Development of III-V-based concentrator solar cells and their application in PV-modules

Author

Bett, A.W. ; Dimroth, F. ; Hein, M. ; Lange, G. ; Meusel, M. ; Schubert, U. ; Siefer, G.

Author_Institution

Fraunhofer Inst. for Solar Energy Syst., Freiburg, Germany

fYear

2002

fDate

19-24 May 2002

Firstpage

844

Lastpage

847

Abstract

Concentrators have a great potential to achieve cost reduction for solar generated electricity. In this work III-V-based concentrator solar cells for high concentration levels were fabricated. Monolithic and mechanically stacked multi-junction cells were investigated achieving efficiencies up to 33.5 % at C=308 (AM1.5d, 1000W/m², 25°C). The cells are employed in point-focus Fresnel lens modules. All-glass hermetized modules designed for a concentration level of 120 and 500 obtained efficiencies of up to 24.8 % and 21.7 %, respectively. The modules were characterized under outdoor conditions at Freiburg, Germany.

Keywords

III-V semiconductors; photovoltaic cells; solar cells; 21.7 percent; 24.8 percent; 25 C; 33.5 percent; III-V-based concentrator solar cells; PV-modules; cost reduction; efficiencies; high concentration levels; point-focus Fresnel lens modules; Costs; Epitaxial growth; Gallium arsenide; Lattices; Lenses; Photovoltaic cells; Power generation; Solar energy; Solar power generation; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference, 2002. Conference Record of the Twenty-Ninth IEEE

ISSN

1060-8371

Print_ISBN

0-7803-7471-1

Type

conf

DOI

10.1109/PVSC.2002.1190711

Filename

1190711