Regulating Air‐Annealing Time for Boosting the Performance of Cu2ZnSn(S, Se)4 Solar Cells

• DOI: 10.1002/solr.202300769
• Publication Date: 2023-11-21T14:27:31Z
• Authors: Guonan Cui; Xin Zhao; Yanchun Yang; Junting Ren; Yanqing Liu; Rui Wang; Lulu Bai; Yiming Wang; Chengjun Zhu; Xiaogong Lv
• Keywords: 7. Clean energy; 01 natural sciences; 0104 chemical sciences

Excellent morphology and low harmful defect states of the absorber layer are essential to fabricate high‐performance Cu 2 ZnSn(S, Se) 4 (CZTSSe) devices. Herein, annealing time precursor films in air is proved have much impact on quality performance Appropriately extending air‐annealing can promote diffusion Na into O absorption surface films, boost growth crystal grain, lessen density band‐tailing absorber. The appropriate extension also regulates electrical properties efficiency CZTSSe devices enhanced from 6.92% (1 min) 10.1% (7 min), with decreased V OC, Def . These demonstrate that regulating be a simple direct way for improving