Impressive self-healing phenomenon of Cu2ZnSn(S, Se)4 solar cells<xref rid="cpb_27_6_066108_fn1" ref-type="fn">*</xref><fn id="cpb_27_6_066108_fn1"> <label>*</label> Project supported by the National Natural Science Foundation of China (Grant Nos. 91733301, 51761145042, 91433205, 11474333, 51421002, 51627803, and 51572288) and the International Partnership Program of the Chinese Academy of Sciences (Grant No. 112111KYSB20170089). </fn>

Impressive self-healing phenomenon of Cu₂ZnSn(S, Se)₄ solar cells* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 91733301, 51761145042, 91433205, 11474333, 51421002, 51627803, and 51572288) and the International Partnership Program of the Chinese Academy of Sciences (Grant No. 112111KYSB20170089).

Yu Qing^{1, 2}, Shi Jiangjian¹, Zhang Pengpeng^{1, 2}, Guo Linbao^{1, 2}, Min Xue^{1, 2}, Luo Yanhong^{1, 2}, Wu Huijue¹, Li Dongmei^{1, 2, †}, Meng Qingbo^{1, 2, ‡}

(color online) (a) Comparison of the time-dependent charge carrier densities in the CZTSSe absorber film solar cells at 300 K determined by C–V (N_cv) and DLCP (N_dl). The dashed line indicates the depletion width at 0-V bias. (b) Photoluminescence (PL) spectrum and Tauc plots calculated from ultraviolet–visible measurements of CZTSSe absorber films before and after storage.