Method for manufacturing organic and inorganic perovskite crystal film

Abstract

The embodiments of the invention disclose a method for manufacturing an organic and inorganic perovskite crystal film. The method comprises: cleaning a flexible substrate; forming an organic and inorganic perovskite film on the flexible substrate; and annealing the organic and inorganic perovskite film in a steam atmosphere of N, N-dimethyl formamide (DMF) or dimethyl sulfoxide (DMSO). In the embodiments of the invention, in the solvothermal annealing process of the DMF or DMSO steam atmosphere, small crystal grains are continually reduced, while large crystal grains are continually grown, so that the average grain size of the organic and inorganic perovskite crystal film is continually increased, more crystal grains in the [220] direction can be obtained, the service life of current carriers can be prolonged, the growth of the crystal grains is accelerated, the crystal grains are larger, grain boundary recombination can be reduced, and the photoelectric conversion efficiency of an organic and inorganic perovskite solar cell can be improved.

Description

technical field [0001] The invention relates to the technical field of solar battery thin films, in particular to a method for manufacturing organic-inorganic perovskite crystal thin films. Background technique [0002] Organometal halide perovskite materials are a molecular-scale hybrid and a new type of material with a quantum well structure because they have some properties of organic and inorganic substances, so they have been widely used in many fields. Such as light-emitting diodes, field effect transistors, photovoltaic devices and other fields. Organometal halide perovskite thin films have high solar spectral absorption coefficient and carrier mobility. At the same time, the preparation methods of organometal halide perovskite thin films are simple and diverse, and the cost is low. The energy band structure can be obtained through inorganic components and The composition of organic units can be adjusted, so this new material has broad application prospects in the ...

AI Technical Summary

Problems solved by technology

But long-time high-temperature or low-temperature thermal annealing will decompose the perovskite film, thereby reducing the efficiency of solar cells

[0004] In recent years, foreign researchers have proposed the method of vapor phase co-deposition to obtain high-quality perovskite films, but this method requires high-vacuum and high-purity target materials

[0005] In summary, the quality of organic-inorganic perovskite films has become a bottleneck for the performance improvement of planar heterojunction solar cells.

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