Shallow-level defect passivation by 6H perovskite polytype for highly efficient and stable perovskite solar cells.

ABSTRACT: The power conversion efficiency of perovskite solar cells continues to increase. However, defects in perovskite materials are detrimental to their carrier dynamics and structural stability, ultimately limiting the photovoltaic characteristics and stability of perovskite solar cells. Herein, we report that 6H polytype perovskite effectively engineers defects at the interface with cubic polytype FAPbI₃, which facilitates radiative recombination and improves the stability of the polycrystalline film. We particularly show the detrimental effects of shallow-level defect that originates from the formation of the most dominant iodide vacancy (V_I⁺) in FAPbI₃. Furthermore, additional surface passivation on top of the hetero-polytypic perovskite film resul

SUBMITTER: Kim H 

PROVIDER: S-EPMC11224362 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature