Heterojunction formed via 3D-to-2D perovskite conversion for photostable wide-bandgap perovskite solar cells.

ABSTRACT: Light-induced halide segregation constrains the photovoltaic performance and stability of wide-bandgap perovskite solar cells and tandem cells. The implementation of an intermixed two-dimensional/three-dimensional heterostructure via solution post-treatment is a typical strategy to improve the efficiency and stability of perovskite solar cells. However, owing to the composition-dependent sensitivity of surface reconstruction, the conventional solution post-treatment is suboptimal for methylammonium-free and cesium/bromide-enriched wide-bandgap PSCs. To address this, we develop a generic three-dimensional to two-dimensional perovskite conversion approach to realize a preferential growth of wider dimensionality (n ≥ 2) atop wide-bandgap perovskite layers (1.78 eV). This technique involves de

SUBMITTER: Wen J 

PROVIDER: S-EPMC10628126 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature