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Hydrogen Production in a PV Concentrator using III-V Multi-Junction Solar Cells

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5 Author(s)
F. Dimroth ; Fraunhofer Institute for Solar Energy Systems, Heidenhofstr. 2, D-79110 Freiburg, Germany. e-mail: ; G. Peharz ; U. Wittstadt ; B. Hacker
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Multi-junction solar cells from III-V compound semiconductors can generate ideal voltages for the electrolysis of water. This paper presents results of a PV-concentrator HyConreg with Ga0.35In0.65P/Ga0.83In0.17As tandem solar cells which are directly connected to the electrodes of a local polymer electrolyte membrane electrolyser. This electrolyser is integrated into the base plate of a concentrator module. A prototype system with an area of 96 cm2 has been realized. The solar to hydrogen conversion efficiency of this system was measured outdoor in Freiburg to be 18.2% (based on the thermoneutral voltage of 1.485 V)

Published in:

2006 IEEE 4th World Conference on Photovoltaic Energy Conference  (Volume:1 )

Date of Conference:

May 2006