Manufacturing method of perovskite film and solar cell

Abstract

The application discloses a manufacturing method of a perovskite film. The method comprises the following steps: s1, forming a first film layer on a first substrate, wherein the material of the first film layer is selected from one or a mixture of a plurality of lead halide and tin halide; s2, forming a second film layer on a second substrate, wherein the material of the second film layer is selected from one or the mixture of the plurality of methylamine halide, ethylamine halide and formamidine halide; s3, oppositely laminating the first film layer and the second film layer, heating to obtain the perovskite film. The application further discloses a manufacturing method of a solar cell. Through the adoption of the dual-layer thermal diffusion technology and the principle that the methylamine halide, the ethylamine halide and the formamidine halide are diffused to the lead halide and tin halide under the heat effect to generate the perovskite, the perovskite film layer in high quality is prepared, the obtained film layer is smooth in surface, less in porosity and high in density. Furthermore, the reaction rate is improved, the reaction time is reduced, and the production rate is improved.

Description

technical field [0001] The application belongs to the field of solar cells, and in particular relates to a simple, convenient and rapid method for preparing high-quality perovskite thin films, which can be used for large-scale production of perovskite solar cells. Background technique [0002] As an inexhaustible and inexhaustible renewable green energy source, solar energy has become a research hotspot in the scientific circles of various countries. Among them, solar cells that convert solar energy into electrical energy have become one of the most popular research topics in the world today. Perovskite solar cells are a promising new type of solar cells that have emerged in recent years. In 2009, Miyasaka et al. used mesoporous titanium dioxide (TiO 2 ) as a photoanode, with perovskite (CH 3 NH 3 wxya 3 , X=I, Br) as a light absorbing layer, a solar cell was prepared with an efficiency of 3.81%, but at that time, a liquid electrolyte was used, and the perovskite surviv...

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Problems solved by technology

In 2009, Miyasaka et al. used mesoporous titanium dioxide (TiO 2 ) as a photoanode, with perovskite (CH 3 NH 3 wxya 3 , X=I, Br) as a light absorbing layer, a solar cell was prepared with an efficiency of 3.81%, but a liquid electrolyte was used at that time, and the perovskite survived in the liquid electrolyte for a short time

Although high-quality perovskite films can be prepared, evaporation requires high vacuum and high temperature, which consumes a lot of energy, which is not conducive to large-scale commercial production

Recently, a perovskite solar cell was prepared by spin-coating in two steps. First, a layer of lead iodide was spin-coated, and then a layer of methylamine iodine was spin-coated on the lead iodide layer, and the perovskite film was obtained by heating reaction. This method needs to control the amount of lead iodide and methylamine iodine to 1:1 in the preparation process, and because the reaction between the two substances is very fast, the preparation process of the entire reaction is difficult to control

Moreover, this method also requires that the solvents of lead iodide and methylammonium iodide be orthogonal solvents, which limits the wide application of this method.

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