Cadmium-Free Kesterite Thin-Film Solar Cells with High Efficiency Approaching 12.

ABSTRACT: Cadmium sulfide (CdS) buffer layer is commonly used in Kesterite Cu₂ ZnSn(S,Se)₄ (CZTSSe) thin film solar cells. However, the toxicity of Cadmium (Cd) and perilous waste, which is generated during the deposition process (chemical bath deposition), and the narrow bandgap (≈2.4 eV) of CdS restrict its large-scale future application. Herein, the atomic layer deposition (ALD) method is proposed to deposit zinc-tin-oxide (ZTO) as a buffer layer in Ag-doped CZTSSe solar cells. It is found that the ZTO buffer layer improves the band alignment at the Ag-CZTSSe/ZTO heterojunction interface. The smaller contact potential difference of the ZTO facilitates the extraction of charge carriers and promotes carrier transport. The better p-n junction quality helps to improve the open-c

SUBMITTER: Ahmad N 

PROVIDER: S-EPMC10502672 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature