Surface Reconstruction in Quasi-2D Perovskite Films Treated with Cesium Halide Nanocrystals: Halide Exchange or Phase Transformation.

ABSTRACT: The formation of heterostructure interfaces from quantum dots (or nanocrystals) and lower-dimensional (2D or quasi-2D) materials enables interfacial and optoelectronic property tuning. However, this strategy has not been sufficiently characterized, for example, the application of cesium halide nanocrystals to quasi-2D perovskite structures is underexplored, and the mechanisms of the resulting structural modifications and specific nanocrystal roles are not fully understood. Herein, the effects of postsynthetically surface-modifying quasi-2D perovskite films with CsX (X = Cl, Br, I) nanocrystals are examined to bridge this gap. The purposeful choice of X enables the selective induction of halide exchange or a structural phase transformation at the nanocrystal-perovskite interfa

SUBMITTER: Son DI 

PROVIDER: S-EPMC12412550 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature