Dr. Andreas Bett

Director (acting), Head of Division Materials - Solar Cells and Technologies

Research focus

The main areas of research of Dr. Andreas Bett include solar silicon material, epitaxial growth of Si and III-V semiconductors, development of characterisation techniques for advanced solar cell devices and the fabrication of solar cells. Furthermore, he develops concentrator module and systems and is involved in field testing.
He is also co-founder of the company Concentrix Solar which manufactures and installs CPV systems. In addition he is active member in the IEC TC82 WG7 for standardisation of CPV technologies and member of the European PV Platform WG3. He has organised several international conferences and served in many scientific committees.

Curriculum vitae

Andreas W. Bett received the Dipl. Degree in physics and the Dipl. degree in mathematics form the Albert Ludwigs-University, Freiburg, Germany in 1988 and 1989, respectively and the PhD degree in physics form the University in Konstanz, Germany in 1992. He joined the Fraunhofer Institute for Solar Energy Systems, ISE in 1987. In 1993 he became the head of the group “III-V – epitaxy and solar cells”. Since 2007 he is head of the department “Materials – Solar Cells and Technology” and from 2009 until 2016 he was deputy director of the institute. In 2017 he was appointed director (acting) of the institute. 

Awards & outstanding achievements

In 2009 Dr. Andreas Bett received the 17th European Becquerel Prize for outstanding merits in photovoltaics. In 2010 he was awarded with the Joseph von Fraunhofer Prize and the EARTO Prize and in 2012 he received the German Environmental Prize for his efforts and achievements in industrialisation of CPV technology.

Publications

YearTitle/AuthorDocument Type
2017Concentrating photovoltaic systems
Steiner, M.; Gerstmaier, T.; Bett, A.W.
Book Article
2017Monolithic two-terminal III-V//Si triple-junction solar cells with 30.2% efficiency under 1-Sun AM1.5g
Cariou, R.; Benick, J.; Beutel, P.; Razek, N.; Flötgen, C.; Hermle, M.; Lackner, D.; Glunz, S.W.; Bett, A.W.; Wimplinger, M.; Dimroth, F.
Journal Article
2017On the alignment tolerance of photovoltaic laser power converters
Wagner, L.; Bett, A.W.; Helmers, H.
Journal Article
2017On the temperature dependence of dual-junction laser power converters
Reichmuth, S.K.; Helmers, H.; Philipps, S.P.; Schachtner, M.; Siefer, G.; Bett, A.W.
Journal Article
2017Reliable and lightning-safe monitoring of wind turbine rotor blades using optically powered sensors
Worms, K.; Klamouris, C.; Wegh, F.; Meder, L.; Volkmer, D.; Philipps, S.P.; Reichmuth, S.K.; Helmers, H.; Kunadt, A.; Vourvoulakis, J.; Bett, A.W.; Koos, C.; Freude, W.; Leuthold, J.; Stork, W.
Journal Article
201643 % direct sunlight conversion efficiency using 4J cell with achromatic full glass lens
Steiner, M.; Siefer, G.; Schmidt, T.; Wiesenfarth, M.; Dimroth, F.; Bett, A.W.
Conference Paper
201643% sunlight to electricity conversion efficiency using CPV
Steiner, M.; Siefer, G.; Schmidt, T.; Wiesenfarth, M.; Dimroth, F.; Bett, A.W.
Journal Article
2016CPV-T Mirror Dish System Combined with Water Desalination Systems
Wiesenfarth, M.; Went, J.; Bösch, A.; Dilger, A.; Kec, T.; Kroll, A.; Koschikowsi, J.; Bett, A.W.
Conference Paper
2016CPVMatch - concentrating photovoltaic modules using advanced technologies and cells for highest efficiencies
Philipps, S.P.; Baudrit, M.; Hillerich, K.; Moreau, V.; Parmesani, R.; Román, E.; Sala, G.; Schineller, B.; Timo, G.; Bett, A.W.
Conference Paper
2016CPVMatch - Concentrating photovoltaic modules using advanced technologies and cells for highest efficiencies
Philipps, Simon P.; Baudrit, Mathieu; Hillerich, Karla; Moreau, Valentine; Parmesani, Rolando; Román, Eduardo; Sala, Gabriel; Schineller, Bernd; Timò, Gianluca; Bett, Andreas W.
Conference Paper
2016CPVMatch - Concentrating Photovoltaic modules using advanced technologies and cells for highest efficiencies
Philipps, S.P.; Baudrid, M.; Hillerich, K.; Moreau, V.; Parmesani, R.; Sala, G.; Schineller, B.; Bett, A.W.
Presentation
2016Determination of subcell I-V characteristics of multijunction solar cells using optical coupling
Nesswetter, H.; Jost, N.R.; Lugli, P.; Bett, A.W.; Zimmermann, C.G.
Journal Article
2016Determination of subcell open circuit voltages and Iph–Voc curves in multijunction solar cells by sequentially pulsed, monochromatic illumination
Rutzinger, M.; Nesswetter, H.; Lugli, P.; Bett, A.W.; Zimmermann, C.G.
Journal Article
2016Determining the optimal laser wavelength for laser power conversion depending on operation temperature
Höhn, O.; Walker, A.W.; Bett, A.W.; Helmers, H.
Conference Paper
2016Four-junction wafer-bonded concentrator cells
Dimroth, F.; Tibbits, T.N.D.; Niemeyer, M.; Predan, F.; Beutel, P.; Karcher, C.; Oliva, E.; Siefer, G.; Lackner, D.; Fuß-Kailuweit, P.; Bett, A.W.; Krause, R.; Drazek, C.; Guiot, E.; Wasselin, J.; Tauzin, A.; Signamarcheix, T.
Journal Article
2016Influence of injection current and temperature on electroluminescence of GaAs laser power converters: Presentation held at 3rd Euroregional Workshop on Photovoltaics & Nanophotonics 2016, Ljubljana, Slovenia, 21.09.2016-23.09.2016
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Presentation
2016Influence of Very Efficient Back Reflectors on the Quantum Efficiency of Solar Cells
Micha, D.N.; Walker, A.; Siefer, G.; Dimroth, F.; Bett, A.W.
Conference Paper
2016Integrated Power and Data Transceiver Devices for Power-by-Light Systems - A Concept Study
Helmers, H.; Lackner, D.; Siefer, G.; Oliva, E.; Dimroth, F.; Bett, A.W.
Conference Paper
2016Nonradiative lifetime extraction using power-dependent relative photoluminescense of III-V semiconductor double-heterostructures
Walker, A.W.; Heckelmann, S.; Karcher, C.; Höhn, O.; Went, C.; Niemeyer, M.; Bett, A.W.; Lackner, D.
Journal Article
2016Optimal laser wavelength for efficient laser power converter operation over temperature
Höhn, O.; Walker, A.W.; Bett, A.W.; Helmers, H.
Journal Article
2016A sensitivity analysis of the stepwise measurement procedure for the characterization of large area PV modules
Rapp, C.; Steiner, M.; Siefer, G.; Bett, A.W.
Journal Article
2016Temperature and injection current dependent electroluminescence for evaluation of single-junction single-segment GaAs laser power converter
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Journal Article
2016Transient I-V Measurement Set-up for Photovoltaic Laser Power Converters under Monochromatic Irradiance
Reichmuth, S.K.; Helmers, H.; Garza, C.E.; Vahle, D.; Boer, M. de; Stevens, L.; Mundus, M.; Helmers, H.; Bett, A.W.; Siefer, G.
Conference Paper
2016Wave optical simulation of the light trapping properties of black silicon surface textures
Bett, A.J.; Eisenlohr, J.; Höhn, O.; Repo, P.; Savin, H.; Bläsi, B.; Goldschmidt, J.C.
Journal Article
2015Analysis of a four lamp flash system for calibrating multi-junction solar cells under concentrated light
Schachtner, M.; Prado, M.L.; Reichmuth, S.K.; Siefer, G.; Bett, A.W.
Conference Paper
2015Challenges and perspectives of CPV technology: Presentation held at 42nd IEEE Photovoltaic Specialists Conference 2015, New Orleans, USA, 14.06.2015-19.06.2015
Bett, A.W.
Presentation
2015CPV module design optimization for advanced multi-junction solar cell concepts
Steiner, M.; Kiefel, P.; Siefer, G.; Wiesenfarth, M.; Dimroth, F.; Krause, R.; Gombert, A.; Bett, A.W.
Conference Paper
2015CPV module with fresnel lens primary optics and homogenizing secondary optics
Wiesenfarth, M.; Dörsam, T.; Eltermann, F.; Hornung, T.; Siefer, G.; Steiner, M.; Riesen, S. van; Neubauer, M.; Boos, A.; Wanka, S.; Gombert, A.; Bett, A.W.
Conference Paper
2015Determination of subcell I-V parameters by a pulsed suns-Voc method including optical coupling
Nesswetter, H.; Jost, N.R.; Lugli, P.; Bett, A.W.; Zimmermann, C.G.
Journal Article
2015Energy level of the Si-related DX-center in (AlyGa1-y)1-xInxAs
Heckelmann, S.; Lackner, D.; Bett, A.W.
Journal Article
2015FLATCON® CPV-module with 36.7% efficiency equipped with four-junction solar cells
Steiner, M.; Bösch, A.; Dilger, A.; Dimroth, F.; Dörsam, T.; Muller, M.; Hornung, T.; Siefer, G.; Wiesenfarth, M.; Bett, A.W.
Journal Article
2015Four-junction wafer bonded concentrator solar cells
Dimroth, F.; Tibbits, T.N.D.; Niemeyer, M.; Predan, F.; Beutel, P.; Karcher, C.; Oliva, E.; Siefer, G.; Lackner, D.; Fuß-Kailuweit, P.; Bett, A.W.; Krause, R.; Drazek, C.; Guiot, E.; Wasselin, J.; Tauzin, A.; Signamarcheix, T.
Conference Paper
2015Frequency division multiple-based light spectroscopy
Mißbach, T.; Karcher, C.; Siefer, G.; Bett, A.W.
Journal Article
2015A high-efficiency hybrid high-concentration photovoltaic system
Zimmermann, S.; Helmers, H.; Tiwari, M.K.; Paredes, S.; Michel, B.; Wiesenfarth, M.; Bett, A.W.; Poulikakos, D.
Journal Article
2015Impact of Photon Recycling and Luminescence Coupling in III-V Photovoltaic Devices
Walker, A.; Höhn, O.; Micha, D.; Wagner, L.; Helmers, H.; Dimroth, F.; Bett, A.
Conference Paper
2015Impact of photon recycling and luminescence coupling on III-V single and dual junction photovoltaic devices
Walker, A.W.; Höhn, O.; Micha, D.N.; Wagner, L.; Helmers, H.; Bett, A.W.; Dimroth, F.
Journal Article
2015Impact of photon recycling on GaAs solar cell designs
Walker, A.W.; Höhn, O.; Micha, D.N.; Bläsi, B.; Bett, A.W.; Dimroth, F.
Journal Article
2015Investigations on AlxGa1-xAs solar cells grown by MOVPE
Heckelmann, S.; Lackner, D.; Karcher, C.; Dimroth, F.; Bett, A.W.
Journal Article
2015Lattice-matched 3-junction cell with 1.2-eV InGaAs/GaAsP superlattice middle cell for improved current matching
Sodabanlu, H.; Fujii, H.; Watanabe, K.; Onitsuka, R.; Agui, T.; Juso, H.; Takamoto, T.; Lackner, D.; Dimroth, F.; Bett, A.W.; Sugiyama, M.; Nakano, Y.
Conference Paper
2015Low temperature effects in photovoltaic devices for deep space missions
Hoheisel, R.; Walters, R.J.; Bett, A.W.
Conference Paper
2015NGCPV: A new generation of concentrator photovoltaic cells, modules and systems (a final review)
Datas, A.; Cristóbal, A.B.; Sala, G.; Anton Hernandez, I.; Minano, J.C.; Benítez, P.; Algora, C.; Bett, A.W.; Lackner, D.; Niemeyer, M.; Philipps, S.P.; Siefer, G.; Ekins-Daukes, N.J.; Roca, F.; Cancro, C.; Luque-Heredia, L.; Warmuth, W.; Baudrit, M.; Okada, Y.; Sugiyama, M.; Hishikawa, Y.; Takamoto, T.; Araki, K.; Fukuyama, A.; Nishioka, K.; Suzuki, H.; Kuze, N.; Moriyasu, Y.; Kita, T.; Kotagiri, A.; Kojima, N.; Martí Vega, A.; Yamaguchi, M.; Luque, A.
Conference Paper
2015Optical Investigation of a Sun Simulator for Concentrator PV Applications
Rapp, C.; Straub. V.; Rooyen, D.W. van; Thor, W. Y.; Siefer, G.; Bett, A.W.
Journal Article
2015Pathway and technologies for the transformation of the energy system: Presentation held at Sustainability Summit 2015, Freiburg, Germany, October 20, 2015
Bett, A.W.; Henning, H.-M.
Presentation
2015Photoluminescence-based current-voltage characterisation of individual subcells in multi-junction devices
Alsonso-Álvarez, D.; Lackner, D.; Philipps, S.P.; Bett, A.W.; Ekins-Daukes, N.J.
Conference Paper
2015Photovoltaic Cells with Increased Voltage Output for Optical Power Supply of Sensor Electronics
Helmers, H.; Wagner, L.; Garza, C.E.; Reichmuth, S.K.; Oliva, E.; Philipps, S.P.; Lackner, D.; Bett, A.
Conference Paper
2015Quantum efficiency measurement of concentrator photovoltaic modules
Mundus, M.; Rapp, C.; Missbach, T.; Siefer, G.; Hohl-Ebinger, J.; Bett, A.W.; Warta, W.
Conference Paper
2015Research strategies to approach the 50% efficiency barrier with multi-junction solar cells: Presentation held at National Scientific Conference "Next Generation Solar" 2015, Toronto, USA, May 13-14, 2015
Bett, A.W.
Presentation
2015Stepwise measurement procedure for the characterization of large-area photovoltaic modules
Rapp, C.; Steiner, M.; Siefer, G.; Bett, A.W.
Journal Article
2015YieldOpt, a model to predict the power output and energy yield for concentrating photovoltaic modules
Steiner, M.; Siefer, G.; Hornung, T.; Peharz, G.; Bett, A.W.
Journal Article
2014Analysis of temperature coefficients for III-V multi-junction concentrator cells
Siefer, G.; Bett, A.W.
Journal Article
2014Challenges for Thermal Management and Production Technologies in Conchotovoltaic (CPV) Modules
Wiesenfarth, M.; Gamisch, S.; Dörsam, T.; Bett, A.W.
Conference Paper
2014Comparison of direct growth and wafer bonding for the fabrication of GaInP/GaAs dual-junction solar cells on silicon
Dimroth, F.; Roesener, T.; Essig, S.; Weuffen, C.; Wekkeli, A.; Oliva, E.; Siefer, G.; Volz, K.; Hannappel, T.; Häussler, D.; Jäger, W.; Bett, A.W.
Journal Article
2014CPV - Technology: Status and Market Perspectives: Presentation held at Solar 2050 Workshop 2014, London, Great Britain, 27.01.2014
Bett, A.W.
Presentation
2014Development and Investigation of a CPV Module with Cassegrain Mirror Optics
Dreger, M.; Wiesenfarth, M.; Kisser, A.; Schmid, T.; Bett, A.W.
Conference Paper
2014Development of high efficiency wafer bonded 4-junction solar cells for concentrator photovoltaic applications
Dimroth, F.; Tibbits, T.N.D.; Beutel, P.; Karcher, C.; Oliva, E.; Siefer, G.; Schachtner, M.; Wekkeli, A.; Steiner, M.; Wiesenfarth, M.; Bett, A.W.; Krause, R.; Gerster, E.; Piccin, M.; Blanc, N.; Munoz Rico, M.; Drazek, C.; Guiot, E.; Wasselin, J.; Arena, C.; Salvetat, T.; Tauzin, A.; Signamarcheix, T.; Hannappel, T.
Conference Paper
2014Front side antireflection concepts for silicon solar cells with diffractive rear side structures
Bett, A.; Eisenlohr, J.; Höhn, O.; Bläsi, B.; Benick, J.; Repo, P.; Savin, H.; Goldschmidt, J.C.; Hermle, M.
Conference Paper
2014High-Efficiency - A Key for CPV: Presentation held at CPV-10, 10th International Conference on Concentrator Photovoltaic Systems 2014, Albuquerque, USA, 08.04.2014
Bett, A.W.
Presentation
2014Highly Efficient Multi-junction Solar Cells
Bett, A.
Presentation
2014Hot-carrier solar cell spectral insensitivity: Why develop the hot-carrier solar cell when we have multi-junction devices
Hirst, Louise C.; Lumb, Matthew P.; Hoheisel, Raymond; Philipps, Simon P.; Bett, Andreas W.; Walters, Robert J.
Conference Paper
2014III-V multi-junction solar cells
Philipps, S.P.; Bett, A.W.
Book Article
2014III-V multi-junction solar cells and concentrating photovoltaic (CPV) systems
Philipps, S.P.; Bett, A.W.
Journal Article
2014InGaAs/GaAsP strain balanced multi-quantum wires grown on misoriented GaAs substrates for high efficiency solar cells
Alonso-Álvarez, D.; Thomas, T.; Führer, M.; Hylton, N.P.; Ekins-Daukes, N.; Lackner, D.; Philipps, S.P.; Bett, A.W.; Sodabanlu, H.; Fujii, H.; Watanabe, K.; Sugiyama, M.; Nasi, L.; Campanini, M.
Journal Article
2014Investigation of Different Fresnel Lens Designs and Methods to Determine the Optical Efficiency
Wiesenfarth, M.; Steiner, M.; Wolf, J.; Schmidt, T.; Bett, A.W.
Conference Paper
2014An investigation of solar cell interconnection schemes within CPV modules using a validated temperature-dependent SPICE network model
Steiner, M.; Siefer, G.; Bett, A.W.
Journal Article
2014Lightning-Safe Monitoring of Wind Turbine Rotor Blades Using Optically Powered Sensors
Worms, K.; Klamouris, C.; Wegh, F.; Meder, L.; Volkmer, D.; Phillips, S.; Reichmuth, S.; Helmers, H.; Bett, A.W.; Vourvoulakis, J.; Freude, W.; Leuthold, J.; Stork, W.
Conference Paper
2014Mehrfachsolarzelle, Verfahren zu deren Herstellung und Verwendungen hiervon
Dimroth, Frank; Bett, Andreas
Patent
2014Modeling of concentrating photovoltaic and thermal systems
Helmers, H.; Bett, A.W.; Parisi, J.; Agert, C.
Journal Article
2014Next generation of wafer-bonded multi-junction solar cells
Niemeyer, M.; Klinger, V.; Dimroth, F.; Predan, F.; Fuß-Kailuweit, P.; Reinwand, D.; Lackner, D.; Wekkeli, A.; Oliva, E.; Schachtner, M.; Siefer, G.; Bett, A.W.
Conference Paper
2014Novel light trapping concepts for crystalline silicon solar cells using diffractive rear side structures
Eisenlohr, J.; Tucher, N.; Bett, A.; Hauser, H.; Graf, M.; Benick, J.; Goldschmidt, J.; Bläsi, B.; Hermle, M.
Conference Paper
2014Photovoltaic cells for optical power and data transmission: Presentation held at 34. European Telemetry and Test Conference, etc 2014, Nürnberg, Germany, 03.06.2014-05.06.2014
Helmers, H.; Philipps, S.P.; Reichmuth, S.K.; Oliva, E.; Lackner, D.; Bett, A.W.
Presentation
2014Preliminary Temperature Accelerated Life Test (ALT) On Lattice Mismatched Triple-Junction Concentrator
Orlando, V.; Espinet, P.; Nunez, N.; Contreras, Y.; Bautista, J.; Vázquez, M.; Algora, C.; Eltermann, F.; Bett, A.W.
Conference Paper
2014The promise of III-V high-efficiency solar cells: Presentation held at 6th International Symposium on Innovative Solar Cells 2014, Tokyo, Japan, 20.01.2014-21.01.2014
Bett, A.W.
Presentation
2014Similarities and Differences between Terrestrial CPV and Space Multi-Junction Solar Cells: Presentation held at 10th European Space Power Conference 2014, Noordwijkerhout, Netherlands, 13.04.2014-17.04.2014
Bett, A.W.
Presentation
2014Spectral sensitivity of hot carrier solar cells
Hirst, L.C.; Lumb, M.P.; Hoheisel, R.; Philipps, S.P.; Bett, A.W.; Walters, R.J.; Bailey, C.G.
Journal Article
2014SPICE network simulation to calculate thermal runaway in III-V solar cells in CPV modules
Steiner, M.; Siefer, G.; Bett, A.W.
Journal Article
2014Temperature-dependent electroluminescence and voltages of multi-junction solar cells
Karcher, C.; Helmers, H.; Schachtner, M.; Dimroth, F.; Bett, A.W.
Journal Article
2014Wafer Bonded 4-Junction GaInP/GaAs/GaInAsP/GaInAs Concentrator Solar Cells
Krause, R.; Piccin, M.; Munoz Rico, M.; Charles-Alfred, C.; Drazek, C.; Guiot, E.; Dimroth, F.; Bett, A.; Grave, M.; Beutel, P.; Karcher, C.; Tibbits, T.; Oliva, E.; Siefer, G.; Schachtner, M.; Wekkeli, A.; Signamarcheix, T.
Conference Paper
2014Wafer bonded four-junction GaInP/GaAa/GaInAsP/GaInAs concentrator solar cells with 44.7% efficiency
Dimroth, F.; Grave, M.; Beutel, P.; Fiedeler, U.; Karcher, C.; Tibbits, T.N.D.; Oliva, E.; Siefer, G.; Schachtner, M.; Wekkeli, A.; Bett, A.W.; Krause, R.; Piccin, M.; Drazek, C.; Guiot, E.; Ghyselen, B.; Salvetat, T.; Tauzin, A.; Signamarcheix, T.; Dobrich, A.; Hannappel, T.; Schwarzburg, K.; Blanc, N.
Journal Article
2013Advanced liquid cooling in HCPVT systems to achieve higher energy efficiencies
Zimmermann, S.; Helmers, H.; Tiwari, M.K.; Escher, W.; Paredes, S.; Neves, P.; Poulikakos, D.; Wiesenfarth, M.; Bett, A.W.; Michel, B.
Conference Paper
2013AlxGa1-xAs minority carrier lifetime enhancement at low temperatures
Heckelmann, S.; Lackner, D.; Dimroth, F.; Bett, A.W.
Journal Article
2013Analysis of high concentration passively cooled CPV module designs using mirror optics
Dreger, M.; Wiesenfarth, M.; Schmid, T.; Bett, A.W.
Conference Paper
2013Bandgap determination based on electrical quantum efficiency
Helmers, H.; Karcher, C.; Bett, A.W.
Journal Article
2013Defect formation and strain relaxation in graded GaPAs/GaAs, GaNAs/GaAs and GaInNAs/Ge buffer systems for high-efficiency solar cells
Schöne, J.; Spiecker, E.; Dimroth, F.; Bett, A.W.; Jäger, W.
