Defect Synergistic Regulations of Li&Na Co-Doped Flexible Cu₂ ZnSn(S,Se)₄ Solar Cells Achieving over 10% Certified Efficiency.

ABSTRACT: Ion doping is an effective strategy for achieving high-performance flexible Cu₂ ZnSn(S,Se)₄ (CZTSSe) solar cells by defect regulations. Here, a Li&Na co-doped strategy is applied to synergistically regulate defects in CZTSSe bulks. The quality absorbers with the uniformly distributed Li and Na elements are obtained using the solution method, where the acetates (LiAc and NaAc) are as additives. The concentration of the harmful Cu_Zn anti-site defects is decreased by 8.13% after Li incorporation, and that of the benign Na_Zn defects is increased by 36.91% after Na incorporation. Synergistic Li&Na co-doping enhances the carrier concentration and reduces the interfacial defects concentration by one order of magnitude. As a result, the flexible CZTSSe s

SUBMITTER: Sun Q 

PROVIDER: S-EPMC10853737 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature