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A method to improve the stability of perovskite solar cells
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A solar cell and perovskite technology, applied in the field of solar energy, achieves the effect of improving stability and achieving stability
Active Publication Date: 2021-08-27
SUZHOU UNIV
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[0003] The purpose of the present invention is to solve the defects existing in the existing perovskite mineralization technology, and to provide a method for battery preparation that has low requirements on the process environment, convenient preparation method, and can be kept for a long time in ordinary environments. A method for improving the stability of perovskite with stable properties
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Embodiment 1
[0024] The perovskite precursor solution for improving the stability of perovskite solar cells is composed of: bromomethylamine 14.1 mg, iodoformamidine 155.4 mg, lead iodide 554.3 mg, cesium iodide 47 mg, 3,4 -Dichloroaniline is 7.86 mg (ie 1.02%), 200mL dimethyl sulfoxide, 800mL N,N-dimethylformamide.
[0027] (2) Weigh formamidine iodide and cesium iodide, add them to the stirred solution in step (1), stir for 10 minutes, then add methyl bromide to the solution, raise the temperature of the solution to 50°C, and stir for 10 minutes ;
[0028] (3) Add lead iodide to the solution prepared in step (2), then add 3,4-dichloroaniline into the solution and stir until dissolved; keep the solution at a constant temperature of 50°C during the entire adding and stirring process;
[0029] (4) Continue stirring the solution prepared in step (3) ...
Embodiment 2
[0035] The light-absorbing layer of the solar cell is prepared by spin-coating the perovskite precursor solution for improving the stability of the perovskite solar cell in Example 1 on the substrate, and thermally annealing at 150° C. for 30 minutes to obtain the light-absorbing layer of the solar cell. crystal morphology see figure 1 ; Spin coating is two steps, first spin coating at 1000 rpm for 10 seconds, then spin coating at 6000 rpm for 30 seconds, and add 200 microliters of ether dropwise 15 seconds before the end of spin coating on a rotating perovskite film.
[0036] The substrate is coated with TiO 2 FTO glass or with SnO 2 ITO glass; the above operations were carried out in a glove box with water and oxygen content below 2PPM.
Embodiment 3
[0038] A perovskite solar cell comprises a conventional substrate, an electrontransport layer, a hole transport layer, an electrode and a perovskite layer, and the perovskite layer is composed of the perovskite precursor for improving the stability of the perovskite solar cell of embodiment one Solution preparation.
[0039] The preparation method of above-mentioned solar cell is as follows:
[0040] The perovskite precursor solution for improving the stability of perovskite solar cells in Example 1 is spin-coated on the substrate, and thermally annealed at 150°C for 30 minutes to obtain the light-absorbing layer of the solar cell. Spin-coating is two steps, first at 1000 rpm Spin coating at a speed of 6000 rpm for 10 seconds, then spin coating at a speed of 6000 rpm for 30 seconds, add ether dropwise before the end of spin coating; then prepare a hole transport layer on the light-absorbing layer, and then place the prepared device in a high vacuum In the electrode evaporati...
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Abstract
The invention discloses a method for improving the stability of a perovskitesolar cell. Formamidine iodide and cesium iodide are added to a solvent, methyl bromide is added after stirring, lead iodide and 3,4-dichloroaniline are added after stirring , stirring to obtain a perovskite precursor solution for improving the stability of the perovskitesolar cell; spin coating the perovskite precursor solution for improving the stability of the perovskite solar cell on the substrate, and thermal annealing to obtain a light-absorbing layer of the solar cell. The present invention replaces the existing perovskite layer, and the prepared solar cell solves the defects existing in the existing perovskite mineralization technology, and provides a method for the battery preparation process that has low requirements on the process environment, convenient preparation method, and can be realized in It is a means of improving the stability of perovskite that maintains stable properties for a long time in ordinary environments.
Description
technical field [0001] The invention belongs to solar energy technology, and in particular relates to a treatment method for improving the stability of perovskite solar cells. Background technique [0002] As a stable energy supplier in clean energy, solar energy has become a research hotspot pursued by global scientific research and high-tech enterprises. In today's solar cell application market, silicon solar cells occupy a large share. Although after a long period of exploration and development, solar cells with silicon crystals as the core have good and stable photoelectric conversion efficiency, The process, maintenance and recycling costs are high, the preparation environment is strict, the recycling efficiency is low, and the recycling cost is high. A new generation of photoelectric conversion materials is also emerging. Among them, based on ABX 3 Structure (A represents cation methylamine, formamidine, metal cesium, etc., B represents metal cation lead, tin, bismut...
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