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A preparation method of a perovskite solar cell with ternary mixed solvent

A mixed solvent and solar cell technology, applied in the field of solar photovoltaic, can solve the problems affecting the photoelectric conversion efficiency of battery devices, carrier recombination, small grain size, etc., and achieves improved photoelectric conversion efficiency, good surface flatness, and uniform thickness. Effect

Active Publication Date: 2019-01-11
SHAANXI NORMAL UNIV
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Problems solved by technology

[0002] In recent years, organic-inorganic hybrid perovskite solar cells have attracted widespread attention due to their excellent photoelectric performance, and the research on perovskite cells has continued to develop. Small, a large number of defects at the grain boundary will cause serious carrier recombination, affecting the photoelectric conversion efficiency of the battery device

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  • A preparation method of a perovskite solar cell with ternary mixed solvent
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  • A preparation method of a perovskite solar cell with ternary mixed solvent

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Embodiment 1

[0050] S1. Preparation of perovskite precursor solution: PbI with a mixing molar ratio of 1:0.95:0.05 2 、CH(NH 2 ) 2 I and CsI are as solute, and GBL, DMSO and DMF that mixing volume ratio is 1:1:0.86 are as solvent; It is 1.2mol / L that solute is dissolved in ternary mixed solvent according to concentration, obtains mixed solution; Mixed solution is in 60 Stir evenly at ℃, filter with a polytetrafluoroethylene filter membrane with a pore size of 0.45 μm to obtain a clear perovskite solution for later use, which is the perovskite precursor solution;

[0051] S2. Clean the FTO glass substrate: take 2.5×2.5cm 2 Fluorine-doped SnO 2 (FTO) transparent conductive glass, use acetone, isopropanol, ethanol and ultrapure water to ultrasonically clean, and the cleaning time of each type of cleaning solution is >20min; dry the cleaned glass substrate with a nitrogen gun, and place it in a container for use ;

[0052] S3, preparing TiO 2 Electron transport layer: Treat the above-ment...

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Abstract

The invention discloses a preparation method of a perovskite solar cell with ternary mixed solvent. In the preparation of perovskite photovoltaic solar cells, N, N-Dimethylformamide (DMF), Dimethyl Sulfoxide (DMSO), GAMMA-Butyrolactone (GBL) ternary mixed solvent is used to prepare perovskite precursor, Compared with the binary mixed solvents, the crystalline quality of the perovskite film is greatly improved. The perovskite absorbing layer prepared by the three solvents at this ratio enlarges the grain size, reduces the carrier recombination loss caused by the defects at the grain boundary, increases the carrier lifetime, and ultimately improves the photoelectric conversion efficiency of the perovskite solar cell device, and improves the series-parallel resistance of the device.

Description

【Technical field】 [0001] The invention belongs to the technical field of solar photovoltaics, in particular to a method for preparing a perovskite solar cell with a ternary mixed solvent. 【Background technique】 [0002] In recent years, organic-inorganic hybrid perovskite solar cells have attracted widespread attention due to their excellent photoelectric performance, and the research on perovskite cells has continued to develop. Small, a large number of defects at the grain boundary will cause serious carrier recombination, affecting the photoelectric conversion efficiency of the battery device. Therefore, there is a need for a preparation method that can prepare perovskite thin films with high quality and large grains to improve the efficiency of perovskite solar cells. 【Content of invention】 [0003] The object of the present invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of perovskite solar cell preparation method of ternary mixe...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K71/12H10K30/451H10K30/80H10K2102/00Y02E10/549
Inventor 赵奎牛天启陆静刘生忠
Owner SHAANXI NORMAL UNIV
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