Controlled Li Alloying by Postsynthesis Electrochemical Treatment of Cu₂ZnSn(S, Se)₄ Absorbers for Solar Cells.

ABSTRACT: Li-alloying of Cu₂ZnSn(S, Se)₄ (CZTSSe) absorbers is widely accepted for its beneficial influence on the performance of CZTSSe-based thin film solar cells. Given the degraded morphology characteristic of absorbers synthesized in the presence of excess Li concentrations, it is speculated that Li may be best incorporated into the absorber after synthesis. Here, we report an innovative method to add Li to synthesized CZTSSe by an electrochemical treatment using a liquid electrolyte. Our approach decouples Li addition from absorber synthesis, allowing one to possibly overcome morphology issues associated with high Li concentration. We show that Li is thereby transferred to the absorber and is incorporated into the crystal lattice. The resulting Li concentration in the abs

SUBMITTER: Moser S 

PROVIDER: S-EPMC10751737 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature