Visualization of Anion Vacancy Defect Annihilation in CZTSe Solar Cells by Hydrogen-Assisted Selenization with In Operando X-ray Nanoprobe Studies.

ABSTRACT: The traditional sulfur selenization process in Cu₂ZnSn(S,Se)₄ (CZTSSe) solar cell fabrication often results in the creation of localized anion vacancies (V_S and V_Se). These vacancies are considered harmful defects as they can trap carriers generated by light, leading to reduced solar cell efficiency. Moreover, concrete evidence has been lacking on the extent of the impact caused by these anion vacancies. Our research introduces a novel approach: the hydrogen-assisted selenization (HAS) process, specifically designed to minimize localized anion vacancies in Cu₂ZnSnSe₄ (CZTSe) solar cells. Our investigation, utilizing current-voltage (I-V) and admittance spectroscopy measurements, provides clear ins

SUBMITTER: Huang CY 

PROVIDER: S-EPMC11615846 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature