Interfaces of high-efficiency kesterite Cu<sub>2</sub>ZnSnS(e)<sub>4</sub> thin film solar cells

Interfaces of high-efficiency kesterite Cu₂ZnSnS(e)₄ thin film solar cells

Gao Shoushuai¹, Jiang Zhenwu¹, Wu Li², Ao Jianping^{1, †}, Zeng Yu¹, Sun Yun¹, Zhang Yi^{1, ‡}

(color online) Schema of band alignment at buffer/absorber interface: (a) cliff like, (b) and spike like Spike and cliff are barriers for photo-generated and injection electrons, respectively. Reproduced with permission from Ref. [15].