A kind of polyhedral perovskite micron material and preparation method thereof

Abstract

The invention belongs to the technical field of semiconductor micron materials, in particular to a polyhedral perovskite micron material and a preparation method thereof. The invention utilizes the reaction of methylamine halide and lead halide to prepare perovskite, controls the reaction rate by adjusting the concentration of the reactant, and then regulates the growth rate of different crystal planes, and prepares perovskite materials with different crystal planes exposed, and the appearance is as follows: Polyhedral single crystal with micron size. The polyhedral single-crystal perovskite material has low surface roughness and regular shape, which can be used as a laser resonator with high optical quality, and the light emission spectrum of the crystal can be adjusted by exposure of different crystal faces, which is beneficial to its application in the fields of micro-nano light source and display. application. The synthesis method of the invention has the advantages of simple operation, low production cost, high yield, good quality of synthesized products, large-scale preparation, and is an efficient and economical novel preparation method.

Description

technical field [0001] The invention belongs to the technical field of semiconductor micro-materials, and particularly relates to a polyhedral perovskite micro-material and a preparation method thereof. Background technique [0002] Lead trihalide perovskite is a promising optoelectronic material due to its long carrier lifetime, long carrier diffusion length, and high carrier mobility. These superior properties make lead halide perovskite materials widely used in solar cells, light-emitting diodes, photodetectors, and lasers. For example, reference 1 (Zhu, H.; Fu, Y.; Meng, F.; et al. Lead halide perovskite nanowire lasers with lowlasing thresholds and high quality factors. Nature Materials 2015, 14 , 636.) First use of CH 3 NH 3 X 3 (X is Cl, Br, I) perovskite nanowire single crystal realizes laser emission. Reference 2 (Yang, W. S.; Park, B.-W.; Jung, E. H.; et al. Iodide management in formamidinium-lead-halide–based perovskite layers for efficient solar cells. Sc...

AI Technical Summary

Problems solved by technology

At present, CH with various regular morphologies 3 NH 3 x 3 (X is Cl, Br, I) The microstructure of perovskite has been preliminarily studied, although CH 3 NH 3 x 3 (X is Cl, Br, I) There are many methods for preparing perovskite micron materials, such as chemical vapor deposition, solution method, hydrothermal method, sol-gel method, etc., and perovskite with various morphologies can be prepared However, there are very few reports on the preparation methods of polyhedral perovskite micro-materials such as octahedral perovskite, and the preparation methods are complicated, with many processes and low yields.

Images