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| 2021 | Integrated series/parallel connection for photovoltaic laser power converters with optimized current matching
Wagner, L.; Reichmuth, S.K.; Philipps, S.P.; Oliva, E.; Bett, A.W.; Helmers, H. | Zeitschriftenaufsatz |
| 2021 | Voltage losses due to the perimeter and dark area in micro-concentrator solar cells
Wiesenfarth, M.; Steiner, M.; Helmers, H.; Bett, A.W. | Zeitschriftenaufsatz |
| 2020 | 51% Efficient Photonic Power Converters for O-Band Wavelengths around 1310 nm
Helmers, H.; Franke, A.; Lackner, D.; Höhn, O.; Predan, F.; Dimroth, F. | Konferenzbeitrag |
| 2020 | 6-W Optical Power Link with Integrated Optical Data Transmission
Helmers, H.; Armbruster, C.; Ravenstein, Moritz von; Derix, D.; Schöner, C. | Zeitschriftenaufsatz |
| 2020 | Development and analysis of wafer-bonded four-junction solar cells based on antimonides with 42% efficiency under concentration
Predan, F.; Höhn, O.; Lackner, D.; Franke, A.; Helmers, H.; Dimroth, F. | Zeitschriftenaufsatz |
| 2020 | Power-by-Light or How to Reach an Efficiency of 68%?
Helmers, H. | Vortrag |
| 2020 | Simultaneous Wireless Data and Power Transfer for a 1-Gb/s GaAs VCSEL and Photovoltaic Link
Fakidis, J.; Helmers, H.; Haas, H. | Zeitschriftenaufsatz |
| 2019 | 5 W Optical Power Link with Generic Voltage Output and Modulated Data Signal
Haid, M.; Armbruster, C.; Derix, D.; Schöner, C.; Helmers, H. | Vortrag |
| 2019 | Comprehensive Electrical Loss Analysis of Monolithic Interconnected Multi-Segment Laser Power Converters
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M. | Zeitschriftenaufsatz |
| 2019 | GaAs Multi-Junction Laser Power Converters at AZUR SPACE. Current Status and Development Activities
Keller, G.; Fuhrmann, D.; Wierzowski, T.; Volk, A.-K.; Fuhrmann, B.; Horst, L.; Wächter, C.; Schauerte, M.; Helmers, H.; Khorenko, V. | Vortrag |
| 2019 | Highly Efficient III-V Based Photovoltaic Laser Power Converters
Helmers, H.; Höhn, O.; Lackner, D.; Lopez, E.; Ruiz-Preciado, L.; Schauerte, M.; Siefer, G.; Dimroth, F.; Bett, A.W. | Vortrag |
| 2018 | 0.5-Gb/s OFDM-Based Laser Data and Power Transfer Using a GaAs Photovoltaic Cell
Fakidis, J.; Videv, S.; Helmers, H.; Haas, H. | Zeitschriftenaufsatz |
| 2018 | Luminescent Coupling in Multi-Junction Photovoltaic Devices Studied by Transient Voltage Measurements
Tayagaki, T.; Reichmuth, S.K.; Helmers, H.; Siefer, G. | Vortrag |
| 2018 | On the influence of the photo-induced leakage current in monolithically interconnected modules
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M. | Zeitschriftenaufsatz |
| 2018 | Optische Leistungsversorgung für Sensorsysteme mittels photovoltaischer Laserleistungszellen
Helmers, H. | Vortrag |
| 2018 | Photovoltaisches Halbleiterbauelement zur Konversion von Strahlungsleistung in elektrische Leistung, Verfahren zu dessen Herstellung und dessen Verwendung
Helmers, Henning; Höhn, Oliver; Walker, Alexandre Wiliam | Patent |
| 2018 | Power loss mechanisms in small area monolithic-interconnected photovoltaic modules
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M. | Zeitschriftenaufsatz |
| 2018 | Power-by-Light - Optical Power Transmission Based on Photovoltaic Laser Power Converters
Helmers, H. | Vortrag |
| 2018 | Transient Analysis of Luminescent Coupling Effects in Multi-junction Solar Cells
Tayagaki, T.; Reichmuth, S.K.; Helmers, H.; Siefer, G. | Zeitschriftenaufsatz |
| 2017 | GaInP/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 |
| 2017 | Multi-segment photovoltaic laser power converters and their electrical losses
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M. | Konferenzbeitrag |
| 2017 | On the alignment tolerance of photovoltaic laser power converters
Wagner, L.; Bett, A.W.; Helmers, H. | Zeitschriftenaufsatz |
| 2017 | On 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 |
| 2017 | Power loss mechanisms in monolithic-interconnected six-segment laser power converter
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M. | Vortrag |
| 2017 | Reliable 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 |
| 2016 | Determining the optimal laser wavelength for laser power conversion depending on operation temperature
Höhn, O.; Walker, A.W.; Bett, A.W.; Helmers, H. | Konferenzbeitrag |
| 2016 | III-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 |
| 2016 | Influence of injection current and temperature on electroluminescence of GaAs laser power converters
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M. | Vortrag |
| 2016 | Integrated 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 |
| 2016 | Optical power supply of smart sensors using photovoltaic laser power converters
Helmers, H. | Vortrag |
| 2016 | Optimal laser wavelength for efficient laser power converter operation over temperature
Höhn, O.; Walker, A.W.; Bett, A.W.; Helmers, H. | Zeitschriftenaufsatz |
| 2016 | Photovoltaic laser power converters for wireless optical power supply of sensor systems
Helmers, H.; Bett, A.W. | Konferenzbeitrag |
| 2016 | Spatial and spectral electroluminescence for single-junction single-segment GaAs laser power converter characterization
Kimovec, R.; Helmers, H.; Bett, A.W.; Topic, M. | Vortrag |
| 2016 | Temperature 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 |
| 2016 | Transient 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 |
| 2015 | A 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 |
| 2015 | Impact 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 |
| 2015 | Impact 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 |
| 2015 | Photovoltaic 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 |
| 2014 | III-V Solarzellen für die optische Leistungsübertragung
Helmers, Henning | Vortrag |
| 2014 | Lightning-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.K.; Helmers, H.; Bett, A.W.; Vourvoulakis, J.; Freude, W.; Leuthold, J.; Stork, W. | Konferenzbeitrag |
| 2014 | Modeling of concentrating photovoltaic and thermal systems
Helmers, H.; Bett, A.W.; Parisi, J.; Agert, C. | Zeitschriftenaufsatz |
| 2014 | Photovoltaic cells for optical power and data transmission
Helmers, H.; Philipps, S.P.; Reichmuth, S.K.; Oliva, E.; Lackner, D.; Bett, A.W. | Vortrag |
| 2014 | Photovoltaic cells for optical power and data transmission
Helmers, H. | Vortrag |
| 2014 | Temperature-dependent electroluminescence and voltages of multi-junction solar cells
Karcher, C.; Helmers, H.; Schachtner, M.; Dimroth, F.; Bett, A.W. | Zeitschriftenaufsatz |
| 2013 | Advanced 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 |
| 2013 | Bandgap determination based on electrical quantum efficiency
Helmers, H.; Karcher, C.; Bett, A.W. | Zeitschriftenaufsatz |
| 2013 | Cogeneration of photovoltaic electricity and heat using concentrated solar radiation
Helmers, H. | Dissertation |
| 2013 | Efficiency 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 |
| 2013 | Influence of temperature and irradiance on triple-junction solar subcells
Helmers, H.; Schachtner, M.; Bett, A.W. | Zeitschriftenaufsatz |
| 2013 | The Interaction of Standards and Innovation: Hybrid Photovoltaic-thermal Collectors
Kramer, K.; Helmers, H. | Zeitschriftenaufsatz |
| 2013 | Investigations on the influence of temperature and concentration on solar cell performances
Helmers, H.; Schachtner, M.; Bett, A.W. | Konferenzbeitrag |
| 2013 | Ko-Generation von Elektrizität und Wärme aus konzentriertem Sonnenlicht: Überblick über Technologie und Anwendungen
Helmers, H. | Aufsatz in Buch |
| 2013 | Multi-linear performance model for hybrid (C)PVT solar collectors
Helmers, H.; Kramer, K. | Zeitschriftenaufsatz |
| 2013 | Optical 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 |
| 2013 | Photovoltaische Zellen zur optischen Leistungsübertragung
Helmers, H. | Vortrag |
| 2013 | Temperature dependent electroluminescence and voltages of multi-junction solar cells
Karcher, C.; Helmers, H.; Schachtner, M.; Dimroth, F.; Bett, A.W. | Konferenzbeitrag |
| 2012 | Advanced concepts in concentrating photovoltaics (CPV)
Wiesenfarth, M.; Helmers, H.; Philipps, S.P.; Steiner, M.; Bett, A.W. | Konferenzbeitrag |
| 2012 | Front-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 |
| 2012 | Outdoor test setup for concentrating photovoltaic and thermal (CPVT) systems
Helmers, H.; Boos, A.; Jetter, F.; Heimsath, A.; Wiesenfarth, M.; Bett, A.W. | Konferenzbeitrag |
| 2011 | Halbleiterbauelement im Mehrschichtaufbau und hieraus gebildetes Modul
Wiesenfarth, Maike; Guter, Wolfgang; Helmers, Henning | Patent |
| 2011 | Recent advances in the development and testing of hybrid PV-thermal collectors
Dupeyrat, P.; Helmers, H.; Fortuin, S.; Kramer, K. | Konferenzbeitrag |
| 2010 | Advanced processing techniques used for the development of dual-junction monolithic interconnected modules
Helmers, H.; Oliva, E.; Bronner, W.; Dimroth, F.; Bett, A.W. | Konferenzbeitrag |
| 2010 | Processing techniques for monolithic interconnection of solar cells at wafer level
Helmers, H.; Olivia, E.; Bronner, W.; Dimroth, F.; Bett, A.W. | Zeitschriftenaufsatz |
| 2009 | Increasing the efficiency of fluorescent concentrator systems
Goldschmidt, J.C.; Peters, M.; Bösch, A.; Helmers, H.; Dimroth, F.; Glunz, S.W.; Willeke, G. | Zeitschriftenaufsatz |