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Preparation of cuxinygazsen precursor films and powders by electroless deposition

United States Patent

5,976,614
November 2, 1999
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A method for electroless deposition of Cu.sub.x In.sub.y Ga.sub.z Se.sub.n (x=0-2, y=0-2, z=0-2, n=0-3) precursor films and powders onto a metallic substrate comprising: preparing an aqueous bath solution of compounds selected from the group consisting of: I) a copper compound, a selenium compound, an indium compound and gallium compound; II) a copper compound, a selenium compound and an indium compound; III) a selenium compound, and indium compound and a gallium compound; IV) a selenium compound and a indium compound; and V) a copper compound and selenium compound; each compound being present in sufficient quantity to react with each other to produce Cu.sub.x In.sub.y Ga.sub.z Se.sub.n (x=0-2, y=0-2, z=0-2, n=0-3); adjusting the pH of the aqueous bath solution to an acidic value by the addition of a dilute acid; and initiating an electroless reaction with an oxidizing counterelectrode for a sufficient time to cause a deposit of Cu.sub.x In.sub.y Ga.sub.z Se.sub.n (x=0-2, y=0-2, z=0-2, n=0-3) from the aqueous bath solution onto a metallic substrate.
Bhattacharya; Raghu N. (Littleton, CO), Batchelor; Wendi Kay (Lakewood, CO), Wiesner; Holm (Golden, CO), Ramanathan; Kannan (Golden, CO), Noufi; Rommel (Golden, CO)
Midwest Research Institute (Kansas City, MO)
09/ 170,840
October 13, 1998
CONTRACTUAL ORIGIN OF THE INVENTION This United States Government has rights in this invention pursuant to Contract No. DE-AC3683CH10093 between the U.S. Department of Energy and the National Renewable Energy Laboratory, a Division of Midwest Research Institute.