Method for growing ABX3 perovskite single crystal by antisolvent diffusion

Abstract

The invention discloses a method for growing an ABX3 perovskite single crystal by antisolvent diffusion. The method comprises the following steps: dissolving an A-containing halide and a B-containing metal compound in a solvent M, and adding a right amount of antisolvent N to obtain an approximately saturated single crystal growth solution, wherein the mole ratio of the A-containing halide to the B-containing metal compound is 1:(0.1-2); putting the open container P containing the approximately saturated single crystal growth solution into the closed container Q containing the antisolvent N; and at a certain temperature, carrying out seed crystal culture and seed crystal growth (two growth processes) to obtain the ABX3 perovskite single crystal with required size. According to the method for preparing the high-quality perovskite single crystal, the principle that the antisolvent diffuses to the single crystal growth solution is utilized to slowly lower the solubility of perovskite in the single crystal growth solution, so that the solution precipitates the perovskite single crystal. The method has the advantages of large size and high quality of the obtained single crystal, high utilization ratio of raw materials, simple facility request, simple technique, low environmental hazard and the like.

Description

technical field

[0001] The invention belongs to the technical field of perovskite single crystal preparation, in particular to an anti-solvent diffusion growth ABX 3 Methods for perovskite single crystals. Background technique

[0002] With the rapid development of human society, people's demand for energy is also increasing rapidly. The limited traditional fossil energy is consumed in large quantities and is increasingly exhausted, causing a series of problems such as environmental pollution and global warming, which has triggered people's urgent need for sustainable energy. need. The development of new energy sources provides an important guarantee for the sustainable development of human civilization. As a clean and inexhaustible energy source, solar energy can just solve the increasingly acute contradiction between the environment and energy. Currently, a perovskite-structured organic-inorganic hybrid material CH 3 NH 3 wxya 3 It is sparking a revolution in the fiel...

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