Patent Number: 7,611,573

Title: ZnS/Zn(O,OH)S-based buffer layer deposition for solar cells

Abstract: The invention provides CBD ZnS/Zn(O,OH)S and spray deposited ZnS/Zn(O,OH)S buffer layers prepared from a solution of zinc salt, thiourea and ammonium hydroxide dissolved in a non-aqueous/aqueous solvent mixture or in 100% non-aqueous solvent. Non-aqueous solvents useful in the invention include methanol, isopropanol and triethyl-amine. One-step deposition procedures are described for CIS, CIGS and other solar cell devices.

Inventors: Bhattacharya; Raghu N. (Littleton, CO)

Assignee: Alliance for Sustainable Energy, LLC

International Classification: C09K 3/00 (20060101); B05D 5/00 (20060101); H01L 31/0296 (20060101); H01L 31/032 (20060101)

Expiration Date: 1/03/02017