Halide insertion regulation for efficient and stable wide-bandgap perovskite photovoltaics.

ABSTRACT: Wide-bandgap (WBG) perovskite solar cells (PSCs) are employed for tandem solar cells. Understanding the crystallization mechanism of mixed-halide WBG perovskite will contribute to achieving the high-performance photovoltaics. Herein, we demonstrate that the asynchronous halide insertion is accompanied by random crystal facets and orientations, restricting the efficient carrier extraction. Guided by density functional theory calculations, we construct a π-conjugated molecular wall structure using o-phenylenediamine (OPD). The molecular wall at the grain boundary induces templated perovskite crystallization through the ortho-diamine group, enabling synchronous [PbBr₆]^4- and [PbI₆]^4- halide insertion. The OPD-treated perovskite film exhibits a prefe

SUBMITTER: Song Z 

PROVIDER: S-EPMC12783802 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature