efficiencies
2008 2008 Conference on Optoelectronic and Microelectronic Materials and Devices, Seiten: 307 - 311
Peters C, Engelhart P, Hlusiak M, Wade R, Jesswein R, Rychtarik D, Müller J, Ulzhöfer C, Spätlich S, Neubert T, Schmiga C, Kray D, Grohe A, Glunz Stefan
Alba-development of high-effciency multi-crystalline si ewt solar cells for industrial fabrication at q-cells
2008 23rd EU PVSEC, Seiten: 1010 - 1013
Janz S, Ziegler J, Pysch D, Suwito D, Glunz Stefan
Amorphous silicon carbide hetero-emitters for high efficiency silicon solar cells
2008 23rd EU PVSEC, Seiten: 1720 - 1723
Weidlich A, Veit D
Analyzing interrelated markets in the electricity sector -- The case of wholesale power trading in Germany
2008 IEEE Power and Energy Society General Meeting, Pittsburgh, Seiten: 1 - 8

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Ryan, S., Schaefer, F., Guyot, M., Hiermaier, S., Lambert, M.
Characterizing the transient response of CFRP/Al HC spacecraft structures induced by space debris impact at hypervelocity
2008 Hypervelocity impact. Proceedings of the 2007 symposium, Elsevier, Amsterdam, Seiten: 1756 - 1763
KurzfassungTo quantify the disturbance induced by the impact of micrometeoroid and space debris particles at hypervelocity on vibration-sensitive CFRP/Al HC SP satellite platforms a method is presented which uses experimentally validated hydrocode models to characterize the impact-induced transient wave in the local structure. Key features of the transient waveform are simplified by a mathematical function which is expressed in terms of impactor momentum. Evolution of the transient waveform is characterized using multiple measurement gauges located on the sandwich panel facesheets outside the area of mechanical damage. The characterization is then used to extrapolate the elastic waveform back to the impact location. The elastic-equivalent excitation of a CFRP/Al HC SP is defined in terms of force with respect to time for application in finite element: structural codes for propagation of the local disturbance to vibration-sensitive locations (i.e. measurement devices).
Ryan, S., Schaefer, F., Guyot, M., Hiermaier, S., Lambert, M.
Characterizing the transient response of CFRP/Al HC spacecraft structures induced by space debris impact at hypervelocity
2008 Hypervelocity impact. Proceedings of the 2007 symposium, Elsevier, Amsterdam, Seiten: 1756 - 1763
KurzfassungTo quantify the disturbance induced by the impact of micrometeoroid and space debris particles at hypervelocity on vibration-sensitive CFRP/Al HC SP satellite platforms a method is presented which uses experimentally validated hydrocode models to characterize the impact-induced transient wave in the local structure. Key features of the transient waveform are simplified by a mathematical function which is expressed in terms of impactor momentum. Evolution of the transient waveform is characterized using multiple measurement gauges located on the sandwich panel facesheets outside the area of mechanical damage. The characterization is then used to extrapolate the elastic waveform back to the impact location. The elastic-equivalent excitation of a CFRP/Al HC SP is defined in terms of force with respect to time for application in finite element: structural codes for propagation of the local disturbance to vibration-sensitive locations (i.e. measurement devices).
Reichel C, Granek F, Benick J, Schultz-Wittmann O, Glunz Stefan
Comparison of emitter saturation current densities determined by quasi-steady-state photoconductance measurements of effective carrier lifetimes at high and low injections
2008 23rd EU PVSEC, Seiten: 1664 - 1669
Roth T, Rosenits P, Rüdiger M, Warta W, Glunz Stefan
Comparison of photoconductance- and photo-luminescence-based lifetime measurement techniques
2008 2008 Conference on Optoelectronic and Microelectronic Materials and Devices, Seiten: 249 - 252
Reiterer, A., Lehmann, M., Miljanovic, M., Ali, H., Paar, G., Egly, U., Eiter, T., Kahmen, H.
Deformation Monitoring Using a New Kind of Optical 3D Measurement: Components and Perspectives
2008 13th FIG International Symposium on Deformation Measurements and Analysis / 4th IAG Symposium on Geodesy for Geotechnical and Structural Engineering, Lissabon
Suwito D, Roth T, Pysch D, Korte L, Richter A, Janz S, Glunz Stefan
Detailed study on the passivation mechanism of a-SixC1-x for the solar cell rear side
2008 23rd EU PVSEC, Seiten: 1023 - 1028
Woehl R, Hörteis M, Glunz Stefan
Determination of the effective optical width of screen-printed and aerosol-printed and plated fingers
2008 23rd EU PVSEC, Seiten: 1377 - 1382
Goldschmidt J, Peters M, Dimroth F, Glunz Stefan, Willeke G
Efficiency enhancement of fluorescent concentrators with photonic structures and material combinations
2008 23rd EU PVSEC, Seiten: 193 - 197
Reiterer, A., Lehmann, M., Miljanovic, M., Ali, H., Paar, G., Egly, U., Eiter, T., Kahmen, H.
Ein lernendes 3D Deformations-Messsystem
2008 Pangeo Austria, Wien
Rublack T, Alemán M, Glunz Stefan
Evaluation of the laser melting process of different materials for the front-side metallisation of silicon solar cells
2008 23rd EU PVSEC, Seiten: 1419 - 1421
Granek F, Hermle M, Reichel C, Schultz-Wittmann O, Glunz Stefan
High- efficiency back-contact back-junction silicon solar cell research at Fraunhofer ISE
2008 23rd EU PVSEC, Seiten: 991 - 995
Hiermaier, S.
Hydrocodes - Simulation tool of choice for transient processes
2008 3. Workshop "Bau-Protect" Buildings and Utilities Protection, Universit�t der Bundeswehr Muenchen, Institut fuer Mechanik und Statik, Neubiberg, Seiten: 21 - 22
Hörteis M, Richter P, Glunz Stefan
Improved front side metallization by aerosol jet printing of hotmelt INKS
2008 23rd EU PVSEC, Seiten: 1402 - 1405
Roth T, Hohl-Ebinger J, Schmich E, Warta W, Glunz Stefan, Sinton R
Improving the accuracy of Suns-VOC measurements using spectral mismatch correction
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 5
Alemán M, Bay N, Gautero J, Specht J, Stüwe D, Neubauer R, Baurcha D, Biro D, Rentsch J, Glunz Stefan, Preu R
Industrially feasible front-side metallization based on ink-jet masking and nickel plating
2008 23rd EU PVSEC, Seiten: 1953 - 1956
Eichhorn, A., Fabiankowitsch, J., Haberler-Weber, M., Reiterer, A.
Investigation of Dynamic Thermal Effects with Non-Parametric and 'Parametric' Deformation Models
2008 13th FIG International Symposium on Deformation Measurements and Analysis / 4th IAG Symposium on Geodesy for Geotechnical and Structural Engineering, Lissabon
Kray D, Aleman M, Fell A, Hopman S, Mayer K, Mesec M, Muller R, Willeke G, Glunz Stefan, Bitnar B, Neuhaus D.-H., Ludemann R, Schlenker T, Manz D, Bentzen A, Sauar E, Pauchard A, Richerzhagen B
Laser-doped silicon solar cells by laser chemical processing (LCP) exceeding 20% efficiency
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 3
Rudolph D, Alemán M, Bay N, Mayer K, Glunz Stefan
Laser-induced nickel deposition from an aqueous electrolyte for the front-side metallization of silicon solar cells
2008 23rd EU PVSEC, Seiten: 1427 - 1430
Rosenits P, Roth T, Reber S, Warta W, Glunz Stefan
Lifetime studies on crystalline silicon thin-films by photoluminescence measurements
2008 23rd EU PVSEC, Seiten: 2224 - 2227
Rodofili A, Fell A, Hopman S, Mayer K, Willeke G, Kray D, Glunz Stefan
Local p-type back surface fields via laser chemical processing (LCP): First experiments
2008 23rd EU PVSEC, Seiten: 1808 - 1811
Kluska S, Granek F, Hermle M, Glunz Stefan
Loss analysis of high-efficiency back-contact back-junction silicon solar cells
2008 23rd EU PVSEC, Seiten: 1590 - 1595
Fischer S, Goldschmidt J, Löper P, Janz S, Peters M, Glunz Stefan, Kigel A, Lifshitz E, Krämer K
Material characterization for advanced upconverter systems
2008 23rd EU PVSEC, Seiten: 620 - 623
Mayer K, Kray D, Pérez T, Schuhmann M, Glunz Stefan
