MANUFACTURING CIS THIN FILM SOLAR CELL AND FORMING COPPER-INDIUM-SELENIUM ALLOY

摘要

PROBLEM TO BE SOLVED: To improve the photoelectric conversion efficiency avoiding peel of a CIS layer of a solar cell by forming a Se layer or Se-containing layer adjacent to a conductive layer by plating. SOLUTION: A Cr layer 2 and Mo (conductive) layer thereon are sputtered on a soda lime glass 1 to form a substrate, and Se or Se-containing layer 4 is formed thereon by plating pref. electroplating to make a more smooth surface of the Se layer 4. For forming a Se or Se alloy layer by electroplating, a plating bath contg. a selenium dioxide water soln. (selenious) acid with sulfuric acid is pref. A brightener such as sodium citrate is pref. added to further reduce the uneven thickness.