Method for synthesizing organic-inorganic hybrid perovskite monocrystals

Abstract

The invention discloses a method for synthesizing organic-inorganic hybrid perovskite monocrystals. The method comprises the steps: 1) dissolving lead bromide in hydrobromic acid, preparing a hydrobromic acid solution of lead bromide with the mass-volume ratio of 0.01 g / mL, and recording the solution as a solution A; 2) adding N,N-dimethyl ethylenediamine to the solution A to obtain a solution B,wherein the molar ratio of lead bromide to N,N-dimethyl ethylenediamine is 1:1; and sealing a container mouth with a thin film, and carrying out ultrasonic treatment for 8-10 min; 3) carrying out assisted crystallization with acetone: connecting a constant pressure funnel loaded with acetone with a container containing the solution B, closing a cock of the constant pressure funnel, standing for 2-3 d, and removing the liquid to obtain monocrystals; and 4) washing the obtained crystals with acetone, carrying out vacuum drying, and thus obtaining the perovskite monocrystals. The solid light-emitting monocrystals can be synthesized by trace reaction raw materials and can be implemented in general laboratories, and a green, low-cost and highly operable method is provided for volatile solvent diffusion-assisted monocrystal growth.

Description

technical field [0001] The invention relates to the technical field of solid luminescent nanometer materials, in particular to a method for synthesizing an organic-inorganic perovskite single crystal. Background technique [0002] Organic-inorganic hybrid perovskite materials, since they were used in solar cells in 2009, have attracted extensive attention from researchers due to their excellent photoelectric properties, low cost, simple preparation process, and continuously adjustable energy bands. . Especially in the field of solar cells, perovskite materials have made great progress in the field of optoelectronic devices due to their excellent absorption characteristics, low defect state density, and excellent carrier diffusion distance. Especially for photovoltaics, the efficiency of the cells has reached a certified 22.7% from 3.8%, comparable to commercial crystalline silicon solar cells. However, there are some factors in the synthesis of perovskite materials that li...

AI Technical Summary

Problems solved by technology

However, there are some factors in the synthesis of perovskite materials that limit its promotion and application, such as expensive raw materials and harsh synthesis conditions (need to be operated in a glove box or other specific reaction devices). In this case, it is necessary to find cheap raw materials and simple reactions. Devices and pre-experiments are also very important to promote the scale-up production and application of this material

Images