New surfactants for combined cleaning and texturing of mono-crystalline silicon wafers after wire-sawing
2008 23rd EU PVSEC, Seiten: 1109 - 1113
Hiermaier, S., Gebbeken, N.
Numerical methods for dynamic processes
2008 3. Workshop "Bau-Protect" Buildings and Utilities Protection, Universit�t der Bundeswehr Muenchen, Institut fuer Mechanik und Statik, Neubiberg, Seiten: 17 - 18
Benick J, Schultz-Wittmann O, Schön J, Glunz Stefan
Passivation of boron emitters by local overcompensation with phosphorus
2008 23rd EU PVSEC, Seiten: 1550 - 1552
Mingirulli N, Trittler S, Bui M, Grohe A, Biro D, Preu R, Glunz Stefan
Passivation of laser-drilled via holes for emitter-wrap-through-cells
2008 23rd EU PVSEC, Seiten: 996 - 999
Peters M, Goldschmidt J, Löper P, Ulbrich C, Kirchartz T, Fahr S, Bläsi B, Glunz Stefan, Gombert A
Photonic structures for the application on solar cells
2008 20th Workshop on Quantum Solar Energy Conversion
Borden P, Xu L, McDougall B, Chang C, Pysch D, Voisin P, Glunz Stefan
Polysilicon tunnel junctions as alternates to diffused junctions
2008 23rd EU PVSEC, Seiten: 1149 - 1152
Granek F, Hermle M, Reichel C, Grohe A, Schultz-Wittmann O, Glunz Stefan
Positive effects of front surface field in high-efficiency back-contact back-junction n-type silicon solar cells
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 5
Weidlich A, Veit D
PowerACE: Ein agentenbasiertes Tool zur Simulation von Strom- und Emissionsmärkten
2008 IT in der Energiewirtschaft: Track Proceedings der MKWI 2008, Seite: 15
Suwito D, Janz S, Schetter C, Glunz Stefan, Roth K
Process transfer of a-SixC1-x passivation layers from a laboratorytype to an industrial in-line PECVD reactor
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 4
Glunz Stefan, Aleman M, Bartsch J, Bay N, Bayer K, Bergander R, Filipovic A, Greil S, Grohe A, Horteis M, Knorz A, Menko M, Mette A, Pysch D, RAdtke V, Richter P, Rudolph D, Rublack T, Schetter C, Schmidt D, Schultz O, Woehl R
Progress in advanced metallization technology at Fraunhofer ISE
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 4
Goldschmidt J, Peters M, Löper P, Schultz O, Dimroth F, Bett A, Gombert A, Glunz Stefan, Willeke G
Progress in photon management for full spectrum utilization with luminescent materials
2008 20th Workshop on Quantum Solar Energy Conversion
Kasemann M, Kwapil W, Walter B, Giesecke J, Michl B, The M, Wagner J.-M., Bauer J, Schütt A, Carstensen J, Kampwerth H, Gundel P, Schubert M, Bardos R, Föll H, Nagel H, Würfel P, Trupke T, Breitenstein O, Warta W, Glunz Stefan
Progress in silicon solar cell characterization with infrared imaging methods
2008 23rd EU PVSEC, Seiten: 965 - 973
Hermle M, Granek F, Schultz-Wittmann O, Glunz Stefan
Shading effects in back-junction back-contacted silicon solar cells
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 4
Fell A, Kray D, Wütherich T, Müller R, Willeke G, Glunz Stefan
Simulation of phase changes and dopant diffusion in silicon for the manufacturing of selective phosphorous emitters via laser chemical processing
2008 23rd EU PVSEC, Seiten: 272 - 274
Kasemann M, Kwapil W, Schubert M, Habenicht H, Walter B, The M, Kontermann S, Rein S, Breitenstein O, Bauer J, Lotnyk A, Michl B, Nagel H, Schutt A, Carstensen J, Foll H, Trupke T, Augarten Y, Kampwerth H, Bardos R, Pingel S, Berghold J, Warta W, Glunz Stefan
Spatially resolved silicon solar cell characterization using infrared imaging methods
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 7
Richter A, Benick J, Glunz Stefan
Spectral ellipsometry analysis of ultrathin amorphous silicon layers
2008 23rd EU PVSEC, Seiten: 1724 - 1727
Vergniaud, J.B., Guyot, M., Lambert, M., Schaefer, F., Ryan, S., Hiermaier, S., Taylor, E.
Structural vibrations induced by HVI - Application to the Gaia spacecraft
2008 Hypervelocity impact. Proceedings of the 2007 symposium, Elsevier, Amsterdam, Seiten: 1836 - 1843
KurzfassungGiven the growing stability needed for spacecraft in operation to ensure functioning of future instruments whose sensitivity requires an important technological step, perturbations encounter in orbital conditions that used to be negligible, become today an issue. This is the case of micrometeorite impacts whose energy could induce modal response of the flexible structure and imply a dynamic response of the spacecraft which could probably be disturbing for the instrument functioning. The impact environment that could be encountered by the spacecraft is preliminary studied before the definition of test to recreate the excitation with light-gas gun. Experiments are made on samples of structure representative of the ongoing Gaia astrometric mission project. Response of the structure is recorded to be correlated to finite elements model of the sample. The excitation is then extrapolated to orbital conditions and to Gaia finite elements model. The final perturbation is compared to the specification. The main conclusion is that for daily impact event, dynamic response of the structure will not disturb Gaia functioning. Nevertheless, for a yearly impact event, the astrometric mission will largely be disturbed by the dynamic response of the structure to the impact.
Vergniaud, J.B., Guyot, M., Lambert, M., Schaefer, F., Ryan, S., Hiermaier, S., Taylor, E.
Structural vibrations induced by HVI - Application to the Gaia spacecraft
2008 Hypervelocity impact. Proceedings of the 2007 symposium, Elsevier, Amsterdam, Seiten: 1836 - 1843
KurzfassungGiven the growing stability needed for spacecraft in operation to ensure functioning of future instruments whose sensitivity requires an important technological step, perturbations encounter in orbital conditions that used to be negligible, become today an issue. This is the case of micrometeorite impacts whose energy could induce modal response of the flexible structure and imply a dynamic response of the spacecraft which could probably be disturbing for the instrument functioning. The impact environment that could be encountered by the spacecraft is preliminary studied before the definition of test to recreate the excitation with light-gas gun. Experiments are made on samples of structure representative of the ongoing Gaia astrometric mission project. Response of the structure is recorded to be correlated to finite elements model of the sample. The excitation is then extrapolated to orbital conditions and to Gaia finite elements model. The final perturbation is compared to the specification. The main conclusion is that for daily impact event, dynamic response of the structure will not disturb Gaia functioning. Nevertheless, for a yearly impact event, the astrometric mission will largely be disturbed by the dynamic response of the structure to the impact.
Benick J, Hoex B, Schultz O, Glunz Stefan
Surface passivation of boron diffused emitters for high efficiency solar cells
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 5
Rüdiger M, Roth T, Warta W, Glunz Stefan
Temperature-dependent quasi-steady-state photoluminescence lifetime measurements for defect spectroscopy
2008 23rd EU PVSEC, Seiten: 1333 - 1337
Roth T, Rüdiger M, Trupke T, Glunz Stefan
Titanium-related defect levels in silicon analyzed by temperature-dependent photoluminescence lifetime spectroscopy
2008 33rd IEEE Photovoltaic Specialists Conference San Diego, Seiten: 1 - 4
Schmiga C, Hermle M, Glunz Stefan
Towards 20% efficient n-type silicon solar cells with screen-printed aluminium-alloyed rear emitter
2008 23rd EU PVSEC
RAdtke V, Bartsch J, Greil S, Schetter C, Bergander R, Glunz Stefan
Understanding the electrochemical mechanisms of light induced plating by means of voltammetric techniques
2008 23rd EU PVSEC, Seiten: 1785 - 1788
Löper P, Goldschmidt J, Fischer S, Peters M, Meijerink A, Biner D, Krämer K, Schultz-Wittmann O, Glunz Stefan, Luther J
Upconversion for silicon solar cells: Material and system characterisation
2008 23rd EU PVSEC, Seiten: 173 - 180

2007

nach oben zur Jahresübersicht

Hess, S
Application of Medium Temperature Collectors for Solar Air-Conditioning
2007 Proceedings of the 2nd International Conference on Solar Air-Conditioning /Tarragona.
Goldschmidt J, Peters M, Löper P, Schultz O, Dimroth F, Glunz Stefan, Gombert A, Willeke G
Advanced fluorescent concentrator system design
2007 22nd EU PVSEC, Seiten: 608 - 612
Glunz Stefan, Nekarda J, Mäckel H, Cuevas A
Analyzing back contacts of silicon solar cells by suns-voc-measurements at high illumination densities
2007 22nd EU PVSEC, Seiten: 849 - 853
Alemán M, Bay N, Fabritius M, Glunz Stefan
Characterization of electroless nickel plating on silicon solar cells for the front side metallization
2007 22nd EU PVSEC, Seiten: 1590 - 1592
Hofmann M, Schmidt C, Kohn N, Grambole D, Rentsch J, Glunz Stefan, Preu R
Detailed analysis of amorphous silicon passivation layers deposited in industrial in-line and laboratory-type pecvd reactors
2007 22nd EU PVSEC, Seiten: 1528 - 1531
Pysch D, Mette A, Filipovic A, Glunz Stefan
Detailed analysis of fine line printed and plated solar cell contacts
2007 22nd EU PVSEC, Seiten: 1238 - 1243
Rosenits P, Roth T, Diez S, Macdonald D, Glunz Stefan
Detailed studies of manganese in silicon using lifetime spectroscopy and deep-level transient spectroscopy
2007 22nd EU PVSEC, Seiten: 1480 - 1483
Würfel P, Trupke T, Rüdiger M, Puzzer T, Schäffer E, Warta W, Glunz Stefan
Diffusion lengths of silicon solar cells from luminescence images
2007 22nd EU PVSEC, Seiten: 390 - 393
Löper P, Goldschmidt J, Peters M, Biner D, Krämer K, Schultz O, Glunz Stefan, Luther J
Efficient upconversion systems for silicon solar cells
2007 22nd EU PVSEC, Seiten: 589 - 594
Huberth, F., Hiermaier, S.
Experimental parameter identification for material models including deformation induced volume dilation for thermoplastic materials
2007 Experimental Analysis of Nano and Engineering Materials and Structures. Proceedings of the 13th International Conference on Experimental Mechanics 2007, Springer Netherland, Dordrecht, Seiten: 293 - 294
KurzfassungSimulation of structures made from thermoplastic materials under crash loads including large deformations and failure is still a challenge for most existing numerical tools. To model the complex mechanical behaviour of thermoplastic materials new models have been developed. To reproduce the mechanical behaviour in the simulation, model parameters for each material have to be identified by experimental testing.
Hofmann M, Kambor S, Schmidt C, Grambole D, Rentsch J, Glunz Stefan, Preu R
Firing stable surface passivation using all-PECVD stacks of SiOx: H and SiNx:H
2007 22nd EU PVSEC, Seiten: 1030 - 1033
Granek F, Reichel C, Hermle M, Huljic D, Schultz O, Glunz Stefan
Front surface passivation of n-type high-efficiency back-junction silicon solar cells using front surface field
2007 22nd EU PVSEC, Seiten: 1454 - 1457
Hörteis M, Mette A, Richter P, Fidorra F, Glunz Stefan
Further progress in metal aerosol jet printing for front side metallization of silicon solar cells
2007 22nd EU PVSEC, Seiten: 1039 - 1042
Rüdiger M, Trupke T, Würfel P, Roth T, Glunz Stefan
Influence of photon reabsorption on temperature dependent quasi-steady-state photoluminescence lifetime measurements on crystalline silicon
2007 22nd EU PVSEC, Band: 92
Grohe A, Wütherich T, Knorz A, Nekarda J, Mingirulli N, Harmel C, Preu R, Glunz Stefan
Laser processes for the industrial production of high efficiency silicon solar cells
2007 22nd EU PVSEC, Seiten: 1751 - 1754
Jimeno J, Bueno G, Lago R, Freire I, Pérez L, Recart F, Hoces I, Azkona N, Alonso J, Sánchez-Friera P, Glunz Stefan, Emanuel G, Ruiz R, Pohl A, Wolke W, Schubert M
Low cost using ultra-thin bifacial cells
2007 22nd EU PVSEC, Seiten: 875 - 878
Janz S, Suwito D, Glunz Stefan
Passivation mechanisms of amorphous SixC1-x layers on highly doped and textured Si surfaces
2007 22nd EU PVSEC, Seiten: 1454 - 1457
Roth T, Rüdiger M, Rosenits P, Diez S, Trupke T, Bardos R, Glunz Stefan
Photoluminescence lifetime spectroscopy surface recombination analysis
2007 22nd EU PVSEC, Seiten: 1002 - 1005
Goldschmidt J, Peters M, Löper P, Glunz Stefan, Gombert A, Willeke G
Photon management for full spectrum utilization with fluorescent materials
2007 19th Workshop on Quantum Solar Energy Conversion
Kray D, Fell A, Hopman S, Mayer K, Mesec M, Glunz Stefan, Willeke G
Progress in laser chemical processing (LCP) for innovative solar cell microstructuring and wafering applications
2007 22nd EU PVSEC, Seiten: 1227 - 1230
Trupke T, Bardos R, Abbott M, Würfel P, Pink E, Augarten Y, Chen F, Fisher K, Cotter J, Kasemann M, Rüdiger M, Kontermann S, Schubert M, The M, Glunz Stefan, Warta W, Macdonald D, Tan J, Cuevas A, Bauer J, Gupta R, Breitenstein O, Buonassisi T, Tarnowski G, Lorenz A, Hartmann H, Neuhaus D, Fernandez J
Progress with luminescence imaging for the characterisation of silicon wafers and solar cells
2007 22nd EU PVSEC, Seiten: 22 - 31
Schultz O, Mette A, Preu R, Glunz Stefan
Silicon solar cells with screen-printed front side metallization exceeding 19% efficiency
2007 22nd EU PVSEC, Seiten: 980 - 983
Allardyce G, Cahalen J, Rasch J, Ridler T, Weigel O, Frőhlich H, Kappler H, Oberholtzer F, Rattey C, Mette A, Schetter C, Glunz Stefan
The commercial application of light induced electroplating for improving the efficiency of crystalline silicon solar cells
2007 22nd EU PVSEC, Seiten: 1578 - 1580
Hiermaier, S., Wicklein, M.
Zellulare Werkstoffe in der Crashsimulation : Charakterisierung und numerische Simulation
2007 Polyurethan 2007. Automotive - Bauen - Daemmen - Komfort - Struktur, VDI Verlag, Duesseldorf

