Interfaces of high-efficiency kesterite Cu2ZnSnS(e)4 thin film solar cells
Gao Shoushuai1, Jiang Zhenwu1, Wu Li2, Ao Jianping1, †, Zeng Yu1, Sun Yun1, Zhang Yi1, ‡
       

(color online) Band energy diagram of Zn(O,S) as a function of O/(S+O). Reproduced with permission from Refs. [31] and [32].