Perovskite precursor solution for improving stability of perovskite solar cell

A perovskite precursor, solar cell 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 perovskite precursor solution for improving the stability of perovskite solar cells, which can maintain the properties for a long time in ordinary environments Stable perovskite stability improvement means

Method used

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  • Perovskite precursor solution for improving stability of perovskite solar cell
  • Perovskite precursor solution for improving stability of perovskite solar cell
  • Perovskite precursor solution for improving stability of perovskite solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 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.

[0031] The preparation method is as follows:

[0032] (1) Add N,N-dimethylformamide into dimethyl sulfoxide, and stir the solution evenly;

[0033](2) Weigh formamidine iodide and cesium iodide, add them to the solution stirred 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 ;

[0034] (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;

[0035] (4) Continue stirring the solution prepared in step (3) a...

Embodiment 2

[0041] 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.

[0042] 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

[0044] A perovskite solar cell comprises 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 of embodiment one Solution preparation.

[0045] The preparation method of above-mentioned solar cell is as follows:

[0046] 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 perovskite precursor solution 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 the perovskite precursor solution for improving the stability of the perovskite solar cell through stirring; spin coating the perovskite precursor solution for improving the stability of the perovskite solar cell on a substrate, and obtaining a perovskite thin film through thermalannealing as a light absorption layer of the solar cell. The perovskite precursor solution for improving the stability of the perovskite solar cell prepared by the invention replaces an existing perovskite layer, the defects in the existing perovskite mineralization technology are solved, and a perovskite stability improvement means that has low requirements for the process environment, is convenient in preparation method, can realize the long-time stable performance in a common environment and is used for the cell preparation process, is provided.

Description

technical field [0001] The invention belongs to solar energy technology, and in particular relates to a perovskite precursor solution for improving the stability of a perovskite solar cell. 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 lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K71/40H10K85/30H10K30/00Y02P70/50Y02E10/549H10K30/151H10K85/50H10K71/15
Inventor 唐建新李艳青陈力陈敬德
Owner SUZHOU UNIV
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