Heteronanocrystals Based on Halide Perovskites and Chalcogenides

Halide perovskite nanocrystals (PNCs) have developed into one of the most promising classes of material. For their applications in photoelectric/photovoltaic devices, how to increase the separation/extraction of the photoinduced charge carrier is the most important research topic. Recently, syntheses of heteronanocrystals (HNCs) based on perovskites and binary/ternary chalcogenides (ZnS, CdS, PbS, CdSe, PbSe, PbTe, Pb₄S₃Br₂, Pb₄S₃Cl₂, Pb_xBi_yS_z, AgBiS₂, etc.) have been developed due to their advanced functionalities in surface passivation and wave function engineering, leading to better controllability in carrier recombination or separation tailored for different applications. However, because of the totally different growth dynamics between perovskites (ionic crystals) and chalcogenides (covalent crystals), progress in the synthesis of HNCs has had less development. This Mini-Review systematically discusses the synthetic methods, photoelectric characteristics, and device performances of HNCs over recent years and presents the remaining challenges and future opportunities to further promote the development of high-efficiency HNCs.