Direct photoinduced synthesis of lead halide perovskite nanocrystals and nanocomposites

All-inorganic CsPbX3 (X = Cl, Br, and I) perovskite nanocrystals (PeNCs) and nanocomposites have shown great promise in optoelectronics and photovoltaics. However, it remains notoriously difficult to control over perovskite nanocomposites at a single particle level. Herein, we report a unique photoinduced method for the controlled synthesis of CsPbX3 PeNCs and nanocomposites based on the light-triggered breakage of the covalent carbon-halogen bond of haloalkanes. The use of molecular haloalkanes as unreactive halide source provides a mild reaction condition, which enables in situ confined growth of CsPbX3 PeNCs in mesoporous nanospheres such as silica with well-defined morphology. As a result, a variety of multifunctional perovskite nanocomposites can be achieved through photoinduced confined growth of PeNCs in mesoporous silica coated nanoparticles. These findings provide a general approach for synthesizing CsPbX3 PeNCs and nanocomposites, which may open up new opportunities for perovskite-based material or device engineering towards versatile applications. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

A unique photoinduced method for the controlled synthesis of CsPbX3 perovskite nanocrystals and nanocomposites has been successfully developed, enabling the creation of multifunctional perovskite nanocomposites. This approach may open up new opportunities for perovskite-based material or device engineering.