Fast Synthesis of Highly Luminescent Two-dimensional Tin-halide Perovskites by Anti-solvent Method

In recent years, lead halide perovskites have attracted extensive attention due to their remarkable optoelectronic properties. However, the toxicity of lead in materials has greatly hindered their large-scale commercial applications. Therefore, it is very important to find lead-free halide perovskite materials with similar photoelectric properties as lead halide perovskite materials. Among the lead-free halide perovskites, tin-halide perovskite is considered as one of the best substitutes for lead based perovskite materials. Herein, a series of novel two-dimensional(2D) (RNH3)(2)SnX4(R is alkyl chain, X=Br-, I-) perovskite materials was synthesized by a simple antisolvent method, which have excellent fluorescence emission properties with photoluminescence quantum yield(PLQY) up to 98%. It was found that the prepared materials are more stable than 3D ASnX(3)-type[A=Cs+, methylammonium(MA(+)), formamidinium(FA(+))] ones. This work lays a foundation for the industrial application of metal halide perovskite materials in solid-state lighting devices and display devices.

Automated summary

This study synthesized a series of novel two-dimensional tin-halide perovskite materials with excellent fluorescence properties, laying a foundation for replacing toxic lead halide perovskite materials.