Method for improving stability of perovskite solar cell

A solar cell and perovskite technology, applied in the field of solar energy, to achieve the effect of improving stability

Active Publication Date: 2020-10-02
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 requir

Method used

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  • Method for improving stability of perovskite solar cell
  • Method for improving stability of perovskite solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Perovskite precursor solution for improving the stability of perovskite solar cells, the composition is: 14.1 mg of methyl bromide, 155.4 mg of iodoformamidine, 554.3 mg of lead iodide, 47 mg of cesium iodide, 3,4 - Dichloroaniline is 7.86 mg (ie 1.02%), 200 mL dimethyl sulfoxide, 800 mL N,N-dimethylformamide.

[0025] The preparation method is as follows:

[0026] (1) Add N,N-dimethylformamide to dimethyl sulfoxide, and stir the solution evenly;

[0027] (2) Weigh iodoformamidine and cesium iodide, add them to the stirred solution in step (1), stir for 10 minutes, then add bromide to the solution, raise the temperature of the solution to 50°C, and stir for 10 minutes ;

[0028] (3) adding lead iodide to the solution prepared in step (2), then adding 3,4-dichloroaniline to the solution and stirring until dissolved; maintaining the solution at a constant temperature of 50°C during the entire adding and stirring process;

[0029] (4) Continue stirring the solution prep...

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-step, first spin at 1000 r / s for 10 seconds, then spin at 6000 r / s for 30 seconds, and add 200 microliters of ether dropwise 15 seconds before the end of spin coating on a spinning perovskite film.

[0036] Substrate with TiO 2 FTO glass or with SnO 2 The above operations are carried out in a glove box and the water and oxygen content are all lower than 2PPM.

Embodiment 3

[0038] A perovskite solar cell includes a conventional substrate, an electron transport 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 in Example 1. Solution preparation.

[0039] The preparation method of the above-mentioned solar cell is as follows:

[0040] The perovskite precursor solution for improving the stability of the perovskite solar cell in Example 1 was 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 at a speed of 6000 rpm for 10 seconds, then spin coating at a speed of 6000 rpm for 30 seconds, and add diethyl ether dropwise before the end of the spin coating; then prepare a hole transport layer on the light absorbing layer, and place the prepared device in a high vacuum In the electrode evaporation apparatus, a silver electrod...

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Abstract

The invention discloses a method for improving the stability of a perovskite solar cell, and the method comprises the steps of adding ioformamidine and cesium iodide into a solvent, adding bromomethylamine after stirring, adding lead iodide and 3, 4-dichloroaniline after stirring, and obtaining a perovskite precursor solution for improving the stability of the perovskite solar cell through stirring; and spin-coating the perovskite precursor solution for improving the stability of the perovskite solar cell on a substrate, and performing thermal annealing to obtain a light absorption layer of the solar cell. According to the invention, an existing perovskite layer is replaced, the prepared solar cell solves the defects existing in the existing perovskite mineralization technology, and a perovskite stability improvement means which is used in the cell preparation process, has low requirements for the process environment, is convenient in preparation method, and can maintain the long-termcharacter stability in a common environment is provided.

Description

technical field [0001] The invention belongs to solar energy technology, and specifically relates to a processing method for improving the stability of a perovskite solar cell. Background technique [0002] As a stable energy donor in clean energy, solar energy has become a research hotspot that global scientific research and high-tech enterprises are chasing after. In today's solar cell application market, silicon crystalline solar cells occupy a large share. Although after a long period of exploration and development, solar cells with silicon crystal as the core have good and stable photoelectric conversion efficiency, but because of their own 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 born. Among them, based on ABX 3 Structural (A represents cation methylamine, formamidine, metal cesium, etc., ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K71/40H10K85/30H10K30/00Y02E10/549H10K85/50H10K30/50H10K71/15H01G9/0029H01G9/20
Inventor 唐建新李艳青陈力陈敬德
Owner SUZHOU UNIV
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