METHOD FOR MANUFACTURING PHOTOELECTRIC CONVERSION ELEMENT, AND ELECTRODE FOR LIGHT WATER ELECTROLYSIS

摘要

PROBLEM TO BE SOLVED: To provide: a method for manufacturing a photoelectric conversion element that has a high photoelectric conversion efficiency; and an electrode for light water electrolysis, which is utilized for hydrogen production through water electrolysis.SOLUTION: A method for manufacturing a photoelectric conversion element includes: a first step of forming a Cu-Zn-Sn-based metal layered film including a Cu film, an Sn film and a Zn film, using an electrodeposition method on a substrate; a second step of annealing the Cu-Zn-Sn-based metal layered film to form a Cu-Zn-Sn-based metal alloy precursor; and a third step of sulfurizing the Cu-Zn-Sn-based metal alloy precursor to form a CZTS film. The CZTS film formed through the third step has a surface having a surface roughness of 0.5 μm or less.