Cu(In,Ga)Se2 thin film solar cells and modules are an excellent choice for space applications, due to their high radiation hardness and power-to-mass ratios. Best suited substrate materials are titanium foils and polyimide. The successful transfer of the standard deposition processes on glass to these substrates is demonstrated by CIGS single cells on titanium reaching efficiencies of 14.2% (AM 1.5) on small area (0.5 cm2) and 13.3% (AM 1.5) on large area (27 cm 2) as well as CIGS single cells on polyimide foil with efficiencies of 11.2% (AM 1.5) on small area (0.5 cm2). For the production of monolithically integrated CIGS modules on flexible substrates photolithographic patterning techniques were developed. In addition, for modules on titanium foils SiOx isolation barriers were applied. With these methods it was possible to produce CIGS modules on foil substrates reaching AM 1.5 efficiencies of 7.5% on small area (46 cm2) and 3.8% on large area (467 cm2).
Flexible and lightweight Cu(in,Ga)Se2 thin film solar modules for space applications
2005
6 Seiten, 9 Quellen
Conference paper
English
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