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Preparation of CIGS-based solar cells using a buffered electrodeposition bath

United States Patent

November 20, 2007
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A photovoltaic cell exhibiting an overall conversion efficiency of at least 9.0% is prepared from a copper-indium-gallium-diselenide thin film. The thin film is prepared by simultaneously electroplating copper, indium, gallium, and selenium onto a substrate using a buffered electro-deposition bath. The electrodeposition is followed by adding indium to adjust the final stoichiometry of the thin film.
Bhattacharya; Raghu Nath (Littleton, CO)
Davis, Joseph & Negley (Mill Valley, CA)
10/ 627,322
July 25, 2003
REFERENCE TO GOVERNMENT This invention was made with Government support under NREL-WFO-1326, Prime contract No. DE-AC36-83CH10093 awarded by the Department of Energy. The Government has certain rights in this invention.