Guter, W., Schöne, J., Philipps, S.P., Steiner, M., Siefer, G., Wekkeli, A., ...
A metamorphic Ga0.35In0.65P/Ga0.83In0.17As/Ge triple-junction solar cell is shown to provide current-matching of all three subcells and thus composes a device structure with virtually ideal band gap...
A simple method for quantifying spectral impacts on multi-junction solar cells (2009)
Peharz, G., Siefer, G., Bett, A.W.
A method to quantify spectral effects on the electric parameters of multi-junction solar cells is presented. The method is based on measuring the short circuit current of at least two monitor cells....
Outdoor evaluation of FLATCON® modules and systems (2008)
Bett, A.W., Jaus, J., Peharz, G., Siefer, G., Hakenjos, A., Heile, I., ...
This paper reviews outdoor performance measurements conducted on FLATCON® modules and systems. It highlights the influence of spectra, humidity, temperature, and acceptance angle on the module...
Spectrometric outdoor characterization of CPV modules using isotype monitor cells (2008)
Peharz, G., Siefer, G., Araki. K., Bett, A.W.
In this paper we present a method to investigate the impact of the solar spectrum on the output parameters of a CPV module equipped with triple-junction solar cells. The changes of the sun´s...
Second stage reflective and refractive optics for concentrator photovoltaics (2008)
Jaus, J., Nitz, P., Peharz, G., Siefer, G., Schult, T., Siefer, G., ...
In this paper we report on research activities at the Fraunhofer Institute for Solar Energy Systems (ISE) in the area of secondary optics for concentrator modules. The underlying module technology is...
Triple-junction III-V based concentrator solar cells: Perspectives and challenges (2007)
Baur, C., Bett, A.W., Dimroth, F., Siefer, G., Meusel, M., Bensch, W., ...
This paper gives a review of the work performed in the framework of the EC-funded project FULLSPECTRUM aiming for higher photovoltaic (PV) conversion efficiencies by investigating GaInP/GaInAs/Ge...
The PV-FIBRE concentrator: A system for indoor operation of 1000X MJ solar cells (2007)
Anton, I., Silva, D., Sala, G., Bett, A.W., Siefer, G., Luque-Heredia, I., ...
This paper describes the overall design and experimental results obtained with the PV-FIBRE concentrator system (CPV). This system uses a parabolic dish to collect and concentrate the sunlight which...
Development and production of European III-V multi-junction solar cells (2007)
Meusel, M., Bensch, W., Bergunde, T., Kern, R., Khorenko, V., Köstler, W., ...
Characterization of monolithic III-V multi-junction solar cells - challenges and application (2006)
Meusel, M., Baur, C., Siefer, G., Dimroth, F., Bett, A.W., Warta, W.
The characterization of monolithic III-V multi-junction solar cells is still a challenging task. In this paper we show that quantum efficiency measurements have to be performed under optimized light-...
Lattice-matched GaInAsSb on GaSb for TPV cells (2006)
Welser, E., Dimroth, F., Ohm, A., Guter, W., Siefer, G., Schöne, J., ...
FLATCON® Konzentrator-PV-Technologie (2005)
Lerchenmüller, H., Bett, A.W., Siefer, G., Dimroth, F., Willeke, G.
GaSb based PV modules for a TPV generator system (2005)
Schlegl, T., Abbott, P., Aicher, T., Dimroth, F., Siefer, G., Szolak, R., ...
Development of FLATCON® modules (2005)
Mohr, A., Siefer, G., Roth, T., Sadchikov, N.A., Bett, A.W., Glunz, S.W., ...
The FLATCON® concentrator pv-technology ready for the market (2005)
Bett, A.W., Siefer, G., Baur, C., Riesen, S.V., Peharz, G., Lerchenmüller, H., ...
Characterisation of a 300 x photovoltaic concentrator system with one- axis tracking (2003)
Hein, M., Dimroth, F., Siefer, G., Bett, A.W.
A solar concentrator with one-axis tracking is being developed at our institute. This concentrator system achieves a high geometrical concentration ratio of 300 using a parabolic trough mirror and a...
Flatcon-modules. Technology and characterisation (2003)
Bett, A.W., Baur, C., Dimroth, F., Lange, G., Meusel, M., Riesen, S. Van, ...
Development of III-V-Based concentrator cells and their application in PV-modules (2002)
Bett, A.W., Dimroth, F., Hein, F., Lange, G., Meusel, M., Schubert, U., ...
Hein, M., Meusel, M., Baur, C., Dimroth, F., Lange, G., Siefer, G., ...
In this paper a 192 cm2 high efficiency Fresnel lens module is presented. An outdoor efficiency of up to 24.9 % was measured. The module uses Ga 0.35 In 0.65 P/Ga 0.83 In 0.17 As dual-junction...
Hein, M., Meusel, M., Baur, C., Dimroth, F., Lange, G., Siefer, G., ...
In this paper a 192 cm2 high efficiency Fresnel lens module is presented. An outdoor efficiency of up to 24.9 % was measured. The module uses Ga 0.35 In 0.65 P/Ga 0.83 In 0.17 As dual-junction...
Development of III-V-Based concentrator cells and their application in PV-modules (2002)
Bett, A.W., Dimroth, F., Hein, F., Lange, G., Meusel, M., Schubert, U., ...