Liquid film quick-coating air knife quick-drying creep suppression in-situ crystallization continuous preparation method for textured uniform perovskite film

Abstract

The invention discloses a liquid film quick-coating air knife quick-drying creep suppression in-situ crystallization continuous preparation method for a textured uniform perovskite film, comprising afirst step of uniform coating of a perovskite liquid film; a second step of rapid drying of the profiling perovskite liquid film: drying the profiling perovskite liquid film by using 5 to 20 airflow channels of a multi-flow air knife; a third step of hot gas annealing treatment of the perovskite liquid film: performing a heat treatment on the perovskite film for 10 to 30 minutes by using a gas having a temperature of 80 to 160 degrees centigrade and by using 30 to 50 airflow channels of the multi-flow air knife to remove a residual solvent and growing the grains, and obtaining a full-covered pyramid-like textured uniform perovskite film. The method realizes the preparation of the full-covered uniform profiling perovskite film on the pyramid textured substrate having micrometer scale protrusions by a solution deposition method under the condition that the silicon pyramid textured is not polished and smoothed, and maintains the high efficiency of a silicon solar cell.

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