Department of Electrical and Computer Engineering, Wakayama National College of Technology, Gobo, Wakayama 644-0023, Japan;
Industrial Technology Center of Wakayama Prefecture, 60 Ogura, Wakayama-shi, 649-6261, Japan;
Cu(In; Ga)Se2Thin; Film; Solar; Cell; High; Ga; Content; Sulfur; Incorporation; Sequential; Evaporation;