Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2019Comprehensive Electrical Loss Analysis of Monolithic Interconnected Multi-Segment Laser Power Converters
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Zeitschriftenaufsatz
20180.5-Gb/s OFDM-Based Laser Data and Power Transfer Using a GaAs Photovoltaic Cell
Fakidis, J.; Videv, S.; Helmers, H.; Haas, H.
Zeitschriftenaufsatz
2018Luminescent Coupling in Multi-Junction Photovoltaic Devices Studied by Transient Voltage Measurements
Tayagaki, T.; Reichmuth, S.K.; Helmers, H.; Siefer, G.
Vortrag
2018On the influence of the photo-induced leakage current in monolithically interconnected modules
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Zeitschriftenaufsatz
2018Optische Leistungsversorgung für Sensorsysteme mittels photovoltaischer Laserleistungszellen
Helmers, H.
Vortrag
2018Photovoltaisches Halbleiterbauelement zur Konversion von Strahlungsleistung in elektrische Leistung, Verfahren zu dessen Herstellung und dessen Verwendung
Helmers, Henning; Höhn, Oliver; Walker, Alexandre Wiliam
Patent
2018Power loss mechanisms in small area monolithic-interconnected photovoltaic modules
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Zeitschriftenaufsatz
2018Power-by-Light - Optical Power Transmission Based on Photovoltaic Laser Power Converters
Helmers, H.
Vortrag
2018Transient Analysis of Luminescent Coupling Effects in Multi-junction Solar Cells
Tayagaki, T.; Reichmuth, K.; Helmers, H.; Siefer, G.
Zeitschriftenaufsatz
2017GaInP/AlGaAs metal-wrap-through tandem concentrator solar cells
Oliva, E.; Salvetat, T.; Jany, C.; Thibon, R.; Helmers, H.; Steiner, M.; Schachtner, M.; Beutel, P.; Klinger, V.; Moulet, J.-S.; Dimroth, F.
Zeitschriftenaufsatz, Konferenzbeitrag
2017Multi-segment photovoltaic laser power converters and their electrical losses
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Konferenzbeitrag
2017On the alignment tolerance of photovoltaic laser power converters
Wagner, L.; Bett, A.W.; Helmers, H.
Zeitschriftenaufsatz
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.
Zeitschriftenaufsatz
2017Power loss mechanisms in monolithic-interconnected six-segment laser power converter
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Vortrag
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.
Zeitschriftenaufsatz
2016Determining the optimal laser wavelength for laser power conversion depending on operation temperature
Höhn, O.; Walker, A.W.; Bett, A.W.; Helmers, H.
Konferenzbeitrag
2016III-V multi-junction Metal-Wrap-Through (MWT) concentrator solar cells
Oliva, E.; Salvetat, T.; Jany, C.; Thibon, R.; Helmers, H.; Steiner, M.; Schachtner, M.; Beutel, P.; Klinger, V.; Moulet, J.; Dimroth, F.
Konferenzbeitrag
2016Influence of injection current and temperature on electroluminescence of GaAs laser power converters
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Vortrag
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.
Konferenzbeitrag
2016Optical power supply of smart sensors using photovoltaic laser power converters
Helmers, H.
Vortrag
2016Optimal laser wavelength for efficient laser power converter operation over temperature
Höhn, O.; Walker, A.W.; Bett, A.W.; Helmers, H.
Zeitschriftenaufsatz
2016Photovoltaic laser power converters for wireless optical power supply of sensor systems
Helmers, H.; Bett, A.W.
Konferenzbeitrag
2016Spatial and spectral electroluminescence for single-junction single-segment GaAs laser power converter characterization
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M.
Vortrag
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.
Zeitschriftenaufsatz
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.
Konferenzbeitrag
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.
Zeitschriftenaufsatz
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.
Konferenzbeitrag
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.
Zeitschriftenaufsatz
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.
Konferenzbeitrag
2014III-V Solarzellen für die optische Leistungsübertragung
Helmers, Henning
Vortrag
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.
Konferenzbeitrag
2014Modeling of concentrating photovoltaic and thermal systems
Helmers, H.; Bett, A.W.; Parisi, J.; Agert, C.
Zeitschriftenaufsatz
2014Photovoltaic cells for optical power and data transmission
Helmers, H.; Philipps, S.P.; Reichmuth, S.K.; Oliva, E.; Lackner, D.; Bett, A.W.
Vortrag
2014Photovoltaic cells for optical power and data transmission
Helmers, H.
Vortrag
2014Temperature-dependent electroluminescence and voltages of multi-junction solar cells
Karcher, C.; Helmers, H.; Schachtner, M.; Dimroth, F.; Bett, A.W.
Zeitschriftenaufsatz
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.
Konferenzbeitrag
2013Bandgap determination based on electrical quantum efficiency
Helmers, H.; Karcher, C.; Bett, A.W.
Zeitschriftenaufsatz
2013Cogeneration of photovoltaic electricity and heat using concentrated solar radiation
Helmers, H.
Dissertation
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.
Konferenzbeitrag
2013Influence of temperature and irradiance on triple-junction solar subcells
Helmers, H.; Schachtner, M.; Bett, A.W.
Zeitschriftenaufsatz
2013The Interaction of Standards and Innovation: Hybrid Photovoltaic-thermal Collectors
Kramer, K.; Helmers, H.
Zeitschriftenaufsatz
2013Investigations on the influence of temperature and concentration on solar cell performances
Helmers, H.; Schachtner, M.; Bett, A.W.
Konferenzbeitrag
2013Ko-Generation von Elektrizität und Wärme aus konzentriertem Sonnenlicht: Überblick über Technologie und Anwendungen
Helmers, H.
Aufsatz in Buch
2013Multi-linear performance model for hybrid (C)PVT solar collectors
Helmers, H.; Kramer, K.
Zeitschriftenaufsatz
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.
Zeitschriftenaufsatz
2013Photovoltaische Zellen zur optischen Leistungsübertragung
Helmers, H.
Vortrag
2013Temperature dependent electroluminescence and voltages of multi-junction solar cells
Karcher, C.; Helmers, H.; Schachtner, M.; Dimroth, F.; Bett, A.W.
Konferenzbeitrag
2012Advanced concepts in concentrating photovoltaics (CPV)
Wiesenfarth, M.; Helmers, H.; Philipps, S.P.; Steiner, M.; Bett, A.W.
Konferenzbeitrag
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.
Konferenzbeitrag
2012Outdoor test setup for concentrating photovoltaic and thermal (CPVT) systems
Helmers, H.; Boos, A.; Jetter, F.; Heimsath, A.; Wiesenfarth, M.; Bett, A.W.
Konferenzbeitrag
2011Halbleiterbauelement im Mehrschichtaufbau und hieraus gebildetes Modul
Wiesenfarth, Maike; Guter, Wolfgang; Helmers, Henning
Patent
2011Recent advances in the development and testing of hybrid PV-thermal collectors
Dupeyrat, P.; Helmers, H.; Fortuin, S.; Kramer, K.
Konferenzbeitrag
2010Advanced processing techniques used for the development of dual-junction monolithic interconnected modules
Helmers, H.; Oliva, E.; Bronner, W.; Dimroth, F.; Bett, A.W.
Konferenzbeitrag
2010Processing techniques for monolithic interconnection of solar cells at wafer level
Helmers, H.; Olivia, E.; Bronner, W.; Dimroth, F.; Bett, A.W.
Zeitschriftenaufsatz
2009Increasing the efficiency of fluorescent concentrator systems
Goldschmidt, J.C.; Peters, M.; Bösch, A.; Helmers, H.; Dimroth, F.; Glunz, S.W.; Willeke, G.
Zeitschriftenaufsatz