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Modifier, perovskite active material, preparation method and perovskite solar cell

A technology of active materials and modifiers, applied in circuits, electrical components, photovoltaic power generation, etc., can solve problems that affect the commercial application of device performance, material performance degradation, degradation, etc., to improve photoelectric response performance, improve performance, and reduce impact degree of effect

Pending Publication Date: 2020-08-25
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, perovskite thin films are susceptible to external light, heat, water and oxygen, resulting in material performance degradation or even degradation, which seriously affects device performance and its commercial applications.

Method used

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  • Modifier, perovskite active material, preparation method and perovskite solar cell
  • Modifier, perovskite active material, preparation method and perovskite solar cell
  • Modifier, perovskite active material, preparation method and perovskite solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a perovskite solar cell and a preparation method thereof. Its preparation method comprises the following steps:

[0036] (1) Under anhydrous environment (relative humidity is less than the environment of 30wt%), lead iodide (PbI 2 ) and methyl iodide (MAI) were dissolved in a mixed solvent of dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) to obtain a perovskite precursor solution with a molar concentration of 2M; wherein, iodide The molar ratio of lead and methyl iodide is 1:1.10; the volume ratio of dimethylformamide and dimethyl sulfoxide is 4:1;

[0037] (2) Under anhydrous environment (or the environment with relative humidity less than 30wt%), the fullerene derivative-[6,6]-phenyl-C 61 -Methyl butyrate, polymethyl methacrylate and trioctyl ammonium trifluoromethanesulfonate were added to chlorobenzene in sequence and fully dissolved, then filtered with a 0.45 μm filter head to obtain a modifier containing multiple organic molecules...

Embodiment 2

[0044] This embodiment provides a perovskite solar cell and a preparation method thereof. Its preparation method is the same as Example 1, the difference is: in step (2), the fullerene derivative is [6,6]-phenyl-C 71 - methyl butyrate, the concentration of fullerene derivative is 1.0 mg / ml, the concentration of polymethyl methacrylate is 0.5 mg / ml, the concentration of trioctyl ammonium trifluoromethanesulfonate is 1.5 mg / ml ml; the rotation speed of spin coating in step (4) is 2000 rpm; the atmosphere in step (5) is DMF atmosphere, the annealing temperature is 110° C., and the time is 40 min.

Embodiment 3

[0046] This embodiment provides a perovskite solar cell and a preparation method thereof. Its preparation method is the same as Example 1, and the difference is: in step (3), the modifier containing multiple organic molecules configured in step (2) is used to replace the anti-solvent (chlorobenzene); after omitting step (4), all the other steps and Example 1 is the same.

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Abstract

The invention discloses a modifier, a perovskite active material, a preparation method and a perovskite solar cell. The modifier comprises a fullerene derivative, polymethyl methacrylate and an organic ionic liquid, halide perovskite is modified through cooperation of the fullerene derivative, polymethyl methacrylate and the organic ionic liquid, the photoelectric response characteristic and environmental stability of the halide perovskite are improved, and finally the performance of the perovskite solar cell is improved. According to the preparation method, halide perovskite is contacted witha multi-element organic molecule modifier, annealing treatment is carried out, and the perovskite thin film material with excellent photoelectric properties is prepared. The technical process is simple, the repeatability is high, the multi-element organic molecular components can be optimized according to actual application requirements, the photoelectric property of the halide perovskite thin film is exerted to the maximum extent, and excellent device performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of perovskite material preparation, and in particular relates to a modifier, a perovskite active material, a preparation method and a perovskite solar cell. Background technique [0002] Since the first report of perovskite solar cells, its cell efficiency has rapidly increased from the initial 3.8% to 25%. The improvement of efficiency is due to the improvement of the perovskite thin film preparation process, among which the emergence of the anti-solvent method (Anti-solvent method) has greatly improved the quality of the thin film and provided a guarantee for the preparation of high-efficiency batteries. At the same time, the study found that the chemical properties of thin film grain boundaries and their defects have an important impact on the generation, collection and transport of carriers. In addition, perovskite thin films are susceptible to external light, heat, water and oxygen, resulting in perfor...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48H01L51/46
CPCH10K71/15H10K71/12H10K85/215H10K30/20Y02E10/549
Inventor 向昱任屈军乐宋军彭晓于德良
Owner SHENZHEN UNIV