Perovskite light absorption layer thin film, preparation method thereof and solar cell using perovskite light absorption layer thin film

A solar cell and light-absorbing layer technology, applied in the field of solar cells, can solve the problems of lowering the preparation temperature of perovskite, poor stability, and not mentioned, and achieve the effects of shortening energy, reducing annealing temperature, and avoiding reactions

Pending Publication Date: 2020-04-24
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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Problems solved by technology

Described method specifically comprises the steps: hydrohalic acid HX, lead halide PbX 2 After mixing according to a certain ratio, it is coated on the substrate under an organic amine atmosphere, and then annealed to obtain a perovskite film; or hydrohalic acid HX, lead halide PbX 2 Mixed according to a certain ratio, coated on the substrate and dried to obtain a precursor film, and then treated with organic amine vapor through gas-solid in-situ reaction to prepare high-quality perovskite spin film; the perovskite film prepared by this method is crystallized Good properties, and the surface is dense and smooth, but it is not mentioned that the preparation temperature of perovskite can be reduced
[0006] CN108409582A discloses a method for preparing a perovskite film, comprising: step 1, mixing methylamine bromide and lead bromide to obtain a mixed solute; placing the mixed solute in a glove box, and adding a solvent therein to obtain a mixed solution , stir until the mixed solute is dissolved, filter to obtain the perovskite precursor solution; step 2, take the perovskite precursor solution, add phenylethylamine, and stir to obtain a mixed perovskite solution; step 3, take the mixed perovskite solution and spin Apply it on the substrate, and rotate the substrate to crystallize the mixed perovskite solution, and then heat and volatilize the solvent to obtain the perovskite film; the perovskite film prepared by this method has a higher coverage, but it is not mentioned that it can Reduce the temperature of perovskite preparation
[0007] CN107799655A discloses a kind of perovskite film, solar cell device and preparation method, the perovskite CH 3 NH 3 X Y 3 The precursor solution was spin-coated on the substrate, and then the CB-PCBM solution was added dropwise to continue the spin-coating for a certain period of time; finally, annealing was performed to obtain CH 3 NH 3 X Y 3 &PCBM perovskite thin film; wherein X is doped with one or more of the metal elements of Group IVA, and Y is doped with one or more of halogens; the solar cell prepared by this method has better Battery conversion efficiency, but its stability is poor

Method used

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Effect test

Embodiment 1

[0063] In this embodiment, a method for preparing a perovskite light-absorbing layer film is provided, the preparation method comprising the following steps:

[0064] (1) Dissolve the mixture of lead iodide and cesium iodide with a molar ratio of 1:1 in N,N-dimethylformamide to obtain CsPbI with a concentration of 0.5mol / L 3 solution, stirred at 50°C for 5h, then added with a concentration of 48% hydrobromic acid, and reacted at 50°C for 10h to obtain the perovskite precursor solution, wherein the concentration of hydrohalic acid in the perovskite precursor solution was 35 μL / mL;

[0065] (2) Spin-coat poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid solution on the surface of ITO glass at 4000rpm, and heat at 150°C in air for 10min to obtain poly(3,4-ethylenedioxythiophene) Dioxythiophene)-polystyrene sulfonic acid film, and then the perovskite precursor solution obtained in step (1) was spin-coated onto poly(3,4-ethylenedioxythiophene)-poly(3,4-ethylenedioxythiophe...

Embodiment 2

[0069] In this embodiment, a method for preparing a perovskite light-absorbing layer film is provided, the preparation method comprising the following steps:

[0070] (1) Dissolve the mixture of lead iodide and cesium iodide with a molar ratio of 1:1 in N,N-dimethylformamide to obtain CsPbI with a concentration of 0.5mol / L 3 solution, stirred at 60°C for 12h, then added hydrobromic acid with a concentration of 48%, and reacted at 60°C for 1h to obtain the perovskite precursor solution, wherein the concentration of hydrohalic acid in the perovskite precursor solution was 30 μL / mL;

[0071] (2) Spin-coat poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid solution on the surface of ITO glass at 3000rpm, and heat at 150°C in air for 10min to obtain poly(3,4-ethylenedioxythiophene) Dioxythiophene)-polystyrene sulfonic acid film, and then spin-coat the perovskite precursor solution obtained in step (1) onto poly(3,4-ethylenedioxythiophene)-poly(3,4-ethylenedioxythiophene)-po...

Embodiment 3

[0075] In this embodiment, a method for preparing a perovskite light-absorbing layer film is provided, the preparation method comprising the following steps:

[0076] (1) A mixture of lead iodide and cesium iodide with a molar ratio of 1:1 is dissolved in dimethyl sulfoxide to obtain CsPbI with a concentration of 0.5mol / L 3 solution, stirred at 25°C for 25h, then added hydriodic acid with a concentration of 48%, and reacted at 60°C for 1h to obtain the perovskite precursor solution, wherein the concentration of hydrohalic acid in the perovskite precursor solution was 30 μL / mL;

[0077] (2) Spin-coat poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid solution on the surface of ITO glass at 3000rpm, and heat at 150°C in air for 10min to obtain poly(3,4-ethylenedioxythiophene) Dioxythiophene)-polystyrene sulfonic acid film, and then spin-coat the perovskite precursor solution obtained in step (1) onto poly(3,4-ethylenedioxythiophene)-poly(3,4-ethylenedioxythiophene)-polys...

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Abstract

The invention provides a perovskite light absorption layer thin film, a preparation method thereof and a solar cell using the perovskite light absorption layer thin film. The preparation method comprises the steps of taking haloid acid as an additive, and preparing the perovskite light absorption layer thin film. According to the method for preparing the perovskite light absorption layer thin film, haloid acid is used as an additive, so that the annealing temperature in the preparation process of the perovskite light absorption layer thin film is greatly reduced; the preparation raw materialsare easy to obtain; the preparation process is simple; a large amount of organic solvents harmful to the environment are prevented from being used; operation under high-temperature and high-pressure or vacuum conditions is avoided; and the solar cell prepared from the perovskite light absorption layer thin film has relatively good energy conversion efficiency.

Description

technical field [0001] The invention belongs to the field of solar cells, and relates to a perovskite light-absorbing layer film, a preparation method thereof and a solar cell using the same. Background technique [0002] With the development of science and technology, people's demand for energy is increasing day by day, but the traditional fossil energy is limited and cannot provide stable energy security for social development. At the same time, the use of traditional fossil energy will cause a certain degree of environmental pollution. Finding new types of green and renewable energy is a key problem to be solved urgently for mankind. Solar energy is huge, inexhaustible, and environmentally friendly, without geographical restrictions and transportation, it is an ideal alternative energy source. In the research on the utilization of solar energy, solar cells that directly convert solar energy into electrical energy are the most active research fields. [0003] After year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/56
CPCH10K71/12H10K85/00H10K30/10H10K30/80Y02E10/549Y02P70/50
Inventor 丁黎明王诗哲
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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