Continuous preparation method of uniform perovskite film on suede surface by liquid film quick-coating air knife quick-drying method to inhibit climbing and in-situ crystallization

Abstract

The invention discloses a liquid film rapid coating air knife quick-drying method for inhibiting creep and in-situ crystallization continuous preparation method of a uniform perovskite film on a suede surface. The method includes: first step, uniform coating of perovskite liquid film; second The first step is the rapid drying of the profiled perovskite liquid film: the drying of the profiled perovskite liquid film is completed by using 5 to 20 airflow channels of the multi-flow air knife; the third step is the hot gas annealing treatment of the perovskite liquid film: Using multi-flow air knife with 30 to 50 gas flow channels, the perovskite film is heat-treated with gas at a temperature of 80 to 160°C for 10 to 30 minutes to remove residual solvent and make the crystal grains grow, and obtain a pyramid-like fleece with full coverage Uniform perovskite thin films. Under the condition that the silicon pyramid textured surface is not polished and flattened, the present invention adopts the solution deposition method to realize the preparation of a fully covered and uniform profiled perovskite film on the micron-scale undulating pyramid textured substrate, maintaining the silicon solar cell The advantage of high efficiency.

Description

technical field [0001] The invention belongs to the technical field of silicon-perovskite laminated solar cell preparation, and in particular relates to a method for preparing a perovskite film. Background technique [0002] The structure of perovskite materials is generally ABX 3 (A is an organic cation, such as CH 3 NH 3 ,CH(NH 2 ) 2 etc.; B is a metal cation, such as Pb, Sn, etc.; X is F, Cl, Br, I). As of November 2018, the highest efficiency of certified single-junction perovskite solar cells has reached 23.4%. Higher photoelectric conversion efficiency is always one of the core goals in the development of photovoltaic cell technology. However, the photoelectric conversion efficiency of single-junction perovskite solar cells cannot exceed the theoretical efficiency of the Shockley-Queisser limit. Multi-junction solar cells, that is, stacked cells composed of solar sub-cells with different band gaps, are a mature and effective way to break through the theoretical ...

AI Technical Summary

Problems solved by technology

However, compared with silicon cells with pyramid textured light-trapping structures, the photoelectric conversion efficiency of silicon solar cells after polishing decreases to about 50% of the original value

Therefore, there are following deficiencies in this technical solution: first, the photoelectric conversion efficiency of silicon solar cells is greatly reduced by polishing and smoothing the silicon pyramid textured surface; Production cost, increased process and time, reduced production efficiency