2006

nach oben zur Jahresübersicht

Mason N, Schultz O, Russell R, Glunz Stefan, Warta W
20.1% efficient large area cell on 140 micron thin silicon wafer
2006 21st EU PVSEC, Seiten: 521 - 523
Hofmann M, Glunz Stefan, Preu R, Willeke G
21%-efficient silicon solar cells using amorphous silicon rear side passivation
2006 21st EU PVSEC, Seiten: 609 - 613
Goldschmidt J, Glunz Stefan, Gombert A, Willeke G
Advanced fluorescent concentrators
2006 21st EU PVSEC, Seiten: 107 - 110
Janz S, Reber S, Glunz Stefan
Amorphous sic: Applications for silicon solar cells
2006 21st EU PVSEC, Seiten: 660 - 663
Ryan, S., Schaefer, F., Spencer, G., Hiermaier, S., Guyot, M., Lambert, M.
An excitation function for hypervelocity impact-induced wave propagation in satellite structures
2006 57th International Astronautical Congress, IAC 2006, Curran, Red Hook, NY, Seiten: 3838 - 3846
KurzfassungAn empirical excitation function which defines the elastic excitation of a satellite wall-representative Aluminum plate from impact of a projectile at hypervelocity is derived empirically from experimentally validated hydrocode simulations. The resulting function is intended for application in a structural finite element model code to assess the perturbation effects of small micrometeoroid and space debris impacts on highly stiffened satellite structures. This will enable the risk that these impacts pose on a future generation of ESA scientific satellite missions employing ultra-sensitive equipment to be quantified. The excitation function has been empirically derived from simulated velocity measurements made at various offsets from the impact location. The measured velocity waveforms have been simplified in terms of its frequency content in mind of its end-point application in structural codes, and this simplified velocity waveform has been extrapolated to the impact o rigin. The resulting empirical function is polynomial-exponential decay in form, and defines a point-source velocity-time input for structural codes.
Diez S, Rein S, Roth T, Glunz Stefan
Analyzing defects by temperature- and injection-dependent lifetime measurements
2006 21st EU PVSEC, Seiten: 1215 - 1219
Weidlich A, Veit D
Bidding in Interrelated Day-Ahead Electricity Markets --Insights from an Agent-Based Simulation Model
2006 Proceedings of the 29th IAEE international conference, Potsdam
Grohe A, Fleischhauer B, Preu R, Glunz Stefan, Willeke G
Boundary conditions for the industrial production of LFC cells
2006 4th World Conference on Photovoltaic Energy Conversion Hawaii, Seiten: 1032 - 1035
Grohe A, Catoir J, Fleischhauer B, Preu R, Glunz Stefan, Willeke G, Schneiderlöchner E, Lüdemann R, Liu J, Schramm S, Trassl R, Wieder S
Boundary conditions for the industrial production of lfc cells results from the joint project inka
2006 21st EU PVSEC, Seiten: 1101 - 1104
Boljen, M., Harwick, W., Rohr, I., Hiermaier, S.
Characterisation and numerical simulation of twill and satin weaves of fabrics made of p-Aramid under static and dynamic loading
2006 DYMAT 2006, 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, EDP Sciences, Les Ulis, Seiten: 345 - 352
KurzfassungThe aim of this work is to numerically model two representative twill and satin weaves on a mesoscopical level in order to reveal weave specific yarn interactions. These mesoscopical models that explicitly depict each participating yarn are subjected to uniaxial tension, quasi-static biaxial tension and pure shear loading. The material response of both weaves will be investigated and compared to experimental results performed earlier by Rohr and Harwick.
Boljen, M., Harwick, W., Rohr, I., Hiermaier, S.
Characterisation and numerical simulation of twill and satin weaves of fabrics made of p-Aramid under static and dynamic loading
2006 DYMAT 2006, 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, EDP Sciences, Les Ulis, Seiten: 345 - 352
KurzfassungThe aim of this work is to numerically model two representative twill and satin weaves on a mesoscopical level in order to reveal weave specific yarn interactions. These mesoscopical models that explicitly depict each participating yarn are subjected to uniaxial tension, quasi-static biaxial tension and pure shear loading. The material response of both weaves will be investigated and compared to experimental results performed earlier by Rohr and Harwick.
Huljic D, Zerres T, Mohr A, Maydell K, Petter K, Müller J, Feist H, Harder N.-P., Engelhart P, Brendemühl T, Grischke R, Meyer R, Brendel R, Granek F, Grohe A, Hermle M, Schultz O, Glunz Stefan
Development of a 21 % back-contact monocrystalline silicon solar cell for large-scale production
2006 21st EU PVSEC, Seiten: 765 - 768
Schultz O, Rentsch J, Grohe A, Glunz Stefan, Willeke G
Dielectric rear surface passivation for industrial multicrystalline silicon solar cells
2006 4th World Conference on Photovoltaic Energy Conversion Hawaii, Seiten: 885 - 889
Cames M, Weidlich A
Emissions trading and innovation in the German electricity industry -- Impact of possible design options for an emissions trading scheme on innovation strategies in the German electricity industry
2006 Springer Science and Business Media, Seiten: 39 - 51
Schultz O, Glunz Stefan, Riepe S, Willeke G
Gettering of multicrystalline silicon for high-efficiency solar cells
2006 21st EU PVSEC, Seiten: 788 - 791
Schultz O, Glunz Stefan, Warta W, Preu R, Grohe A, Köber M, Willeke G, Russel R, Fernandez J, Morilla C, Bueno R, Vincueria I
High-efficiency solar cells with laser-grooved buried contact front and laser-fired rear for industrial production
2006 21st EU PVSEC, Seiten: 826 - 829
Hiermaier, S.
Hydrocodes - Simulation transienter Vorgaenge mit expliziter Zeitintegration
2006 2. Workshop "BAU-PROTECT" 2006. Sicherheit der baulichen Infrastruktur vor au�ergewoehnlichen Einwirkungen, Univ. der Bundeswehr Muenchen, Muenchen
Mette A, Schetter C, Wissen D, Lust S, Glunz Stefan, Willeke G
Increasing the efficiency of screen-printed silicon solar cells by light-induced silver plating
2006 4th World Conference on Photovoltaic Energy Conversion Hawaii, Seiten: 1056 - 1059
Huberth, F., Gerster, T., Guth, S., Hiermaier, S.
Kunststoffe in der Crashsimulation - Eine Betrachtung aus experimenteller Sicht unter Beruecksichtigung numerischer Problemstellungen
2006 Fortschritte der Kennwertermittlung fuer Forschung und Praxis. Tagung Werkstoffpruefung 2006, Verlag Stahleisen, Duesseldorf, Seiten: 91 - 96
Meenken, T., Hiermaier, S.
Large strain dynamic compression for soft materials using a direct impact experiment
2006 DYMAT 2006, 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, EDP Sciences, Les Ulis, Seiten: 653 - 659
Alemán M, Streek A, Regenfuß P, Mette A, Ebert R, Exner H, Glunz Stefan, Willeke G
Laser micro-sintering as a new metallization technique for silicon solar cells
2006 21st EU PVSEC, Seiten: 705 - 708
Huberth, F., Hiermaier, S.
Materialmodelle im Vergleich mit experimentell bestimmten Werkstoffverhalten
2006 24th CADFEM Users' Meeting 2006. CD-ROM, CAD-FEM GmbH, Grafing, Muenchen
Glunz Stefan, Mette A, Alemán M, Richter P, Filipovic A, Willeke G
New concepts for the front side metallization of silicon solar cells
2006 21st EU PVSEC, Seiten: 746 - 749
Grohe A, Knorz A, Aleman M, Harmel C, Glunz Stefan, Preu R, Willeke G
Novel low temperature front side metallisation scheme using selective laser ablation of anti reflection coatings and electroless nickel plating
2006 21st EU PVSEC, Seiten: 750 - 753
Mette A, Richter P, Glunz Stefan, Willeke G
Novel metal jet printing technique for the front side metallization of highly efficient industrial silicon solar cells
2006 21st EU PVSEC, Seiten: 1174 - 1177
Rüdiger M, Hermle M, Wolf A, Glunz Stefan
Numerical analysis of locally contacted rear surface passivated solar cells
2006 21st EU PVSEC
Hiermaier, S., Gebbeken, N.
Numerische Berechnungsverfahren fuer dynamische Prozesse
2006 2. Workshop "BAU-PROTECT" 2006. Sicherheit der baulichen Infrastruktur vor au�ergewoehnlichen Einwirkungen, Univ. der Bundeswehr Muenchen, Muenchen
Granek F, Hermle M, Fleischhauer B, Grohe A, Schultz O, Glunz Stefan, Willeke G
Optimisation of laser-fired aluminium emitters for high efficiency n-type Si solar cells
2006 21st EU PVSEC, Seiten: 777 - 780
Biro D, Preu R, Glunz Stefan, Rein S, Rentsch J, Emanuel G, Brucker I, Faasch T, Faller C, Willeke G, Luther J
PV-Tec: Photovoltaic technology evaluation center - design and implementation of a production research unit
2006 21st EU PVSEC, Seiten: 621 - 624
Grohe A, Harmel C, Knorz A, Glunz Stefan, Preu R, Willeke G
Selective laser ablation of anti-reflection coatings for novel metallization techniques
2006 4th World Conference on Photovoltaic Energy Conversion Hawaii, Seiten: 1399 - 1402
Glunz Stefan, Janz S, Hofmann M, Roth T, Willeke G
Surface passivation of silicon solar cells using amorphous silicon carbide layers
2006 4th World Conference on Photovoltaic Energy Conversion Hawaii, Seiten: 1016 - 1019
Roth T, Rüdiger M, Diez S, Trupke T, Bardos R, Glunz Stefan
Temperature- and injection-dependent photoluminescence lifetime spectroscopy
2006 21st EU PVSEC, Seiten: 593 - 596
Preu R, Biro D, Rentsch J, Clement F, Erath D, Emanuel G, Grohe A, Hofmann M, Mette A, Voyer C, Wolke W, Glunz Stefan, Willeke G
The status of silicon solar cell production technology development at fraunhofer ISE
2006 4th World Conference on Photovoltaic Energy Conversion Hawaii, Band: 1, Seiten: 1040 - 1043
Huberth, F., Hiermaier, S.
Verrippte Bauteile - Kugelimpaktversuche und Simulationsergebnisse mit LS-DYNA
2006 5. LS-DYNA Anwenderforum 2006, DYNAmore GmbH, Stuttgart, Ulm, Seite: 10

2005

nach oben zur Jahresübersicht

Rein S, Glunz Stefan
Advanced lifetime spectroscopy - defect parameters of iron in silicon and a new fingerprint
2005 20th EU PVSEC, Seiten: 753 - 756
Diez S, Rein S, Glunz Stefan
Analysing defects in silicon by temperature- and injection-dependent lifetime spectroscopy (T-IDLS)
2005 20th EU PVSEC, Seiten: 1216 - 1219
Glunz Stefan, Grohe A, Hermle M, Hofmann M, Janz S, Roth T, Schultz O, Vetter M, Martin I, Ferré R, Bermejo S, Wolke W, Warta W, Preu R, Willeke G
Comparison of different dielectric passivation layers for application in industrially feasible high-efficiency crystalline silicon solar cells
2005 20th EU PVSEC, Seiten: 572 - 577
Hermle M, Schneiderlöchner E, Grupp G, Glunz Stefan
Comprehensive comparison of different rear side contacting methods for high-efficiency solar cells
2005 20th EU PVSEC, Seiten: 810 - 813
Genoese M, Sensfuß F, Weidlich A, Möst D, Rentz O
Development of an agent-based model to analyse the effect of renewable energy on electricity markets
2005 Proceedings of the 19th Conference Informatics for Environmental Protection EnviroInfo, Brno

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Dhamrin M, Kamisako K, Saitoh T, Schultz O, Glunz Stefan, Eguchi T, Hirasawa T, Yamaga I, Kiden D
Effect of Fe-Ga pairs dissociation and association processes on recombination lifetimes in multicrystalline Si solar cells
2005 20th EU PVSEC, Seiten: 765 - 768
Schultz O, Glunz Stefan, Kray D, Dhamrin M, Yamaga I, Saitoh T, Willeke G
High-efficiency multicrystalline silicon solar cells on gallium-doped substrate
2005 20th EU PVSEC, Seiten: 741 - 744
Schubert M, Isenberg J, Rein S, Bermejo S, Glunz Stefan, Warta W
Injection dependent carrier density imaging measurements including correction for trapping effects
2005 20th EU PVSEC, Seiten: 1202 - 1205
Huberth, F., Hiermaier, S., Neumann, M.
Material models for polymers under crash loads existing LS-DYNA models and perspectives
2005 4. LS-DYNA Anwenderforum 2005, DYNAmore GmbH, Stuttgart, Stuttgart, Seiten: H - I
Goldschmidt J, Schultz O, Glunz Stefan
Predicting multi-crystalline silicon solar cell parameters from carrier density images
2005 20th EU PVSEC, Seiten: 663 - 666
Grohe A, Zastrow U, Meertens D, Houben L, Brendle W, Bilger G, Schneiderlöchner E, Glunz Stefan, Preu R, Willeke G
Progress in the characterisation of laser-fired contacts
2005 20th EU PVSEC, Seiten: 1158 - 1161
Schultz O, Hofmann M, Glunz Stefan, Willeke G
Silicon oxide/silicon nitride stack system for 20% efficient silicon solar cells
2005 31st IEEE Photovoltaic Specialists Conference Lake Buena Vista: Conference Record, Seiten: 872 - 876
Nossek, M., Sauer, M., Riedel, W., Hiermaier, S.
Simulation des Energieaufnahmevermoegens von CFK-Strukturen bei Belastungen in der Laminatebene
2005 Leichtbau als interdisziplin�re und branchenuebergreifende Herausforderung, LC-Verlag, Landshut, Seiten: 53 - 66
Wicklein, M., Hiermaier, S., Thoma, K.
Simulation of cellular aluminium: Crash and impact
2005 Cellular metals and polymers, CMaP 2004, Trans Tech Publications, Uetikon-Zuerich, Seiten: 111 - 114
Schneiderlöchner E, Grohe A, Fleischhauer B, Hofmann M, Glunz Stefan, Preu R, Willeke G
Status and advancement on transferring the laser-fired contact technology to screen-printed silicon solar cells
2005 20th EU PVSEC, Seiten: 785 - 788
Weidlich A
Testing market designs for balancing power markets with agent-based simulation
2005 Berlin Proceedings of the 4th Conference on Applied Infrastructure Research

2004

nach oben zur Jahresübersicht

Kampwerth H, Rein S, Glunz Stefan
Accurate determination of bulk lifetime and surface recombination velocity by a comprehensive thinning experiment
2004 19th EU PVSEC, Band: 1, Seiten: 733 - 737
Rein S, Glunz Stefan
Advanced lifetime spectroscopy - methodology and experimental proof
2004 19th EU PVSEC, Band: 1, Seiten: 479 - 483
Diez S, Glunz Stefan, Warta W, Willeke G, Vedde J, Shoulga Y, Vlasenko T
Alternatives to boron-doped Czochralski for silicon solar cell processing
2004 19th EU PVSEC, Band: 1, Seiten: 504 - 507
Schaefer, F., Hiermaier, S., Schneider, E.
Ballistic limit equation for the normal impact of unyawed ellipsoid-shaped projectiles on aluminium whipple shields
2004 Space Debris and Space Traffic Management Symposium 2003, Univelt, San Diego, Calif., Seiten: 291 - 308
Lee J, Glunz S
Boron-back surface field with spin-on dopants by rapid thermal processing
2004 19th EU PVSEC, Seiten: 998 - 1001
Sindelar, R., Riedel, W., Schaeuble, R., Thielicke, B., Hiermaier, S.
Failure mechanisms in layered composite materials for compressed hydrogen tanks
2004 FISITA World Automotive Congress 2004. Conference proceedings. CD-ROM, International Federation of Automobile Techniques Engineers -FISITA-, Barcelona
KurzfassungStorage systems for compressed hydrogen used in automotive applications are internally sealed by a diffusion barrier made of polyethylene or aluminium reinforced by a layer of several millimetres thick carbon fiber composite. A layer of impact resistant glass fiber covers the pressure vessel against external impact damage on the carbon shell. For safety reasons tank systems are qualified by several standardized tests. The main reason for these tests is to ensure that nocatas trophic failure of the tank could occur. Investigation on catastrophic failure of high performance composite materials was undertaken by testing and numerical simulation. Here the influence of preload during penetration of the laminate was investigated. A report of the current research is given.
Kahmen, H., Reiterer, A.
High-precision Object Monitoring with Image Assisted Theodolites – State of the Art
2004 CERN – European Organization for Nuclear Research, IWAA 2004 – 8th International Workshop on Accelerator Alignment
Mohr A, Hermle M, Roth T, Glunz Stefan
Influence of grid finger and busbar structure on the performance of rear-line-contacted silicon concentrator cells
2004 19th EU PVSEC, Band: 1, Seiten: 721 - 724
Glunz Stefan, Schneiderlöchner E, Kray D, Grohe A, Hermle M, Kampwerth H, Preu R, Willeke G
Laser-fired contact silicon solar cells on p- and n-substrates
2004 19th EU PVSEC, Seiten: 1 - 4
Rentsch J, Sparber W, Preu R, Glunz Stefan, Peters S, Neuhaus H, Lüdemann R
Production experience and lifetime investigations of industrally fabricated p-type Cz-silicon solar cells
2004 19th EU PVSEC, Band: 1, Seiten: 670 - 673
Schneiderlöchner E, Grupp G, Emanuel G, Lautenschlager H, Leimenstoll A, Glunz Stefan, Preu R, Willeke G
Silicon solar cells with screen printed front contact and dielectrically passivated laser-fired rear electrode
2004 19th EU PVSEC, Band: 1, Seiten: 447 - 450
Isenberg J, Riepe S, Schubert M, Glunz Stefan, Warta W
Spatially resolved IR-measurement techniques for solar cells
2004 19th EU PVSEC, Seiten: 403 - 407
Rein S, Diez S, Glunz Stefan
Temperature- and injection-dependent lifetime spectroscopy (TILDS): Advanced analysis
2004 19th EU PVSEC, Band: 1, Seiten: 219 - 222
Schultz O, Riepe S, Glunz Stefan
Thermal degradation and gettering of solar grade multicrystalline silicon: Abstract
2004 19th EU PVSEC, Band: 1, Seiten: 516 - 519
Schultz O, Glunz Stefan, Goldschmidt J, Lautenschlager H, Leimenstoll A, Schneiderlöchner E, Willeke G
Thermal oxidation processes for high-efficiency multicrystalline silicon solar cells
2004 19th EU PVSEC, Band: 1, Seiten: 604 - 607

2003

nach oben zur Jahresübersicht

Hiermaier, S., Sauer, M.
Adaptive FE-Meshfree-Modelling for Impacts of Liquid Filled Vessels on Thin Walled Structures
2003 Applied Mechanics and Biomedical Technology, Seiten: 43 - 48
KurzfassungA principal approach to simulate the airplane impact and the collapse of World Trade Center North Tower has been shown by Quan and Birnbaum [4]. Using the general purpose hydrocode AUTODYN the impact damage, fire induced strength reduction and progressive collapse were investigated. Both for the fuel propagation after tank break up and the thermodynamic burn processes assumptions have been taken. It is the aim of this paper to focus on the numerical aspects of simulating the fluid propagation after vessel break up. The release of a fluid out of a broken vessel after impact is not easily represented in a numerical simulation as the fluid flow and its interaction with structures can not be modelled using Lagrangian type element formulations. These elements, typically applied for structural analyses, fail under massive deformation and usually need then to be taken out of the simulation. Typical fluid dynamic discretization methods, so called Eulerian grids, would have to cover the whole space potentially being reached by the fluid flow and are therefore inefficient in a large three dimensional simulation. As an alternative method a coupled discretization using Lagrange elements and Lagrange type meshfree methods is proposed here. Meshfree methods have been introduced to structural dynamics more then ten years ago specifically to simulate processes including large deformation [1]. Originally developed as pure meshfree code, the EMI SOPHIA [3] provides now a new form of adaptivity that allows for more efficiency and accuracy. This is achieved by the use of finite elements as long as deformation is capable for the elements. At definable strain or failure thresholds any element can be transformed into one or more meshfree particles. This way, mass and volume of the original elements are conserved. As the particles interact with each other as well as with the remaining elements, all physical processes can be modelled continuously. The purpose of this study was to contribute to numerical simulation of the airplane impacts into the World Trade Center. It includes impact simulations of cylindrical vessels filled with water against thin walled rectangular shaped bars. It shows that coupled discretizations and specifically an adaptive FE-meshfree discretization offer the flexibility needed to gain both accuracy and efficiency in the simulation.
Rein S, Glunz Stefan
Advanced lifetime spectroscopy
2003 13th NREL Workshop on Crystalline Silicon Solar Cell Materials and Processes, Seiten: 18 - 25
Rein S, Lichtner P, Glunz Stefan
Advanced lifetime spectroscopy: Unambiguous determination of the electronic properties of the metastable defect in boron-doped Cz-Si
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1057 - 1060
Hermle M, Dicker J, Warta W, Glunz Stefan, Willeke G
Analysis of edge recombination for high-efficiency solar cells at low illumination densities
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1009 - 1012
Glunz Stefan, Grohe A, Hermle M, Schneiderlöchner E, Dicker J, Preu R, Mäckel H, Macdonald D, Cuevas A
Analysis of laser-fired local back surface fields using n+np+ cell structures
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Band: 2, Seiten: 1332 - 1335
Glunz Stefan, Schäffer E, Rein S, Bothe K, Schmidt J
Analysis of the defect activation in Cz-silicon by temperature-dependent bias-induced degradation of solar cells
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 919 - 922
Kray D, Kampwerth H, Leimenstoll A, Glunz Stefan, Willeke G
Analysis of very thin high-efficiency solar cells
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1021 - 1024
Grohe A, Schneiderlöchner E, Hermle M, Preu R, Glunz Stefan, Willeke G, Walz S
Characterization of laser-fired contacts processed on wafers with different resistivities
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1032 - 1035
Lee J, Dicker J, Rein S, Glunz Stefan
Investigation of various surface passivation layers using oxide/nitride stacks of silicon solar cells
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1069 - 1072
Wicklein, M., Sauer, M., Klomfass, A., Hiermaier, S., Thoma, K.
Mesomechanical simulation of cellular aluminium
2003 Cellular metals: Manufacture, properties, applications, MIT-Verlag, Berlin, Seiten: 369 - 374
Kray D, Dicker J, Osswald D, Leimenstoll A, Glunz Stefan, Zimmermann W, Tentscher K.-H., Strobl G
Progress in high-efficiency emitter-wrap-through cells on medium quality substrates
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1340 - 1343
Kampwerth H, Rein S, Glunz Stefan
Pure experimental determination of surface recombination properties with high reliability
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1073 - 1076
Schneiderlöchner E, Grohe A, Glunz Stefan, Preu R, Willeke G
Scanning Nd:YAG laser system for industrially applicable processing in silicon solar cell manufacturing
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 1364 - 1367
Mohr A, Steuder M, Bett A, Glunz Stefan
Silicon concentrator cells designed for a direct mounting on compound parabolic concentrator
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 841 - 844
Macdonald D, Cuevas A, Rein S, Lichtner P, Glunz Stefan
Temperature- and injection-dependent lifetime spectroscopy of copper-related defects in silicon
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 87 - 90
Schultz O, Emanuel G, Glunz Stefan, Willeke G
Texturing of multicrystalline silicon with acidic wet chemical etching and plasma etching
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Band: 2, Seiten: 1360 - 1363
Bruton T, Mason N, Roberts S, Nast-Hartley O, Gledhill S, Fernandez J, Russell R, Willeke G, Warta W, Glunz Stefan, Schultz O
Towards 20% efficient silicon solar cells manufactured at 60 MWp per annum
2003 3rd World Conference on Photovoltaic Energy Conversion Osaka, Seiten: 899 - 902

2002

nach oben zur Jahresübersicht

Corley, J., Riedel, W., Hiermaier, S., Weidemaier, P., Thoma, K.
A combined experimental/computational approach for assessing the high strain rate response of high explosive simulants and other viscoelastic particulate composite materials
2002 Shock compression of condensed matter 2001. Pt.1, American Institut of Physics, Melville, NY, Seiten: 705 - 708
Rein S, Lichtner P, Warta W, Glunz Stefan
Advanced defect characterization by combining temperature- and injection-dependent lifetime spectroscopy (TDLS and IDLS)
2002 29th IEEE Photovoltaic Specialists Conference New Orleans, Seiten: 190 - 193
Glunz Stefan, Kamerewerd F, Knobloch J, Kray D, Leimenstoll A, Lutz F, Oßwald D, Preu R, Schäffer E, Schetter C, Schmidhuber H, Schmidt H, Steuder M, Vorgrimler C, Willeke G
High-efficiency silicon solar cells for low-illumination applications
2002 29th IEEE Photovoltaic Specialists Conference New Orleans, Seiten: 450 - 453
Schneiderlochner E, Grohe A, Ballif C, Glunz Stefan, Preu R, Willeke G
Investigations on laser-fired contacts for passivated rear solar cells
2002 29th IEEE Photovoltaic Specialists Conference New Orleans, Seiten: 300 - 303
Preu R, Schneiderlochner E, Grohe A, Glunz Stefan, Willeke G
Laser-fired contacts - transfer of a simple high efficiency process scheme to industrial production
2002 29th IEEE Photovoltaic Specialists Conference New Orleans, Seiten: 130 - 133
Rakotoniaina J, Breitenstein O, Zhao J, Wang A, Green M, Rein S, Glunz Stefan
Local mapping of the oxygen-boron complex in 2$\times$2 cm2 and 10$\times$10 cm2 high-efficiency CZ-Si solar cells by lock-in thermography and LBIC
2002 29th IEEE Photovoltaic Specialists Conference New Orleans, Seiten: 434 - 437
Hiermaier, S., Sauer, M., Peter, J., Thoma, K.
Modeling the continuum/discrete transition using adaptive meshfree methods
2002 Fifth World Congress on Computational Mechanics 2002. Book of abstracts. Vol.2, TU Wien, Wien, Seite: 190
Hiermaier, S., Sauer, M., Thoma, K.
Predictive crash simulation using adaptive finite methods
2002 Berechnung und Simulation im Fahrzeugbau, VDI-Verlag, Duesseldorf, Seiten: 27 - 38
Peters S, Lee J, Ballif C, Borchert D, Glunz Stefan, Warta W, Willeke G
Rapid thermal processing: A comprehensive classification of silicon materials
2002 29th IEEE Photovoltaic Specialists Conference New Orleans, Seiten: 214 - 217
Rohr, I., Hiermaier, S., Thoma, K.
The erosion process during KE-Penetration: New experiments to investigate material behaviour
2002 20th International Symposium on Ballistics 2002. Proceedings. Vol.2: Terminal ballistics, DEStech Publications, Lancaster, Pa., Seiten: 1175 - 1181

2001

nach oben zur Jahresübersicht

Kray D, Dicker J, Leimenstoll A, Glunz Stefan, Willeke G
20% efficient flexible silicon solar cells
2001 17th EU PVSEC, Seiten: 1600 - 1603
Bruton T, Roberts S, Russell R, Warta W, Glunz G, Koch W, Luque A, Lago R, Caballero L, del Caňizo C, Marti A, Frisson L, Vallera A
A production route to high efficiency solar cells made with ultra thin silicon wafers
2001 17th EU PVSEC, Seiten: 1282 - 1286
Lee J, Peters S, Dicker J, Rein S, Glunz Stefan
Advanced RTP-process for boron-doped and oxygen contaminated Cz silicon
2001 17th EU PVSEC, Seiten: 1617 - 1620
Glunz Stefan, Dicker J, Altermatt P
Band gap narrowing in p-type base regions of solar cells
2001 17th EU PVSEC, Seiten: 1391 - 1395
Riepe S, Isenberg J, Ballif C, Glunz Stefan, Warta W
Carrier density and lifetime imaging of silicon wafers by infrared lock-in thermography
2001 17th EU PVSEC, Seiten: 1597 - 1599
Rein S, Rehrl T, Warta W, Glunz Stefan, Willeke G
Electrical and thermal properties of the metastable defect in boron-doped Czochralski silicon (Cz-Si)
2001 17th EU PVSEC, Seiten: 1555 - 1560
Schmidt J, Cuevas A, Rein S, Glunz Stefan
Fill factor limitations and non-ideal diode behaviour of Czochralski silicon solar cells due to light-induced recombination centres
2001 17th EU PVSEC, Seiten: 1396 - 1399
Glunz Stefan, Dicker J, Kray D, Lee J, Preu R, Rein S, Schneiderlöchner E, Sölter J, Warta W, Willeke G
High-efficiency cell structures for medium-quality silicon
2001 17th EU PVSEC, Seiten: 1287 - 1292
Kray D, Rein S, Oßwald D, Schäffer E, Kamerewerd F, Glunz Stefan, Willeke G
High-efficiency emitter-wrap-through cells
2001 17th EU PVSEC, Seiten: 1299 - 1302
Thoma, K., Riedel, W., Schaefer, F., Hiermaier, S.
Hypervelocity impacts and protection
2001 Third European Conference on Space Debris 2001. Proceedings. Vol.2, ESA Publications Division, Noordwijk, Seiten: 555 - 568
Hashigami H, Itakura Y, Takaki A, Rein S, Glunz Stefan, Saitoh T
Impact of carrier injection level on light-induced degradation of Cz-Si solar cell performance
2001 17th EU PVSEC, Seiten: 1483 - 1486
Schneiderlöchner E, Preu R, Lüdemann R, Glunz Stefan, Willeke G
Laser-fired contacts (LFC)
2001 17th EU PVSEC, Seiten: 1303 - 1306
Takaki A, Itakura Y, Hashigami H, Dhamrin M, Glunz Stefan, Saitoh T
Light-induced lifetime degradation in hydrogenated multicrystalline cast silicon substrates
2001 17th EU PVSEC, Seiten: 1487 - 1490
Palmieri, D., Schaefer, F., Hiermaier, S., Lambert, M.
Numerical simulation of non-perforating impacts on shielded gas-filled pressure vessels
2001 Hypervelocity impact, Pergamon, Oxford, Seiten: 591 - 602
Heider, N., Hiermaier, S.
Numerical simulation of the performance of tandem warheads
2001 19th International Symposium on Ballistics 2001. Proceedings. Vol.3: Warhead mechanics, vulnerability modeling, Seiten: 1493 - 1499
Schaefer, F., Herrwerth, M., Hiermaier, S., Schneider, E.
Shape effects in hypervelocity impact on semi-infinite metallic targets
2001 Hypervelocity impact, Pergamon, Oxford, Seiten: 699 - 712
Rein S, Rehrl T, Warta W, Glunz Stefan
Temperature-dependent lifetime spectroscopy (TDLS) in silicon
2001 17th EU PVSEC, Seiten: 1561 - 1566

2000

nach oben zur Jahresübersicht

Dicker J, Sölter J, Schumacher J, Glunz Stefan, Warta W
Analysis of rear contacted solar cell structures for cost-effective processes and materials
2000 28th IEEE Photovoltaic Specialists Conference Anchorage, Seiten: 387 - 390
Rein S, Knobloch J, Glunz Stefan
Analysis of the high-temperature improvement of Cz-silicon
2000 16th EU PVSEC, Seiten: 1201 - 1205
Rein S, Warta W, Glunz Stefan
Investigation of carrier lifetime in p-type Cz-silicon: Specific limitations and realistic prediction of cell performance
2000 28th IEEE Photovoltaic Specialists Conference Anchorage, Seiten: 57 - 60
Preu R, Glunz Stefan, Schäfer S, Lüdemann R, Wettling W, Pfleging W
Laser ablation - a new low-cost approach for passivated rear contact formation in crystalline silicon solar cell technology
2000 16th EU PVSEC, Seiten: 1181 - 1184
Rein S, Rehrl T, Isenberg J, Warta W, Glunz Stefan
Lifetime spectroscopy in silicon for solar cells
2000 16th EU PVSEC, Seiten: 1476 - 1481
Glunz Stefan, Preu R, Schaefer S, Schneiderlochner E, Pfleging W, Ludemann R, Willeke G
New simplified methods for patterning the rear contact of RP-PERC high-efficiency solar cells
2000 28th IEEE Photovoltaic Specialists Conference Anchorage, Seiten: 168 - 171
Schaefer S, Preu R, Lüdemann R, Glunz Stefan
Plasma etched PERC and buried base contact solar cells
2000 16th EU PVSEC, Seiten: 1441 - 1446
Bruton T, Roberts S, Heasman K, Russell R, Warta W, Glunz Stefan, Dicker J, Knobloch J
Prospects for high efficiency silicon solar cells in thin Czochralski wafers using industrial processes
2000 28th IEEE Photovoltaic Specialists Conference Anchorage, Seiten: 180 - 183
Glunz Stefan, Rein S, Knobloch J
Stable Czochralski silicon solar cells using gallium-doped base material
2000 16th EU PVSEC, Seiten: 1070 - 1075
Saitoh T, Hashigami H, Wang X, Abe T, Igarashi T, Glunz Stefan, Rein S, Wettling W, Ebong A, Damiani B, Rohatgi A, Yamasaki I, Nunoi T, Sawai H, Ohtuka H, Warabisako T, Zhao J, Green M, Schmidt J, Cuevas A, Metz A, Hezel R
Suppression of light-induced degrdadtion of minority-carrier lifetimes in low-resistivity Cz-Si wafers and solar cells
2000 16th EU PVSEC, Seiten: 1206 - 1209
Altermatt P, Schumacher J, Cuevas A, Glunz Stefan, King R, Heiser G, Schenk A
The extraction of the surface recombination velocity of Si: P emitters using advanced silicon models
2000 16th EU PVSEC, Seiten: 102 - 105

1999

nach oben zur Jahresübersicht

Höhn Oliver, Tucher Nico, Richter Armin, Hermle Martin, Bläsi Benedikt
Light scattering at random pyramid textures: Effects beyond geometric optics
1999 SiliconPV 2018, The 8th International Conference on Crystalline Silicon Photovoltaics American Institute of Physics, Seiten: 030002-1 - 030002-5

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1998

nach oben zur Jahresübersicht

Thoma, K., Hiermaier, S., Riedel, W.
Beton unter dynamischer Beanspruchung: Materialmodellierung, Messung von Parametern und numerische Simulation
1998 10. Forum Bauinformatik - Junge Wissenschaftler forschen, VDI-Verlag, Duesseldorf
KurzfassungZur Berechnung von kurzzeitdynamischen Vorgaengen wie Impakt und explosiver Belastung werden Finite-Element-Programm vom Typ 'Hydrocodes' verwendet. Durch inkrementelle Stoffgesetze bei expliziter Zeitintegration sind sie zur Modellierung von komplexen Materialverhalten geeignet. Die mechanischen Eigenschaften von Beton sind von Inhomogenit�t und Porosit�t gepr�gt. In dem Beitrag werden nichtlineare Materialmodelle der Kontinuumsmechanik unter Beruecksichtigung von Sch�digung mit mikromechanischen Ans�tzen verglichen. Die n�tigen Materialparameter werden am Ernst-Mach-Institut in verschiedenen statischen
Glunz Stefan, Rein S, Warta W, Knobloch J, Wettling W
On the degradation of Cz-silicon solar cells
1998 2nd World Conference on Photovoltaic Solar Energy Conversion Vienna, Seiten: 1343 - 1346
Preu R, Schumacher J, Hahne P, Lautenschlager H, Reis I, Glunz Stefan, Warta W
Screen printed and RT-processed emitters for crystalline silicon solar cells
1998 2nd World Conference on Photovoltaic Solar Energy Conversion Vienna, Seiten: 1503 - 1506
Hebling C, Glunz Stefan, Schumacher J, Knobloch J
Variation of the back surface field in silicon thin-film solar cells with interdigitated front grid
1998 2nd World Conference on Photovoltaic Solar Energy Conversion Vienna, Seiten: 1786 - 1789

1997

nach oben zur Jahresübersicht

Schumacher J, Dicker J, Glunz Stefan, Hebling C, Knobloch J, Warta W, Wettling W
Characterization of silicon solar cells with interdigitated contacts
1997 26th IEEE Photovoltaic Specialists Conference Anaheim, Seiten: 71 - 74
Hebling C, Glunz Stefan, Schumacher J, Knobloch J
High-efficiency (19.2%) silicon thin-film solar cells with interdigitated emitter and base front-contacts
1997 14th EU PVSEC, Seiten: 2318 - 2321
Sterk S, Münzer K, Glunz Stefan
Investigation of the degradation of crystalline silicon solar cells
1997 14th EU PVSEC, Seiten: 85 - 87
Glunz Stefan, Schumacher J, Warta W, Knobloch J, Wettling W
Optimization of mesh-structured emitters
1997 14th EU PVSEC, Seiten: 127 - 130
Glunz Stefan, Knobloch J, Biro D, Wettling W
Optimized high-efficiency silicon solar cells with Jsc=42 mA/cm2 and h=23.3 %
1997 14th EU PVSEC, Seiten: 392 - 395
Bett A, Glunz Stefan, Knobloch J, Schindler J, Wettling W
Simplification of process technology for high-efficiency solar cells
1997 1st NREL Conference on Future Generation Photovoltaic Technologies Denver, Seiten: 355 - 366
Glunz Stefan, Knobloch J, Hebling C, Wettling W
The range of high-efficiency silicon solar cells fabricated at Fraunhofer ISE
1997 26th IEEE Photovoltaic Specialists Conference Anaheim, Seiten: 231 - 234

1996

nach oben zur Jahresübersicht

Knobloch J, Glunz Stefan, Biro D, Warta W, Schaffer E, Wettling W
Solar cells with efficiencies above 21% processed from Czochralski grown silicon
1996 25th IEEE Photovoltaic Specialists Conference Washington DC, Seiten: 405 - 408

1995

nach oben zur Jahresübersicht

Knobloch J, Glunz Stefan, Henninger V, Warta W, Wettling W, Schomann F, Schmidt W, Endrös A, Münzer K
21 % efficient solar cells processed from Czochralski grown silicon
1995 13th EU PVSEC, Seiten: 9 - 12
Rosmeulen M, Glunz Stefan, Warta W, Knobloch J, Wettling W
Analysis of LPCVD oxides for the passivation of high efficiency silicon solar cells
1995 13th EU PVSEC, Seiten: 403 - 406
Glunz Stefan, Sterk S, Steeman R, Warta W, Knobloch J, Wettling W
Emitter dark saturation currents of high-efficiency solar cells with inverted pyramids
1995 13th EU PVSEC, Seiten: 409 - 412
Grützmacher D, Kiess H, Rehwald W, Schäffler F, Ramm J, Dommann A, Glunz Stefan
Low temperature processing for crystalline Si solar cells
1995 13th EU PVSEC, Seiten: 1360 - 1363

1994

nach oben zur Jahresübersicht

Glunz Stefan, Hebling C, Warta W, Wettling W
Comparison of spatially resolved carrier lifetimes in mc-Si with solar cell and material characteristics
1994 1st World Conference on Photovoltaic Energy Conversion Hawaii, Band: 2, Seiten: 1625 - 1628
Sterk S, Glunz Stefan, Knobloch J, Wettling W
High efficiency (<22%) Si-solar cells with optimized emitter
1994 1st World Conference on Photovoltaic Energy Conversion Hawaii, Band: 2, Seiten: 1303 - 1306
Demesmaeker E, Glunz Stefan, Knobloch J, Wettling W
Low-temperature surface passivation of silicon solar cells by means of a TMCTS oxide
1994 12th EU PVSEC, Seiten: 713 - 715
Glunz Stefan, Sproul A, Sterk S, Warta W
Understanding effective lifetimes measured on oxidized silicon wafers with different techniques
1994 12th EU PVSEC, Seiten: 492 - 495

1991

nach oben zur Jahresübersicht

Kopp J, Warta W, Aberle A, Glunz Stefan, Knobloch J
Impact of metallization techniques on 20% efficient silicon solar cells
1991 22nd IEEE Photovoltaic Specialists Conference Las Vegas, Band: 278, Seiten: 278 - 283
Aberle A, Glunz Stefan, Warta W, Kopp J, Knobloch J
SiO2-passivated high efficiency silicon solar cells: process dependence of Si-SiO2 interface recombination
1991 10th EU PVSEC, Seiten: 631 - 635

Festschriften

Jahre: 2006 | 2005

zurück zur Übersicht aller Publikationen

2006

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Kahmen, H., Reiterer, A.
Bildgebende Theodolite. Festschrift 125 Jahre Geodäsie und Geoinformatik
2006 Leibniz Universität Hannover, Seiten: 209 - 215

2005

nach oben zur Jahresübersicht

Reiterer, A.
Wissensbasierte Entscheidungsfindung für bildgebende Messsysteme; Festschrift anlässlich des 65. Geburtstages von Herrn o. Univ.-Prof. Dr.-Ing. Heribert Kahmen
2005 Geowissenschaftliche Mitteilungen, Seiten: 95 - 101

Sonstige Publikationen

Jahre: 2021 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2008 | 2003

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2021

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Klobasa M, Kühnbach M, Pelka S, Stute J, Sarfarazi S, Nienhaus K, Bruckmeier A, Springmann E, Köppl S, Guthoff F, Qussous R, Ritter D, Flachsbarth F, Heinemann C
Bewertung der systemischen Auswirkungen der C/sells-Anwendungsfälle: Gesamtbericht der Arbeiten in Arbeitspaket 2.6 des SINTEG-Forschungsprojekts C/sells
Fraunhofer ISI, 2021
Weidlich A
Infrastrukturen für ein klimaneutrales Energiesystem: Szenarienstudien weisen den Weg
Stiftung Energie und Klimaschutz, 2021
Sauer DU, Pittel K, Henning H-M, Renn J, Schmidt C, Spiecker I, Bett A, Haucap J, Kühling J, Matthies E, Umbach E, Ragwitz M, Staiß F, Weidlich A, Erlach B, Glotzbach U, Lapac A, Seiler A, Stephanos C
Wenn nicht jetzt, wann dann – wie die Energiewende gelingt
acatech Schriftenreihe zur wissenschaftsbasierten Politikberatung, 2021

2018

nach oben zur Jahresübersicht

Hofmann F, Schäfer M, Brown T, Hörsch J, Schramm S, Greiner M
Principal Flow Patterns across renewable electricity networks
Epl-europhys Lett, Band: 124, Seite: 18005, 2018

2017

nach oben zur Jahresübersicht

Messmer Christoph
Numerical Simulation and Analysis of Metal Oxide Contact Properties for Silicon Heterojunction Solar Cells
, 2017
Reiterer, A.
Trends bei mobilen Laserscannern (Editorial)
avn, Nummer: 11-12/2017, 2017

2016

nach oben zur Jahresübersicht

Weidlich A, Schmidt M
C/sells – ein Schaufenster in die zukünftige Energieversorgung
Campus Magazin der Hochschule Offenburg, Band: 40, Seiten: 36 - 37, 2016

2015

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Weidlich A
Nachhaltige Energiewirtschaft
Studienbrief im Kontaktstudium Energiewirtschaft, Zentrum für Mediales Lernen, Karlsruher Institut für Technologie, 2015
Weidlich A, Hochberg U, Bessler W
Power-to-Gas optimiert einsetzen
Forschung im Fokus, Seiten: 124 - 125, 2015
Weidlich A, Denne, B
Projekt "Nachhaltige Hochschule"
Campus Magazin der Hochschule Offenburg, Band: 39, Seiten: 12 - 13, 2015

2014

nach oben zur Jahresübersicht

Appelrath HJ, Brunekreeft G, Weidlich A, Wissing C, Mayer C, Ochsenbrügge A, Schnabel SC, Tröschel M
Future Energy Markets – Mehr Markt für eine effiziente Energiewende
acatech Materialien, 2014

2013

nach oben zur Jahresübersicht

Briegel F, van Dinther C, Jahn B, Weidlich A, Terzidis O
Impulse für eine smarte Energiewende - Handlungsempfehlungen für ein IKT-gestütztes Stromnetz der Zukunft
Bundesverband der Deutschen Industrie, 2013

2012

nach oben zur Jahresübersicht

Weidlich A, Boy B, Ermakov V, Renelt R, Schmidt P, Sauer M, Sobótka M, Storace S, Wiedemann W
Smart zur Energiewende - fünf Schlüssel zur gesellschaftlichen Akzeptanz von Smart Grids
Policy Brief, stiftung neue verantwortung, 2012
Weidlich A
Vom dienenden zum intelligenten Stromnetz
Gastbeitrag im Blog der 100 prozent erneuerbar stiftung, 2012
Weidlich A
Wer viel nutzt, muss viel zahlen
ZEIT-Online, 2012

2011

nach oben zur Jahresübersicht

Adam R, Böse C, Bomarius F, Bretschneider P, Briegel B, van Dinther C, Drzisga T, Fey B, Flath C, Frey H, Jeutter P, Kern C, Muhs M, Onken H, Praehauser G, Rogg K, Schönberg I, Schumann D, Terzidis O, Wedler M, Weidlich A, Weinhardt C
Auf dem Weg zum Internet der Energie - Der Wettbewerb allein wird es nicht richten; Smart Grid - Paradigmenwechsel in Deutschland
Bundesverband der Deutschen Industrie, 2011

2008

nach oben zur Jahresübersicht

Block C, Bomarius F, Bretschneider P, Briegel F, Burger N, Fey B, Frey H, Hartmann J, Kern C, Plail B, Praehauser G, Schetters L, Schöpf F, Schumann D, Schwammberger F, Terzidis O, Thiemann R, van Dinther C, von Sengbusch K, Weidlich A, Weinhardt C
Internet der Energie-IKT für Energiemärkte der Zukunft
BDI-Drucksache, 2008

2003

nach oben zur Jahresübersicht

Weidlich A, Manolakaki E, Ciampa F
Courses and Trainings in Europe – In the field of sustainable energy
Comité de Liaison Energies Renouvelables, Montreuil, 2003

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