Imbedded Perovskite Nanocrystals in Metal Halide Microcrystal: Synthesis and Heterostructure

Lead halide perovskite nanocrystals and other metal halides have received considerable attention due to their unique optoelectronic properties. A combined perovskite nanocrystal-metal halide heterostructure can achieve desirable properties for enriched applications. However, the construction of such a heterostructure is challenging. In this study, a CsPbBr3/Cs2ZnBr4 heterostructured microcrystal with perovskite nanocrystals embedded in a metal halide matrix is successfully synthesized using a facile ultrasound-assisted post-processing method. The heterostructure of the perovskite-metal halide composite materials is fully deciphered through ab initio calculations and multiscale characterizations. The heterostructure-induced variation in optical properties is elucidated based on micro-nano spectral and luminescence kinetic behaviors. This study provides new insights into the design of perovskite nanocrystal-based heterostructured materials, improving the understanding of metal halides and extending their applications. A CsPbBr3/Cs2ZnBr4 heterostructured microcrystal with perovskite nanocrystals embedded in metal halide matrix is designed and synthesized utilizing a facile ultrasound-assisted post-processing method. This study provides novel insights regarding the design of perovskite nanocrystal-based heterostructured materials, contributing to a better understanding of metal halide and extending its applications.image