Journal Article
2013Efficiency of dense-array CPVT module with front-side interconnected cells
Polonsky, G.; Shelef, G.; Flitsanov, Y.; Wiesenfarth, M.; Steiner, M.; Helmers, H.; Bett, A.W.; Kribus, A.
Conference Paper
2013Electroluminescence analysis of irradiated GaInP/GaInAs/Ge space solar cells
Hoheisel, R.; Dimroth, F.; Bett, A.W.; Messenger, S.R.; Jenkins, P.P.; Walters, R.J.
Conference Paper
2013Electroluminescence and photoluminescence characterization of multijunction solar cells
Nesswetter, H.; Lugli, P.; Bett, A.W.; Zimmermann, C.G.
Journal Article
2013Fast atom beam-activated n-Si/n-GaAs wafer bonding with high interfacial transparency and electrical conductivity
Essig, S.; Moutanabbir, O.; Wekkeli, A.; Nahme, H.; Oliva, E.; Bett, A.W.; Dimroth, F.
Journal Article
2013High efficiency III-V multijunction solar cells
Philipps, S.P.; Dimroth, F.; Bett, A.W.
Book Article
2013III-V multi-junction solar cells: Market, technological status and research trends
Philipps, S.P.; Bett, A.W.
Conference Paper
2013Improved grating monochromator set-up for EQE measurements of multi-junction solar cells
Siefer, G.; Gandy, T.; Schachtner, M.; Wekkeli, A.; Bett, A.W.
Conference Paper
2013Influence of temperature and irradiance on triple-junction solar subcells
Helmers, H.; Schachtner, M.; Bett, A.W.
Journal Article
2013Investigations on 3-dimensional temperature distribution in a FLATCON-type CPV module
Wiesenfarth, M.; Gamisch, S.; Kraus, H.; Bett, A.W.
Conference Paper
2013Investigations on the influence of temperature and concentration on solar cell performances
Helmers, H.; Schachtner, M.; Bett, A.W.
Conference Paper
2013Luminescence based series resistance mapping of III-V multijunction solar cells
Nesswetter, H.; Dyck, W.; Lugli, P.; Bett, A.W.; Zimmermann, C.G.
Journal Article
2013Modeling the thermal runaway effect in CPV modules
Steiner, M.; Siefer, G.; Bett, A.W.
Conference Paper
2013NGCPV: A new generation of concentrator photovoltaic cells, modules and systems
Datas, A.; Cristóbal, A.B.; Sala, G.; Anton, I.; Minano, J.C.; Benítez, P.; Bett, A.W.; Siefer, G.; Ekins-Daukes, N.J.; Roca, F.; Cancro, C.; Luque-Heredia, I.; Warmuth, W.; Baudrit, M.; Okada, Y.; Sugiyama, M.; Hishikawa, Y.; Takamoto, T.; Araki, K.; Fukuyama, A.; Nishioka, K.; Suzuki, H.; Kuze, N.; Moriyasu, Y.; Kita, T.; Kotagiri, A.; Kojima, N.; Marti, A.; Yamagucchi, M.; Luque, A.
Conference Paper
2013Optical analysis of deviations in a concentrating photovoltaics central receiver system with a flux homogenizer
Helmers, H.; Thor, W.Y.; Schmidt, T.; Rooyen, D.W. van; Bett, A.W.
Journal Article
2013Overview about technology perspectives for high efficiency solar cells for space and terrestrial applications
Bett, A.W.; Philipps, S.P.; Essig, S.; Heckelmann, S.; Kellenbenz, R.; Klinger, V.; Niemeyer, M.; Lackner, D.; Dimroth, F.
Conference Paper
2013Photovoltaik mit hohen Wirkungsgraden. III-V Mehrfachsolarzellen und konzentrierende PV: Vortrag gehalten auf dem 4. Photovoltaik-Symposium, "Photovoltaik und Energiewende" 2013, Bitterfeld-Wolfen, Germany, 07.11.2013
Bett, A.W.
Presentation
2013Photovoltaik: Technologien und Märkte - Quo Vadis?: Vortrag gehalten auf der 11. Österreichische Photovoltaik-Tagung 2013, St. Pöltgen, Österreich, 19.11.-20.11.2013
Philipps, S.P.; Bett, A.W.
Presentation
2013Photovoltaik: Technologien und Märkte - Quo Vadis?: Vortrag gehalten auf der 11. Nationalen Photovoltaik-Tagung 2013, Basel, Switzerland, 11.03.-12.03.2013
Bett, A.W.
Presentation
2013Series resistance mapping of III-V multijunction solar cells based on luminescence imaging
Nesswetter, H.; Dyck, W.; Lugli, P.; Bett, A.W.; Zimmermann, C.G.
Conference Paper
2013Temperature dependent electroluminescence and voltages of multi-junction solar cells
Karcher, C.; Helmers, H.; Schachtner, M.; Dimroth, F.; Bett, A.W.
Conference Paper
2012Advanced concepts in concentrating photovoltaics (CPV)
Wiesenfarth, M.; Helmers, H.; Philipps, S.P.; Steiner, M.; Bett, A.W.
Conference Paper
2012Concentrating PV: Status and perspectives: Presentation held at Solar Summit 2012, 5th International Conference on Highlights and Trends in Solar Energy, Freiburg 19.10.2012
Bett, A.W.; Wiesenfarth, M.; Philipps, S.P.
Presentation
2012Concentrix solar's progress in developing highly efficient modules
Riesen, S. van; Gombert, A.; Gerster, E.; Gerstmaier, T.; Jaus, J.; Eltermann, F.; Bett, A.W.
Conference Paper
2012CPV plants data analysis. ISFOC and NACIR projects results
Martínez, M.; Rubio, F.; Sala, G.; Pachón, D.; Bett, A.; Siefer, G.; Vetter, M.; Schies, A.; Wachtel, J.; Gombert, A.; Wüllner, J.; Díaz, V.; Vázquez, M.A.; Abulfotuh, F.; Fetyan, K.; Moussaoui, A. el; Mansouri, S.; Loudiyi, K.; Darhmaoui, H.; Mrabti, T.
Conference Paper
2012Degradation study on optical materials for concentrator photovoltaics
Eltermann, F.; Roeder, K.; Wiesenfarth, M.; Wilde, J.; Bett, A.W.
Conference Paper
2012Einbinden der Erneuerbaren in das Energiesystem
Bett, A.W.; Philipps, S.P.
Journal Article
2012Electroluminescence and photoluminescence characterization of multijunction solar cells
Nesswetter, H.; Lugli, P.; Bett, A.W.; Zimmermann, C.G.
Conference Paper
2012Experimental analysis of majority carrier transport processes at heterointerfaces in photovoltaic devices
Hoheisel, R.; Bett, A.W.
Journal Article
2012Front-side interconnected large area concentrator cells for compact concentrator modules
Wiesenfarth, M.; Steiner, M.; Helmers, H.; Siefer, G.; Oliva, E.; Dimroth, F.; Shelef, G.; Polonsky, G.; Flitsanov, Y.; Kribus, A.; Bett, A.W.
Conference Paper
2012High Efficiency III-V Multi-Junction Solar Cells
Philipps, S.; Dimroth, F.; Bett, A.
Book Article
2012Increasing the energy yield of CPV modules through optimized solar cell interconnection
Steiner, M.; Medvidovic, J.; Siefer, G.; Bett, A.W.
Conference Paper
2012Manufacture of Multijunction Solar Cell Devices
Ghyselen, B.; Arena, C.; Dimroth, Frank; Bett, Andreas
Patent
2012Manufacture of Multijunction Solar Cell Devices
Ghyselen, B.; Arena, C.; Dimroth, Frank; Bett, Andreas
Patent
2012Mehrfachsolarzelle und deren Verwendung
Dimroth, Frank; Bett, Andreas
Patent
2012NGCPV: A new generation of concentrator photovoltaic cells, modules and systems
Cristóbal, A.; Marti, A.; Sala, G.; Bett, A.; Ekins-Daukes, N.J.; Roca, F.; Luque-Heredia, I.; Warmuth, W.; Merten, J.; Okada, Y.; Hishikawa, Y.; Takamoto, T.; Araki, K.; Fukuyama, A.; Kuze, N.; Kita, T.; Kotagiri, A.; Yamaguchi, M.; Luque, A.
Conference Paper
2012Numerical simulations of absorption properties of InP nanowires for solar cell applications
Kailuweit, P.; Peters, M.; Leene, J.; Mergenthaler, K.; Dimroth, F.; Bett, A.W.
Journal Article
2012Optoelectronic sensor for measuring direct solar radiation in e.g. parabolic trough solar power plant in roof of building, has protection window, case and housing that are arranged in optical path immediately in front of sensing element
Bett, Andreas; Siefer, Gerald; Boesch, Armin; Jaus, Joachim; Peharz, Gerhard
Patent
2012Outdoor test setup for concentrating photovoltaic and thermal (CPVT) systems
Helmers, H.; Boos, A.; Jetter, F.; Heimsath, A.; Wiesenfarth, M.; Bett, A.W.
Conference Paper
2012Perspektiven für das Zusammenspiel von Energieeffizienz und Erneuerbaren sowie ihre Einbindung in das Energiesystem
Bett, Andrea; Burger, Bruno; Ebert, Günther; Philipps, Simon; Stryi-Hipp, Gerhard; Rohrig, Kurt; Strauß, Philipp; Krautkremer, Bernd; Gils, Christian; Hauser, Gerd; Brabec, Christoph J.; Ebert, Hans-Peter; Hauer, Andreas
Conference Paper
2012Present Status in the Development of II-V Multi-Junction Solar Cells
Philipps, S.; Guter, W.; Welser, E.; Schöne, J.; Steiner, M.; Dimroth, F.; Bett, A.W.
Book Article
2012Realistic power output modeling of CPV modules
Steiner, M.; Siefer, G.; Bösch, A.; Hornung, T.; Bett, A.W.
Conference Paper
2012Spectrally resolved DNI measurements: Results of a field comparison of spectroradiometers, componentcells and the SOLIS satellite model
Gerstmaier, T.; Riesen, S. van; Schulz-Gericke, J.; Gombert, A.; Behrendt, T.; Lorenz, E.; Steiner, M.; Schachtner, M.; Siefer, G.; Bett, A.W.
Conference Paper
2012A validated SPICE network simulation study on improving tunnel diodes by introducing lateral conduction layers
Steiner, M.; Guter, W.; Peharz, G.; Philipps, S.P.; Dimroth, F.; Bett, A.W.
Journal Article
2011Determination of the subcell photovoltage in multijunction solar cells via voltage-dependent capacitance analysis
Hoheisel, R.; Schachtner, M.; Stämmler, E.; Bett, A.W.
Journal Article
2011Dilute Nitrides for 4- and 6-Junction Space Solar Cells
Essig, S.; Welser, E.; Rönsch, S.; Oliva, E.; Schachtner, M.; Siefer, G.; Bett, A.W.; Dimroth, F.
Conference Paper
2011The Effects of Accelerated Aging Tests on Metamorphic III-V Concentrator Solar Cells Mounted on Substrates
Eltermann, F.; Wiesenfarth, M.; Siefer, G.; Wilde, J.; Bett, A.W.
Conference Paper
2011Electroluminescence Exposes Individual Performances in Multi-Junction Cells
Hoheisel, R.; Rönsch, S.; Dimroth, F.; Bett, A.W.; Nesswetter, H.; Zimmermann, C.G.
Journal Article
2011An experimental and theoretical study on the temperature dependence of GaAs solar cells
Philipps, S.P.; Hoheisel, R.; Gandy, T.; Stetter, D.; Hermle, M.; Dimroth, F.; Bett, A.W.
Conference Paper
2011Four-junction spectral beam-splitting photovoltaic receiver with high optical efficiency
Mitchell, B.; Peharz, G.; Siefer, G.; Peters, M.; Gandy, T.; Goldschmidt, J.C.; Benick, J.; Glunz, S.W.; Bett, A.W.; Dimroth, F.
Journal Article
2011III-V Multi-Junction Solar Cells and Concentrating Optics A Perfect Match for Highest Efficiencies
Bett, A.
Journal Article
2011Investigations on the temperature dependence of CPV modules equipped with triple-junction solar cell
Peharz, G.; Ferrer Rodriguez, J.P.; Siefer, G.; Bett, A.W.
Journal Article
2011A method for using CPV modules as temperature sensors and its application to rating procedures
Peharz, G.; Ferrer Rodriguez, J.P.; Siefer, G.; Bett, A.W.
Journal Article
2011A New Tool to Measure Monolithic Multi Junction Solar Cells with up to Six Subcells
Schachtner, M.; Hoheisel, R.; Sabuncuoglu, F.; Siefer, G.; Bett, A.W.; Darou, S.; Spinner, D.
Conference Paper
2011Perspektiven für das Zusammenspiel von Energieeffizienz und Erneuerbaren sowie ihre Einbindung in das Energiesystem
Philipps, S.; Bett, A.; Burger, B.; Ebert, G.; Stryi-Hipp, G.; Rohrig, K.; Strauß, P.; Krautkremer, B.; Gils, H.C.; Hauser, G.; Brabec, C.J.; Ebert, H.-P.; Hauer, A.
Conference Paper
2011Reflective secondary optical elements for fresnel lens based concentrator modules
Jaus, J.; Bett, A.W.; Reinecke, H.; Weber, E.R.
Journal Article
2011Solarzellenmodul und Konzentratormodul sowie deren Verwendung
Wiesenfarth, Maike; Gamisch, Sebastian; Doersam, T.; Bett, A.
Patent
2011Spectral Measurements Using Component Cells: Examinations on Measurement Precision
Jaus, J.; Mißbach, T.; Philipps, S.P.; Siefer, G.; Bett, A.W.
Conference Paper
2011Subcell I-V characteristic analysis of GaInP/GaInAs/Ge solar cells using electroluminescence measurements
Rönsch, S.; Hoheisel, R.; Dimroth, F.; Bett, A.W.
Journal Article
2011Updating the European Strategic Research Agenda
Pearsall, N.; Bett, A.W.; Bonemazzi, F.; Dimmler, B.; Glunz, S.; Poortmans, J.; Strauss, P.
Conference Paper
2011Validated front contact grid simulation for GaAs solar cells under concentrated sunlight
Steiner, M.; Philipps, S.P.; Hermle, M.; Bett, A.W.; Dimroth, F.
Journal Article
2010Advanced processing techniques used for the development of dual-junction monolithic interconnected modules
Helmers, H.; Oliva, E.; Bronner, W.; Dimroth, F.; Bett, A.W.
Conference Paper
2010Amorphous SixC1-x:H single layers before and after thermal annealing: Correlating optical and structural properties
Hartel, A.M.; Künle, M.; Löper, P.; Janz, S.; Bett, A.W.
Journal Article
2010CPV technology overview - research and development: Presentation held at 1st EPIA International Conference on Concentrator Photovoltaics 2010, Munich, Germany, 10.11.2010
Bett, A.W.; Kurtz, S.
Presentation
2010Development of radiation hard Ga0.50In0.50P/Ga0.99In0.01As/Ge space solar cells with multi quantum wells
Kellenbenz, R.; Hoheisel, R.; Kailuweit, P.; Guter, W.; Dimroth, F.; Bett, A.W.
Conference Paper
2010Development, cost reduction and customized design of industrial concentrator solar cells with efficiencies approaching 40% and above
Guter, W.; Bensch, W.; Kern, R.; Köstler, W.; Meusel, M.; Strobl, G.; Riesen, S. van; Gerstmaier, T.; Gombert, A.; Dimroth, F.; Bett, A.W.
Conference Paper
2010Energy harvesting efficiency of III-V multi-junction concentrator solar cells under realistic spectral conditions
Philipps, S.P.; Peharz, G.; Hoheisel, R.; Hornung, T.; Al-Abbadi, N.M.; Dimroth, F.; Bett, A.W.
Conference Paper
2010Energy harvesting efficiency of III-V triple-junction concentrator solar cells under realistic spectral conditions
Philipps, S.P.; Peharz, G.; Hoheisel, R.; Hornung, T.; Al-Abbadi, N.M.; Dimroth, F.; Bett, A.W.
Journal Article
2010Evaluation of satellite cirrus data for performance models of CPV modules
Peharz, G.; Bugliaro, L.; Siefer, G.; Bett, A.W.
Conference Paper
2010External quantum efficiency measurements of germanium bottoms subcells: Measurement artifacts and correction procedures
Siefer, G.; Baur, C.; Bett, A.W.
Conference Paper
2010Feasibility study on high concentrating photovoltaic power towers
Frohberger, D.; Jaus, J.; Wiesenfarth, M.; Schramek, P.; Bett, A.W.
Conference Paper
2010High-Concentration Fresnel Lens Assemblies and Systems
Peharz, G.; Bett, A.
Book Article
2010III-V multijunction solar cells - from current space and terrestrial products to modern cell architectures
Meusel, M.; Bensch, W.; Fuhrmann, D.; Guter, W.; Kern, R.; Köstler, W.; Löckenhoff, R.; Strobl, G.; Kellenbenz, R.; Klinger, V.; Siefer, G.; Welser, E.; Dimroth, F.; Bett, A.W.
Conference Paper
2010Investigation of radiation hardness of germanium photovoltaic cells
Hoheisel, R.; Fernandez, J.; Dimroth, F.; Bett, A.W.
Journal Article
2010Investigations on interconnection technologies for CPV systems
Wiesenfarth, M.; Thaller, S.; Jaus, J.; Eltermann, F.; Passig, M.; Bett, A.W.
Conference Paper
2010Konzentrator-Photovoltaik mit hocheffizienten III-V-Solarzellen
Bett, A.
Book Article
2010Long-term energy production of III-V triple-junction solar cells on the Martian surface
Hoheisel, R.; Philipps, S.P.; Bett, A.W.
Journal Article
2010Modeling of the degradation of III-V triple-junction cells due to particle irradiation on the basis of component cells
Baur, C.; Bett, A.W.
Conference Paper
2010MOVPE growth of III-V solar cells on silicon in 300 mm closed coupled showerhead reactor
Roesener, T.; Döscher, H.; Beyer, A.; Brückner, S.; Klinger, V.; Wekkeli, A.; Kleinschmidt, P.; Jurecka, C.; Ohlmann, J.; Volz, K.; Stolz, W.; Hannappel, T.; Bett, A.W.; Dimroth, F.
Conference Paper
2010Numerical simulation and modeling of GaAs quantum-well solar cells
Kailuweit, P.; Kellenbenz, R.; Philipps, S.P.; Guter, W.; Bett, A.W.; Dimroth, F.
Journal Article
2010Optoelectronic characterisation of intermediate band solar cells by photoreflectance: Comparison to other advanced architectures
Cánovas, E.; Fuertes Marrón, D.; Marti, A.; Luque, A.; Stanley, C.R.; Farmer, C.D.; Bett, A.W.
Conference Paper
2010Photoreflectance analysis of a GaInP/GaInAs/Ge multijunction solar cell
Cánovas, E.; Fuertes Marrón, D.; Marti, A.; Luque, A.; Bett, A.W.; Dimroth, F.; Philipps, S.P.
Journal Article
2010Photovoltaik 3.0 - Innovation für mehr Strom aus Licht: Vortrag gehalten bei Photonik 2020 - Impulsvortrag für Workshop IV, Berlin, Germany, 23.03.2010
Bett, A.W.
Presentation
2010Processing techniques for monolithic interconnection of solar cells at wafer level
Helmers, H.; Olivia, E.; Bronner, W.; Dimroth, F.; Bett, A.W.
Journal Article
2010Promises of advanced multi-junction solar cells for the use in CPV systems
Dimroth, F.; Philipps, S.P.; Peharz, G.; Welser, E.; Kellenbenz, R.; Roesener, T.; Klinger, V.; Oliva, E.; Steiner, M.; Meusel, M.; Guter, W.; Bett, A.W.
Conference Paper
2010Temperature coefficients of FLATCON® modules
Peharz, G.; Ferrer-Rodriguez, J.P.; Siefer, G.; Bett, A.W.
Conference Paper
2009Analysis of radiation hardness of rear-surface passivated germanium photovoltaic cells
Hoheisel, R.; Fernandez, J.; Dimroth, F.; Bett, A.W.
Conference Paper
2009Current-matched triple-junction solar cell reaching 41.1% conversion efficiency under concentrated sunlight
Guter, W.; Schöne, J.; Philipps, S.P.; Steiner, M.; Siefer, G.; Wekkeli, A.; Welser, E.; Oliva, E.; Bett, A.W.; Dimroth, F.
Journal Article
2009Developing large and efficient fluorescent concentrator systems
Goldschmidt, J.C.; Peters, M.; Dimroth, F.; Bett, A.W.; Steidl, L.; Zentel, R.; Hermle, M.; Glunz, S.W.; Willeke, G.
Conference Paper
2009Development and optimization of a 1 eV (GaIn)(NAs) solar cell
Volz, K.; Szesney, A.; Jurecka, C.; Nemeth, I.; Rubel, O.; Stolz, W.; Welser, E.; Oliva, E.; Dimroth, F.; Bett, A.W.
Conference Paper
2009Development of FLATCON® modules using secondary optics
Jaus, J.; Peharz, G.; Gombert, A.; Ferrer-Rodriguez, J.P.; Dimroth, F.; Eltermann, F.; Passig, M.; Wolf, O.; Siefer, G.; Hakenjos, A.; Riesen, S. van; Bett, A.W.
Conference Paper
2009Fluctuations of the peak current of tunnel diodes in multi-junction solar cells
Jandieri, K.; Baranovskii, S.D.; Stolz, W.; Gebhard, F.; Guter, W.; Hermle, M.; Bett, A.W.
Journal Article
2009Front contact grid optimization of III-V solar cells with SPICE network simulation
Steiner, M.; Philipps, S.P.; Hermle, M.; Bett, A.W.; Dimroth, F.
Conference Paper
2009Fundamentally new aspects of tunnel diode transitions in multi-junction photovoltaics
Braun, A.; Hirsch, B.; Katz, E.A.; Gordon, J.M.; Guter, W.; Bett, A.W.
Conference Paper
2009High-voltage GaAs photovoltaic laser power converters
Schubert, J.; Oliva, E.; Dimroth, F.; Guter, W.; Löckenhoff, R.; Bett, A.W.
Journal Article
2009Highest efficiency multi-junction solar cell for terrestrial and space applications
Bett, A.W.; Dimroth, F.; Guter, W.; Hoheisel, R.; Oliva, E.; Philipps, S.P.; Schöne, J.; Siefer, G.; Steiner, M.; Wekkeli, A.; Welser, E.; Meusel, M.; Köstler, W.; Strobl, G.
Conference Paper
2009III-V multi-junction solar cells - Simulation and experimental realization
Philipps, S.P.; Guter, W.; Steiner, M.; Oliva, E.; Siefer, G.; Weiser, E.; George, B.M.; Hermle, M.; Dimroth, F.; Bett, A.W.
Journal Article
2009Localized irradiation effects on tunnel diode transitions in multi-junction concentrator solar cells
Braun, A.; Hirsch, B.; Katz, E.A.; Gordon, J.M.; Guter, W.; Bett, A.W.
Journal Article
2009Metamorphic GaInP/GaInAs/Ge triple-junction solar cells with > 41 % efficiency
Dimroth, F.; Guter, W.; Schöne, J.; Welser, E.; Steiner, M.; Oliva, E.; Wekkeli, A.; Siefer, G.; Philipps, S.P.; Bett, A.W.
Conference Paper
2009NACIR: A new project on CPV'S funded by the European comission under 7th FP
Sala, G.; Pachon, D.; Leloux, J.; Victoria, M.; Bett, A.W.; Banda, P.; Gombert, A.; Diaz, V.; Vazquez, M.A.; Moussaoui, A. el; Abulfotuh, F.A.
Conference Paper
2009An optically powered fibre network for heterogeneous subscribers
Freude, W.; Roger, M.; Dreschmann, M.; Hübner, M.; Bett, A.W.; Becker, J.; Leuthold, J.
Conference Paper
2009Shaping the angular divergence at sun simulators for concentrator modules
Peharz, G.; Ferrer-Rodriguez, J.P.; Bett, A.W.
Conference Paper
2009A simple method for quantifying spectral impacts on multi-junction solar cells
Peharz, G.; Siefer, G.; Bett, A.W.
Journal Article
2009A theoretical analysis on the energy production of III-V multi-junction solar cells under realistic spectral conditions
Philipps, S.P.; Peharz, G.; Hornung, T.; Hoheisel, R.; Al-Abbadi, N.M.; Dimroth, F.; Bett, A.W.
Conference Paper
2009Theoretical investigation on optimum bandgap energies of Ge-based III-V triple-junction solar cells for long-term energy production on Mars
Hoheisel, R.; Philipps, S.P.; Dimroth, F.; Bett, A.W.
Conference Paper
2009Theoretical investigation on optimum bandgap energies of Ge-Based III–V Triple-Junction solar cells for long-term energy production on mars
Hoheisel, R.; Philipps, S.P.; Dimroth, F.; Bett, A.W.
Conference Paper
20083-junction space solar cell analysis and characterisation for Mars exploration missions
Khorenko, V.; Meusel, M.; Torunksi, T.; Strobl, G.; Hoheisel, R.; Dimroth, F.; Bett, A.W.; Campesato, R.; Milanesi, P.; Taylor, S.
Conference Paper
2008Calibrated numerical model of a GaInP-GaAs dual-junction solar cell
Philipps, S.P.; Hermle, M.; Letay, G.; Dimroth, F.; George, B.M.; Bett, A.W.
Journal Article
2008Characterization and numerical modeling of the temperature-dependent behavior of GaAs solar cells
Philipps, S.P.; Stetter, D.; Hoheisel, R.; Hermle, M.; Dimroth, F.; Bett, A.W.
Conference Paper
2008Characterizing GaInP/GaInAs/Ge multijunction solar cells with electroluminescence
Kirchartz, T.; Helbig, A.; Hermle, M.; Rau, U.; Bett, A.W.
Conference Paper
2008Development of metamorphic triple-junction solar cells for low temperature, low intensity operation in space
Dimroth, F.; Hoheisel, R.; Guter, W.; Schöne, J.; Siefer, G.; Welser, E.; Stetter, D.; Bett, A.W.
Conference Paper
2008Development, characterisation and 1000 suns outdoor tests of GaAs monolithic interconnected module (MIM) receivers
Löckenhoff, R.; Dimroth, F.; Oliva, E.; Ohm, A.; Wilde, J.; Faiman, D.; Biryukov, S.; Melnichak, V.; Kabalo, S.; Bokobza, D.; Bett, A.W.
Journal Article
2008Doping electrical properties and solar cell application of GaInNAs
Volz, K.; Stolz, W.; Teubert, J.; Klar, P.J.; Heimbrodt, W.; Dimroth, F.; Baur, C.; Bett, A.W.
Book Article
2008GaAs converters for high power densities of laser illumination
Oliva, E.; Dimroth, F.; Bett, A.W.
Journal Article
2008III-V solar cells under monochromatic illumination
Bett, A.W.; Dimroth, F.; Löckenhoff, R.; Oliva, E.; Schubert, J.
Conference Paper
2008Internal voltages in GaInP/GaInAs/Ge multijunction solar cells determined by electroluminescence measurements
Kirchartz, T.; Rau, U.; Hermle, M.; Bett, A.W.; Helbig, A.; Werner, J.H.
Journal Article
2008Misfit dislocation blocking by dilute nitride intermediate layers
Schöne, J.; Spiecker, E.; Dimroth, F.; Bett, A.W.; Jäger, W.
Journal Article
2008Numerical simulation and modeling of III-V multi-junction solar cells
Philipps, S.P.; Hermle, M.; Letay, G.; Guter, W.; George, B.M.; Dimroth, F.; Bett, A.W.
Conference Paper
2008Numerical simulation of tunnel diodes and multi-junction solar cells
Hermle, M.; Philipps, S.P.; Letay, G.; Bett, A.W.
Conference Paper
2008Numerical simulation of tunnel diodes for multi-junction solar cells
Hermle, A.; Letay, G.; Philipps, S.P.; Bett, A.W.
Journal Article
2008Offenes verkapseltes Konzentratorsystem fuer Solarstrahlung
Loeckenhoff, R.; Bett, A.; Wiesenfarth, M.; Segev, R.
Patent
2008Optically powered fiber networks
Roger, M.; Böttger, G.; Dreschmann, M.; Klamouris, C.; Hübner, M.; Bett, A.W.; Becker, J.; Freude, W.; Leuthold, J.
Journal Article
2008An optically powered video camera link
Böttger, G.; Dreschmann, M.; Klamouris, C.; Hübner, M.; Roeger, M.; Bett, A.W.; Kueng, T.; Becker, J.; Freude, W.; Leuthold, J.
Journal Article
2008Optimization of annealing conditions of (GaIn)(NAs) for solar cell applications
Volz, K.; Lackner, D.; Nemeth, I.; Kunert, B.; Stolz, W.; Baur, C.; Dimroth, F.; Bett, A.W.
Journal Article
2008Outdoor evaluation of FLATCON® modules and systems
Bett, A.W.; Jaus, J.; Peharz, G.; Siefer, G.; Hakenjos, A.; Heile, I.; Lerchenmüller, H.; Wüllner, J.
Conference Paper
2008Performance prediction of triple-junction solar cells under arbitrary operating conditions
Hoheisel, R.; Dimroth, F.; Bett, A.W.
Conference Paper
2008Progress in photon management for full spectrum utilization with luminescent materials
Goldschmidt, J.C.; Peters, M.; Löper, P.; Schultz, O.; Dimroth, F.; Bett, A.; Gombert, A.; Glunz, S.W.; Willeke, G.
Conference Paper
2008Resonant electron tunneling through defects in GaAs tunnel diodes
Jandieri, K.; Baranovskii, S.D.; Rubel, O.; Stolz, W.; Gebhard, F.; Guter, W.; Hermle, M.; Bett, A.W.
Journal Article
2008Resonant tunneling as a dominant transport mechanism in n-GaAs/p-GaAs tunnel diodes
Jandieri, K.; Baranovskii, S.D.; Rubel, O.; Stolz, W.; Gebhard, F.; Guter, W.; Hermle, M.; Bett, A.W.
Journal Article
2008Second stage reflective and refractive optics for concentrator photovoltaics
Jaus, J.; Nitz, P.; Peharz, G.; Siefer, G.; Schult, T.; Siefer, G.; Wolf, O.; Passig, M.; Gandy, T.; Bett, A.W.
Conference Paper
2008Silicon material technology and evaluation center (SIMTEC) at Fraunhofer ISE - achievements and visions
Riepe, S.; Schumann, M.; Schmich, E.; Janz, S.; Eyer, A.; Reber, S.; Bett, A.W.; Weber, E.R.
Conference Paper
2008Spectrometric outdoor characterization of CPV modules using isotype monitor cells
Peharz, G.; Siefer, G.; Araki, K.; Bett, A.W.
Conference Paper
2008Weight reduced III-V triple junction cells for SPACE applications
Köstler, W.; Bergunde, T.; LaRoche, G.; Meusel, M.; Strobl, G.; Zimmermann, W.; Bett, A.W.; Dimroth, F.; Taylor, S.; Schülke, P.; Geens, W.
Conference Paper
2007Back-surface optimization of Germanium TPV cells
Fernandez, J.; Dimroth, F.; Oliva, E.; Hermle, M.; Bett, A.W.
Conference Paper
2007Development and production of European III-V multi-junction solar cells
Meusel, M.; Bensch, W.; Bergunde, T.; Kern, R.; Khorenko, V.; Köstler, W.; LaRoche, G.; Torunski, T.; Zimmermann, W.; Strobl, G.; Guter, W.; Hermle, M.; Hoheisel, R.; Siefer, G.; Welser, E.; Dimroth, F.; Bett, A.W.; Geens, W.; Baur, C.; Taylor, S.; Hey, G.
Conference Paper
2007Development of germanium TPV cell technology
Fernandez, J.; Dimroth, F.; Olivia, E.; Bett, A.W.
Conference Paper
2007Effects of optical coupling in III-V multilayer systems
Baur, C.; Hermle, M.; Dimroth, F.; Bett, A.W.
Journal Article
2007The FLATCON system from Concentrix Solar
Bett, A.W.; Lerchenmüller, H.
Book Article
2007Investigation and development of III-V triple-junction concentrator solar cells
Guter, W.; Dimroth, F.; Schöne, J.; Philipps, S.; Bett, A.W.
Conference Paper
2007Lattice-matched GaInAsSb on GaSb for TPV cells
Welser, E.; Dimroth, F.; Ohm, A.; Guter, W.; Siefer, G.; Philipps, S.; Schöne, J.; Polchroniadis, E.K.; Konidaris, S.; Bett, A.W.
Conference Paper
2007Material development for improved 1 eV (Galn)(NAs) solar cell structures
Volz, K.; Torunski, T.; Lackner, D.; Rubel, O.; Stolz, W.; Baur, C.; Müller, S.; Dimroth, F.; Bett, A.W.
Journal Article
2007Multijunction concentrator solar cells
Bett, A.W.; Dimroth, F.; Siefer, G.
Book Article
2007Optically powered video camera link
Böttger, G.; Dreschmann, M.; Klamouris, C.; Hübner, M.; Röger, M.; Bett, A.W.; Kueng, T.; Becker, J.; Freude, W.; Leuthold, J.
Conference Paper
2007Optimization of germanium cell arrays in tungsten emitter-based solar TPV systems
Datas, A.; Algora, C.; Corregidor, V.; Martin, D.; Bett, A.W.; Dimroth, F.; Fernandez, J.
Conference Paper
2007Photovoltaisches Konzentratormodul mit Multifunktionsrahmen
Dimroth, F.; Bett, A.; Schmidt, C.; Lerchenmueller, H.
Patent
2007The PV-FIBRE concentrator: A system for indoor operation of 1000X MJ solar cells
Anton, I.; Silva, D.; Sala, G.; Bett, A.W.; Siefer, G.; Luque-Heredia, I.; Trebst, T.
Journal Article
2007A solar TPV system based on germanium cells
Datas, A.; Algora, C.; Zamorano, J.C.; Corregidor, V.; Martín, D.; Bett, A.W.; Dimroth, F.; Fernández, J.; Baudrit, M.; Hernández, B.
Conference Paper
2007Solarzellenmodul und Verfahren zu seiner Herstellung
Jaus, J.; Bett, A.; Boesch, A.; Dimroth, F.; Lerchenmueller, H.
Patent
2007A strategic research agenda for photovoltaic solar energy technology
Sinke, W.C.; Ballif, C.; Bett, A.W.; Dimmler, B.; Dimova-Malinovska, D.; Fath, P.; Mason, N.; Ferrazza, F.; Gabler, H.; Hall, M.; Marti, A.; Mellikov, E.; Milner, A.; Mogensen, P.; Panhuber, C.; Pearsall, N.; Poortmans, J.; Protogeropoulus, C.; Sarre, G.; Sarti, D.; Strauss, P.; Topic, M.; Zolingen, R. van; Zdanowicz, T.
Conference Paper
2007Triple-junction III-V based concentrator solar cells: Perspectives and challenges
Baur, C.; Bett, A.W.; Dimroth, F.; Siefer, G.; Meusel, M.; Bensch, W.; Köstler, W.; Strobl, G.
Journal Article
20061000 sun, compact receiver based on monolithic interconnected modules (MIMS)
Löckenhoff, R.; Dibowski, G.; Dimroth, F.; Meusel, M.; Riesen, S. van; Bett, A.W.
Conference Paper
2006Accelerated indoor aging test procedure for concentrator modules
Siefer, G.; Bett, A.W.
Conference Paper
2006Calibration of III-V concentrator cells and modules
Siefer, G.; Bett, A.W.
Conference Paper
2006Characterization of monolithic III-V multi-junction solar cells - challenges and application
Meusel, M.; Baur, C.; Siefer, G.; Dimroth, F.; Bett, A.W.; Warta, W.
Conference Paper
2006Comparative TEM and HRXRD analyses of strain relaxation in step-graded GaInAs buffer-layers for high-efficiency solar cells
Schöne, J.; Spiecker, E.; Jäger, W.; Dimroth, F.; Bett, A.W.
Journal Article
2006European roadmap of multijunction solar cells and qualification status
Strobl, G.; Bergunde, T.; Köstler, W.; Kern, R.; Meusel, M.; LaRoche, G.; Zimmermann, W.; Bett, A.W.; Dimroth, F.; Geens, W.; Taylor, S.; Fernandez, E.; Gerlach, L.; Signorini, C.; Hey, G.
Conference Paper
2006Heat sink substrates for automated assembly of concentrator modules
Jaus, J.; Fleischfresser, U.; Peharz, G.; Dimroth, F.; Lerchenmüller, H.; Bett, A.W.
Conference Paper
2006Hydrogen production in a PV concentrator using III-V multi-junction solar cells
Dimroth, F.; Peharz, G.; Wittstadt, U.; Hacker, B.; Bett, A.W.
Conference Paper
2006I-V characterization of tunnel diodes and multijunction solar cells
Guter, W.; Bett, A.W.
Journal Article
2006III-V solar cell growth on wafer-bonded GaAs/Si-substrates
Schöne, J.; Dimroth, F.; Bett, A.; Tauzin, A.; Jaussaud, C.; Roussin, J.-C.
Conference Paper
2006Improving the material quality of MOVPE grown (GaIn) (NAs)
Volz, K.; Lackner, D.; Rubel, O.; Stolz, W.; Baur, C.; Dimroth, F.; Müller, S.; Bett, A.
Conference Paper
2006IV-characterization of devices consisting of solar cells and tunnel diodes
Guter, W.; Bett, A.W.
Conference Paper
2006Natural sunlight tests at petal, of A trial mim string at concentrations up to 1000X
Faiman, D.; Biryukov, S.; Bokovza, D.; Kabalo, S.; Katz, E.A.; Melnichak, V.; Bett, A.W.; Löckenhoff, R.; Zahler, C.
Conference Paper
2006Optically powered platform with Mb/s transmission over a single fiber
Klamouris, C.; Böttger, G.; Hübner, M.; Dreschmann, M.; Paulsson, K.; Bett, A.W.; Kueng, T.; Becker, J.; Freude, W.; Leuthold, J.
Conference Paper
2006Simulating single-junction GaAs solar cells including photon recycling
Letay, G.; Hermle, M.; Bett, A.W.
Journal Article
2006Simulation of the tunnelling current in heavily doped pn-junctions
Mack, B.; Hermle, M.; Philipps, S.; Bett, A.W.
Conference Paper
2006Thin 5-junction solar cells with improved radiation hardness
Dimroth, F.; Baur, C.; Bett, A.W.; Köstler, W.; Meusel, M.; Strobl, G.
Conference Paper
20053-6 junction photovoltaic cells for space and terrestrial concentrator applications
Dimroth, F.; Baur, C.; Bett, A.W.; Meusel, M.; Strobl, G.
Conference Paper
2005Advanced solar cells for missions to mars
Bett, A.W.; Campesato, R.; Flores, C.; Lurato, F.; Barde, H.; Uebele, P.; Strobl, G.; Baur, C.; Smekens, G.; Vanbegin, J.; Caon, A.
Conference Paper
2005Analysis of the radiation hardness of triple- and quintuple- junction space solar cells
Baur, C.; Meusel, M.; Dimroth, F.; Bett, A.W.; Nell, M.; Strobl, G.; Taylor, S.; Signorini, C.
Conference Paper
2005Comparison of efficiency measurements for a HCPV module with 3J cells in 3 sites
Araki, K.; Emery, K.; Siefer, G.; Bett, A.W.; Sakakibara, T.; Kemmoku, Y.; Ekins-Daukes, N.J.; Lee, H.S.; Yamaguchi, M.
Conference Paper
2005Degradation study of III-V solar cells for concentrator applications
Riesen, S. van; Bett, A.W.
Journal Article
2005Detection angle resolved PIXE and the equivalent depth concept for thin film characterization
Reis, M.A.; Chaves, P.C.; Corregidor, V.; Barradas, N.P.; Alves, E.; Dimroth, F.; Bett, A.W.
Conference Paper
2005Determination of the temperature coefficients of various III-V solar cells
Siefer, G.; Abbott, P.; Baur, C.; Schlegl, T.; Bett, A.W.
Conference Paper
2005Development of FLATCON® modules
Mohr, A.; Siefer, G.; Roth, T.; Sadchikov, N.A.; Bett, A.W.; Glunz, S.W.; Willeke, G.P.
Conference Paper
2005Development status of European multi-junction space solar cells with high radiation hardness
Meusel, M.; Baur, C.; Guter, W.; Hermle, M.; Dimroth, F.; Bett, A.W.; Bergunde, T.; Dietrich, R.; Kern, R.; Köstler, W.; Nell, M.; Zimmermann, W.; LaRoche, G.; Strobl, G.; Taylor, S.; Signorini, C.; Hey, G.
Conference Paper
2005Evolution of fully European triple GaAs solar cells
Strobl, G.; Dietrich, R.; Hilgarth, J.; Kern, R.; Köstler, W.; LaRoche, G.; Meusel, M.; Poeck, D.; Rasch, K.D.; Zimmermann, W.; Bett, A.W.; Dimroth, F.; Taylor, S.; Signorini, C.; Schuelke, P.; Hey, G.
Conference Paper
2005Experimental comparison between the power outputs of FLATCON/spl reg/ modules and silicon flat plate modules
Siefer, G.; Bett, A.W.
Conference Paper
2005The FLATCON® concentrator pv-technology ready for the market
Bett, A.W.; Siefer, G.; Baur, C.; Riesen, S.V.; Peharz, G.; Lerchenmüller, H.; Dimroth, F.
Conference Paper
2005FLATCON® Konzentrator-PV-Technologie
Lerchenmüller, H.; Bett, A.W.; Siefer, G.; Dimroth, F.; Willeke, G.
Conference Paper
2005FULLSPECTRUM: A new PV wave making more efficient use of the solar spectrum
Marti, A.; Bett, A.; Andreev, V.M.; Jaussaud, C.; Roosmalen, J.A.M. van; Alonso, J.; Räuber, A.; Strobl, G.; Stolz, W.; Algora, C.; Bitnar, B.; Gombert, A.; Stanley, C.; Wahnon, P.; Conesa, J.; Sark, W.G.J.H.M. van; Meijerink, A.; Klink, G. van; Barnham, K.; Danz, R.; Meyer, T.; Luque-Heredia, I.; Kenny, R.; Christodes, C.; Sala, G.; Benítez, P.
Conference Paper
2005GaSb based PV modules for a TPV generator system
Schlegl, T.; Abbott, P.; Aicher, T.; Dimroth, F.; Siefer, G.; Szolak, R.; Bett, A.W.
Conference Paper
2005Growth and structural characterization of GaInAsSb films on GaSb substrates
Amariei, A.; Polychroniadis, E.K.; Dimroth, F.; Bett, A.W.
Journal Article
2005Investigation of Ge component cells
Baur, C.; Meusel, M.; Dimroth, F.; Bett, A.W.
Conference Paper
2005Large area monolithic interconnected modules (MIMS) for compact concentrator modules
Loeckenhoff, R.; Riesen, S. van; Meusel, M.; Dimroth, F.; Bett, A.W.
Conference Paper
2005Large area monolithic interconnected modules (MIMS) for compact concentrator modules
Loeckenhoff, R.; Riesen, S. van; Meusel, M.; Dimroth, F.; Bett, A.W.
Conference Paper
2005Measurement uncertainties of the calibration of multi-junction solar cells
Baur, C.; Bett, A.W.
Conference Paper
2005Metamorphic GaInP-GalnAs layers for photovoltaic applications
Bett, A.W.; Baur, C.; Dimroth, F.; Schöne, J.
Conference Paper
2005Modeling of III-V multi-junction cells based on spectrometric characterisation
Baur, C.; Bett, A.W.
Conference Paper
2005Progress on "CONMAN" EU R&D project - improvement of photovoltaic concentrating systems and technology transfer to a manufacturer
Browne, W.; Wheldon, A.; Norton, M.; Iborra, A.; Villlarejo, J.; Jodar, E.; Glunz, S.; Mohr, A.; Roth, T.; Bett, A.W.; Gawehns, N.; McCann, M.; Fath, P.; Jimenez, J.; Alcedo, L.; Bremerich, M.; Clive, B.; Andreu, J.; Weatherby, C.; Bentley, R.; Brooker, J.; Wheeler, S.; Teruel, J.
Conference Paper
2005Recent developments in III-V multi-junction space solar cells
Bett, A.W.; Baur, C.; Dimroth, F.; Guter, W.; Meusel, M.; Strobl, G.
Conference Paper
2005Simulation of single junction GaAs solar cells considering optical coupling
Hermle, M.; Letay, G.; Mack, B.; Bett, A.W.
Conference Paper
2005Tunnel diodes for III-V multi-junction solar cells
Guter, W.; Dimroth, F.; Meusel, M.; Bett, A.W.
Conference Paper
2004Cell-mounted spectral filters for thermophotovoltaic applications
Abbott, P.; Bett, A.W.
Conference Paper
2004Characterization of GaSb-based heterostructures by scanning electron microscope cathodoluminescence and scanning tunnelling microscope
Storgards, J.; Méndez, B.; Piqueras, J.; Chenot, M.; Dimroth, F.; Bett, A.W.
Journal Article
2004Comparison of dilute nitride growth on a single- and 8×4-inch multiwafer MOVPE system for solar cell applications
Dimroth, F.; Baur, C.; Bett, A.W.; Volz, K.; Stolz, W.
Journal Article
2004Development of a novel TPV power generator
Aicher, T.; Kästner, P.; Gopinath, A.; Gombert, A.; Bett, A.W.; Schlegl, T.; Hebling, C.; Luther, J.
Conference Paper
2004High external quantum efficiency of planar semiconductor structures
Catchpole, K.R.; Lin, K.L.; Campbell, P.; Green, M.A.; Bett, A.W.; Dimroth, F.
Journal Article
2004MOVPE growth of Sb-based semiconductors in a 9x2-inch planetary® reactor
Giesen, C.; Heuken, M.; Dimroth, F.; Bett, A.W.; Hannappel, T.; Kollonitsch, Z.; Möller, K.; Seip, M.; Greiling, A.
Conference Paper
2004Optimized 9×2-inch MOVPE reactor for the growth of Al-containing antimonides
Dimroth, F.; Bett, A.W.; Giesen, C.; Heuken, M.
Journal Article
2004RBS analysis of AlGaSb thin films
Barradas, N.P.; Alves, E.; Ruiz, C.M.; Dieguez, E.; Dimroth, F.; Chenot, M.-A.; Bett, A.
Conference Paper
2004Tandem cells for very high concentration
Bett, A.W.
Book Article
20035-Junction III-V solar cells for space applications
Dimroth, F.; Baur, C.; Meusel, M.; Riesen, S. van; Bett, A.W.
Conference Paper
2003Accelerated aging tests on III-V single- and multi-junction solar cells
Riesen, S. van; Bett, A.W.; Willeke, G.
Conference Paper
2003Advanced GaInP/Ga(In)As/Ge triple junction space solar cells
Strobl, G.; Dietrich, R.; Hilgarth, J.; Köstler, W.; Kern, R.; Nell, M.; Rothenbacher, S.; Bett, A.W.; Dimroth, F.; Meusel, M.; Campesato, R.; Flores, C.; Timo, G.; Smekens, G.; Vanbegin, J.; Raskin, G.; Geens, W.; LaRoche, G.; Hey, G.; Signorini, C.; Taylor, S.
Conference Paper
2003Beschleunigte Alterung von III/V Solarzellen
Riesen, S. van; Bett, A.W.
Conference Paper
2003Calculating the generation function of III-V solar cells
Letay, G.; Breselge, M.; Bett, A.W.
Conference Paper
2003Characterisation of a 300 x photovoltaic concentrator system with one- axis tracking
Hein, M.; Dimroth, F.; Siefer, G.; Bett, A.W.
Journal Article
2003Correlation of reduced oxygen content in precursors with improved MOVPE layer quality
Rushworth, S.A.; Smith, L.M.; Ravetz, M.S.; Coward, K.M.; Odedra, R.; Kanjolia, R.; Bland, S.W.; Dimroth, F.; Bett, A.W.
Journal Article
2003Development of a 1.0 eV (GaIn)(NAs) solar cell
Baur, C.; Bett, A.W.; Dimroth, F.; Riesen, S. van; Kunert, B.; Traversa, M.; Volz, K.; Stolz, W.
Conference Paper
2003Fabrication of MIM-GaAs solar cells for high concentration PV
Riesen, S. van; Dimroth, F.; Bett, A.W.
Conference Paper
2003Flatcon-modules. Technology and characterisation
Bett, A.W.; Baur, C.; Dimroth, F.; Lange, G.; Meusel, M.; Riesen, S. van; Siefer, G.; Andreev, V.M.; Rumyantsev, V.D.; Sadchikov, N.A.
Conference Paper
2003GaSb photovoltaic cells for applications in TPV generators
Bett, A.W.; Sulima, O.V.
Journal Article
2003GaSb-, InGaAsSb-, InAsSbp- and Ge-TPV cells for low-temperature TPV applications
Sulima, O.V.; Bett, A.W.; Mauk, M.G.; Dimroth, F.; Dutta, P.S.; Mueller, R.L.
Conference Paper
2003Growth of Sb-based materials by MOVPE
Dimroth, F.; Agert, C.; Bett, A.W.
Journal Article
2003High external quantum efficiency from double heterostructure layers as selective emitters in thermophotonic systems
Lin, K.; Catchpole, K.R.; Trupke, T.; Campbell, P.; Green, M.A.; Aberle, A.G.; Corkish, R.; Bett, A.W.; Dimroth, F.
Conference Paper
2003High external quantum efficieny from double heterostructured layers as selective emitters in thermophotonic systems
Lin, K.; Catchpole, K.R.; Trupke, T.; Campbell, P.; Green, M.A.; Aberle, A.G.; Corkish, R.; Bett, A.W.; Dimroth, F.
Conference Paper
2003Measurement and comparison of the ratio, of the direct beam to normal hemispherical solar spectra, in various parts of the world
Faiman, D.; Karnieli, A.; Ninari, N.; Melnichak, V.; Karki, I.; Bett, A.W.; Siefer, G.; Borg, N. van der; Burgers, A.R.; Dunlop, E.D.
Conference Paper
2003Non-empirical modelization of space degradation of multijunction cells
Bourgoin, J.C.; Zazoui, M.; Makham, S.; Hadrami, M.; Sun, G.G.; Signorini, C.; Taylor, S.J.; Strobl, G.; Dietrich, R.; Bett, A.W.; Guard, O.
Conference Paper
2003The PV fibre project: A PV concentrator for indoor operation of 1000X MJ solar cells by fibre transmission
Sala, G.; Anton, I.; Bett, A.W.; Luque-Heredia, I.; Trebst, T.
Conference Paper
2003Silicon concentrator cells designed for a direct mounting on compound parabolic concentrator
Mohr, A.; Steuder, M.; Bett, A.W.; Glunz, S.W.
Conference Paper
2003Spectral response measurements of monolithic GaInP/Ga(In)As/Ge triple-junction solar cells: Measurement artifacts and their explanation
Meusel, M.; Baur, C.; Letay, G.; Bett, A.W.; Warta, W.; Fernandez, E.
Journal Article
2002Advanced GaInP/Ga(In)As/Ge triple-junction space solar cells
Strobl, G.; Hilgarth, J.; Nell, M.; Dietrich, R.; Kern, R.; Köstler, W.; Bett, A.W.; Dimroth, F.; Schubert, U.; Flores, C.; Campesato, R.; Timo, G.; LaRoche, G.; Signorini, C.; Bogus, K.
Conference Paper
2002Characterisation of a 25% high-efficiency fresnel lens module with GaInP/GaInAs dual-junction concentrator solar cells
Hein, M.; Meusel, M.; Baur, C.; Dimroth, F.; Lange, G.; Siefer, G.; Tibbits, T.N.D.; Bett, A.W.; Andreev, V.M.; Rumyantsev, V.D.
Conference Paper
2002Development of III-V-Based concentrator cells and their application in PV-modules
Bett, A.W.; Dimroth, F.; Hein, F.; Lange, G.; Meusel, M.; Schubert, U.; Siefer, G.
Conference Paper
2002Development of III-V-based concentrator solar cells and their application in PV-modules
Bett, A.W.; Dimroth, F.; Hein, M.; Lange, G.; Meusel, M.; Schubert, U.; Siefer, G.
Conference Paper
2002Diffusion on Zn in TPV materials: GaSb, InGaSb, InGaAsSb and InAsSbP
Sulima, O.V.; Bett, A.W.; Mauk, M.G.; Ber, B.Y.; Dutta, P.S.
Conference Paper
2002GaAs photovoltaic cells for laser power beaming at high power densities
Riesen, S. van; Schubert, U.; Bett, A.W.
Conference Paper
2002GaSb-, InGaAsSb-, InGaSb-, InAsSbP- and Ge-TPV cells with diffused emitters
Sulima, O.V.; Bett, A.W.; Dutta, P.S.; Mauk, M.G.; Müller, R.L.
Conference Paper
2002Gasb-InGaSb and Ge-TPV cells with diffused emitters
Sulima, O.V.; Bett, A.W.; Dutta, P.S.; Mauk, M.G.; Mueller, R.L.
Journal Article
2002Hochkonzentrierende Photovoltaik: Modulwirkungsgrade bis zu 25%
Bett, A.W.
Conference Paper
2002Influence of the simulator spectrum on the calibration of multi-junction solar cells under concentration
Siefer, G.; Baur, C.; Meusel, M.; Dimroth, F.; Bett, A.W.; Warta, W.
Conference Paper
2002Origin of the photoluminescence line at 0.8 eV in undoped and Si-doped GaSb grown by MOVPE
Agert, C.; Gladkov, P.S.; Bett, A.W.
Journal Article
2002Spectral mismatch correction and spectrometric characterization of monolithic III-V multi-junction solar cells
Meusel, M.; Adelhelm, R.; Dimroth, F.; Bett, A.W.; Warta, W.
Journal Article
2001Advanced III-V solar cell structures grown by MOVPE
Bett, A.W.; Adelhelm, R.; Agert, C.; Beckert, R.; Dimroth, F.; Schubert, U.
Journal Article
2001Characterisation of a high concentration system with one-axis-tracking
Hein, M.; Bett, A.W.; Dimroth, F.; Siefer, G.
Conference Paper
2001Determination of absolute external quantum efficiency of monolithic triple junction solar cells
Beckert, R.; Meusel, M.; Siefer, G.; Warta, W.; Bett, A.W.
Conference Paper
2001Fabrication and simulation of GaSb thermophotovoltaik cells
Sulima, O.V.; Bett, A.W.
Journal Article
2001High-efficiency (AlGa)As/GaAs solar cells grown by MOVPE using TBAs and low temperatures and low V/III-ratios
Agert, C.; Dimroth, F.; Schubert, U.; Bett, A.W.; Leu, S.; Stolz, W.
Journal Article
2001Metamorphic GayIn1-yP/Ga1-xInxAs tandem solar cells for space and for terrestrial concentrator applications at C > 1000 suns
Dimroth, F.; Beckert, R.; Meusel, M.; Schubert, U.; Bett, A.W.
Journal Article
2001MOVPE of GaSb, (AlGa)Sb and (AlGa)(AsSb) in a multiwafer planetary reactor
Agert, C.; Lanyi, P.; Bett, A.W.
Journal Article
200025,5% efficient Ga(0,35)In(0,65)P/Ga(0,83)In(0,17)As tandem solar cells grown on GaAs substrates
Dimroth, F.; Schubert, U.; Bett, A.W.
Journal Article
200030 per cent monolithic tandem concentrator solar cells for concentrations exceeding 1000 suns
Bett, A.W.; Dimroth, F.; Lange, G.; Meusel, M.; Beckert, R.; Hein, M.; Riesen, S.V.; Schubert, U.
Conference Paper
2000All-glass terrestrial concentrator modules based on composite fresnel lenses and III-V solar cells
Andreev, A.; Rumyantsev, V.D.; Shvarts, M.Z.; Bett, A.W.; Dimroth, F.; Hein, M.; Letay, G.; Sulima, O.V.
Conference Paper
2000Anodic oxidation of GaSb in Acid-glycol-water electrolytes
Sulima, O.; Bett, A.; Wagner, J.
Journal Article
2000Characterization and simulation of GaSb device-related properties
Stollwerck, G.; Sulima, O.V.; Bett, A.W.
Journal Article
2000Concentrator array based on GaAs cells and fresnel lens concentrator
Andreev, A.; Bett, A.W.; Dimroth, F.; Hein, M.; Letay, G.; Rumyantsev, V.D.; Shvarts, M.Z.; Sulima, O.V.
Conference Paper
2000Development of Ga(5.51)In(0.49)P/GaAs tandem solar cells on an industrial size MOVPE reactor
Bett, A.W.; Dimroth, F.; Meusel, M.; Schubert, U.; Adelhelm, R.
Conference Paper
2000Growth of antimony-based materials in a multiwafer planetary MOVPE-reactor
Agert, C.; Lanyi, P.; Sulima, O.V.; Stolz, W.; Bett, A.W.
Journal Article
2000High C-doping of MOVPE grown thin Al(x)Ga(1-x)As layers for AlGaAs/GaAs interband tunneling devices
Dimroth, F.; Schubert, U.; Bett, A.W.; Schienle, F.
Conference Paper
2000High C-doping of MOVPE grown thin AlxGa1-xAs layers for AlGaAs/GaAs interband tunneling devices
Dimroth, F.; Schubert, U.; Schienle, F.; Bett, A.W.
Journal Article
2000InGaAsSb photovoltaic cells with enhanced open-circuit voltage
Sulima, O.V.; Beckert, R.; Bett, A.W.; Cox, J.A.; Mauk, M.G.
Conference Paper
2000Liquid-phase epitaxy of low-bandgap III-V antimonides for thermophotovoltaic devices
Mauk, M.G.; Shellenbarger, Z.A.; Cox, J.A.; Sulima, O.V.; Bett, A.W.; Müller, R.L.; Sims, P.E.; Mc Neely, J.B.; Netta, L.C. di
Journal Article
2000Low oxygen content trimethylaluminium and trimethylindium for MOVPE of light emitting devices
Smith, L.M.; Rushworth, S.A.; Ravetz, M.S.; Odedra, R.; Konjolia, R.; Agert, C.; Dimroth, F.; Schubert, U.; Bett, A.W.
Journal Article
2000MOVPE grown Ga(1-x)In(x)As solar cells for GaInP/GaInAs tandem applications
Dimroth, F.; Lanyi, P.; Schubert, U.; Bett, A.W.
Conference Paper
2000MOVPE grown Ga1-xInxAs solar cells for GaInP/GaInAs tandem applications
Dimroth, F.; Lanyi, P.; Schubert, U.; Bett, A.W.
Journal Article
2000New lattice mismatched GaIn/GaInAs tandem solar cell concepts for high efficiency space- and terrestrial concentrator solar cells
Dimroth, F.; Lanyi, P.; Meusel, M.; Schubert, U.; Bett, A.W.
Conference Paper
2000Procedures for evaluating multijunction concentrators
Emery, K.; Moriarty, T.; Kurtz, S.; Meusel, M.; Beckert, R.; Dimroth, F.; Bett, A.W.; Warta, W.
Conference Paper
2000Progress in development of All-glass terrestrial concentrator modules based on composite fresnel lenses and III-V solar cells
Rumyantsev, V.D.; Andreev, V.M.; Bett, A.W.; Dimroth, F.; Hein, M.; Lamge, G.; Shvarts, M.Z.; Sulima, O.V.
Conference Paper
2000Radiation response of dual-junction Ga(x)In(1-x)P/Ga(y)In(1-y)As solar cells
Walters, R.J.; Summers, G.P.; Bett, A.W.; Dimroth, F.; Hofmann, R.W.; Stan, M.A.; Takamoto, T.; Ikeda, E.
Conference Paper
2000Radiation response of dual-junction Ga(y)In(1-y)P/Ga(1-x)In(x)As solar cells
Dimroth, F.; Bett, A.W.; Walters, R.J.; Summers, G.P.; Messenger, S.R.; Takamoto, T.; Ikeda, E.; Imaizumi, M.; Anzawa, O.; Matsuda, S.
Conference Paper
2000Radiation response of dual-junction GayIn1-yP/Ga1- xInxAs solar-cells
Dimroth, F.; Bett, A.W.; Walters, R.J.; Summers, G.P.; Messenger, S.R.; Takamoto, T.; Ikeda, E.; Imaizumi, M.; Anzawa, O.; Matsuda, S.
Conference Paper
2000Radiation response of Ga(x)In(1-x)As solar cells
Walters, R.J.; Messenger, S.R.; Summers, G.P.; Bett, A.W.; Dimroth, F.; Hoffmann, R.-W.; Stan, M.A.; Takamoto, T.; Ikeda, E.; Imaizumi, M.; Anzawa, O.; Matsuda, S.
Conference Paper
2000Recent progress in the development of III-V solar and thermophotovoltaic cells
Dimroth, F.; Sulima, O.V.; Bett, A.W.
Journal Article
2000Thermophotovoltaic cells on zinc diffused poly-crystalline GaSb
Sulima, O.V.; Bett, A.W.; Dutta, P.S.; Ehsani, H.; Gutmann, R.J.
Conference Paper
1999Development of GaInP/GaAs tandem solar cells on GaAs and germanium substrates
Dimroth, F.; Lanyi, P.; Schubert, U.; Bett, A.W.
Conference Paper
1999III-V Compounds for solar cell Applications
Bett, A.W.; Dimroth, F.; Stollwerck, G.; Sulima, O.V.
Journal Article
1999Pseudo-closed box diffusion of Zn into InGaAsSb and AlGaSb for TPV devices
Bett, A.W.; Ber, B.Y.; Mauk, M.G.; South, J.T.; Sulima, O.V.
Conference Paper
1998Highest efficiency GaAs/GaSb tandem concentrator module
Bett, A.W.; Stollwerk, G.; Sulima, O.V.; Wettling, W.
Conference Paper
1997Simplification of process technology for high-efficiency solar cells
Bett, A.W.; Glunz, S.W.; Knobloch, J.; Schindler, J.; Wettling, W.
Conference Paper
1996Herstellung und Charakterisierung von Al(0.26)Ga(0.74)As-Solarzellen für die Tandem-Konzentrator-Anwendung
Bett, A.W.; Dimroth, F.; Stollwerck, G.; Sulima, O.V.; Wettling, W.
Conference Paper
1996High-efficiency Dünnschicht- und Konzentrator-Solarzellen aus Galliumarsenid: Abschlußbericht des Forschungsvorhabens
Bett, A.W.; Wettling, W. ; Fraunhofer-Institut für Solare Energiesysteme -ISE-, Freiburg/Brsg.
Report
1996Simulation und Entwicklung von GaSb-Solarzellen mit hohem Wirkungsgrad
Stollwerck, G.; Sulima, O.V.; Bett, A.W.; Keser, S.; Baldus, A.
Conference Paper
1996Transmissionline-Messungen und ihre Übertragbarkeit auf Solarzellen
Blug, A.; Stollwerck, G.; Blieske, U.; Bett, A.W.
Conference Paper
1996Zn-Diffusion für eine GaSb-Photovoltaikzelle
Bett, A.W.; Keser, S.; Stollwerck, G.; Sulima, O.V.
Conference Paper
1995Etchback-regrowth process for AIGaAs/GaAs solar cells with built-in electric fields
Bett, A.W.; Baldus, A.; Blug, A.; Mintairov, A.M.; Namazov, A.; Sulima, O.V.
Conference Paper
1995Etchback-regrowth process for AlGaAs/GaAs solar cell structures
Baldus, A.; Blieske, U.; Sulima, O.; Wettling, W.; Bett, A.W.
Conference Paper
1995GaAs/Si Heteroepitaxie mittels LPE/MOCVD
Baldus, A.; Bett, A.W.; Blieske, U.; Duong, T.; Sulima, O.V.; Wettling, W.
Abstract
1995Investigations of GaAs growth from Bi-based melts of solar cells
Baldus, A.; Sulima, O.; Wettling, W.; Bett, A.W.
Conference Paper
1995Konzentratormodule als Alternative zu Flachmodulen bei Hochleistungsanwendung
Bett, A.W.; Mohring, H.D.
Conference Paper
1995Optimierung von GaAs-Sz für die Tandem-Konzentrator-Anwendung
Blieske, U.; Baldus, A.; Blug, A.; Bett, A.W.; Schumacher, J.; Sterk, S.
Abstract
1995Verringerung des Kontaktwiderstandes von AuMn auf LPE-GaAs-Solarzellen mittels Nachdiffusion von Zink aus der Gasphase
Bett, A.W.; Blieske, U.; Duong, T.; Schetter, C.; Sulima, O.V.
Abstract
1994AlGaAs/GaAs solar cells grown by horizontal and vertical LPE etchback-regrowth process
Baldus, A.; Blieske, U.; Sulima, O.; Wettling, W.; Bett, A.W.
Conference Paper
1994AlGaAs/GaAs Solarzellen mit hohem Wirkungsgrad für Konzentrator-Module
Blieske, U.; Baldus, A.; Lutz, F.; Duong, T.; Schetter, C.; Sulima, O.; Wettling, W.; Bett, A.W.
Abstract
1994GaAS one-sun and concentrator solar cells based on LPE-ER grown structures
Baldus, A.; Blieske, U.; Duong, T.; Lutz, F.; Sulima, O.; Schetter, C.; Wettling, W.; Bett, A.W.
Conference Paper
1994LPE-GaAs and LBSF-Si solar cells for tandem concentrator application
Blieske, U.; Sterk, S.; Schumacher, J.; Wettling, W.; Marti, A.; Terron, M.J.; Luque, A.; Bett, A.W.
Conference Paper
1994Optimization of GaAs solar cells for application in concentrator modules
Blieske, U.; Duong, T.; Schetter, C.; Sulima, O.; Bett, A.W.
Conference Paper
1994Selective MOVPE-growth of GaAs on Si for photovoltaic devices
Zieger, K.; Strauss, P.; Scholz, F.; Frankowsky, G.; Hangleiter, A.; Blieske, U.; Schetter, C.; Lutz, F.; Frese, V.; Bett, A.W.
Conference Paper
1993High-throughput two-melt LPE fabrication of AlGaAs/GaAs solar cells
Habich, A.; Nguyen, T.T.T.; Sulima, O.V.; Welter, H.; Wettling, W.; Bett, A.W.
Conference Paper
1993Optimization of optical properties of graded-xAlxGa1-xAs window layers on LPE-grown GaAs solar cells
Habermann, G.; Lutz, F.; Schetter, C.; Sulima, O.V.; Wettling, W.; Bett, A.W.
Conference Paper
1992GaAs-on-Si solar cell structures grown by MBE and LPE
Borgwarth, K.; Sulima, O.V.; Wettling, W.; Schetter, C.; Bett, A.W.
Conference Paper
1991Investigations of emitter characteristics of LPE GaAs solar cells
Welter, H.; Ehrhardt, A.; Wettling, W.; Bett, A.W.
Conference Paper
1991Optimization of LPE-grown high efficiency GaAs solar cells
Cardona, S.; Ehrhardt, A.; Lutz, F.; Welter, H.; Wettling, W.; Bett, A.W.
Conference Paper
1991Transient photoluminescence decay study of minority carrier lifetime in GaAs heteroface solar cell structures
Ehrhardt, A.; Wettling, W.; Bett, A.W.
Journal Article
1990Dünnschichtsolarzellen aus Galliumarsenid
Bronner, W.; Ehrhardt, A.; Lanyi, P.; Lutz, F.; Welter, H.; Yavas, O.; Schetter, C.; Wettling, W.; Bett, A.W.; Nguyen, T.N.
Conference Paper
1990Transient photoluminescence decay investigations of LPE GaAs heteroface solar cells
Ehrhardt, A.; Lutz, F.; Wettling, W.; Bett, A.W.
Conference Paper
1990Zur Abschätzung von Schichtdicke und Versetzungsdichte bei der Heteroepitaxie mittels Rockingkurvenmessungen
Lanyi, P.; Yavas, O.; Bronner, W.; Bett, A.W.
Conference Paper
1989High efficiency isothermal LPE grown GaAs solar cells with high fill factor
Lutz, F.; Nguyen, T.; Wettling, W.; Bett, A.W.
Conference Paper
1989Homogeneity evaluation of GaAs LPE solar cell processing by photoluminescence mapping and photoluminescence decay measurements
Ehrhardt, A.; Krawczyk, S.K.; Schohe, K.; Wettling, W.; Bett, A.W.
Conference Paper
1988Die Bedeutung der GaAlAs-Schicht für die GaAs-Solarzelle
Nguyen, T.; Lutz, F.; Bett, A.W.
Abstract
1988Homogeneity of the local carrier lifetime in GaAs solar cells
Lutz, F.; Louis, T.; Leo, K.; Bett, A.W.
Conference Paper
This publication list has been generated from the publication database Fraunhofer-Publica.