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Perovskite solar cell introduced with organic ligand, and preparation method of perovskite solar cell

A technology of organic ligands and solar cells, applied in the field of solar photovoltaic, can solve the problems of reducing the photoelectric conversion efficiency of devices, reducing the absorption coefficient and carrier transport capacity of perovskite materials, and achieving the effect of facilitating temperature control.

Active Publication Date: 2019-06-21
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with three-dimensional perovskites, low-dimensional Ruddlesden-Popper (RP) layered perovskites have great potential in photovoltaic applications due to their excellent physical properties; however, because the introduction of organic ligands will reduce the perovskite The absorption coefficient of the material and the transport capacity of the carrier will reduce the photoelectric conversion efficiency of the corresponding device. Therefore, a preparation method is needed to prepare perovskite with high photoelectric conversion efficiency and excellent stability. mine solar cell

Method used

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  • Perovskite solar cell introduced with organic ligand, and preparation method of perovskite solar cell
  • Perovskite solar cell introduced with organic ligand, and preparation method of perovskite solar cell
  • Perovskite solar cell introduced with organic ligand, and preparation method of perovskite solar cell

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Embodiment 1

[0075] S1. Preparation of perovskite precursor solution: PbI with a mixing molar ratio of 1.2:0.9:0.6 2 , MAI and EAI are used as solutes, and DMSO and DMF with a mixing volume ratio of 7:3 are used as solvents; the solutes are dissolved in the mixed solvent at a concentration of 1.2mol / L to obtain a mixed solution; the mixed solution is stirred evenly at 60°C, The stirring speed is 600r / s, and the clarified perovskite solution is obtained by filtering with a polytetrafluoroethylene filter membrane with a pore size of 0.45 μm, which is the perovskite precursor solution;

[0076] 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 ;

[0077] S3, preparing TiO 2 Electron transport layer: ...

Embodiment 2

[0085] S1. Preparation of perovskite precursor solution: PbI with a mixing molar ratio of 1.2:0.9:0.6 2 , MAI and PAI as the solute, and DMSO and DMF with a mixing volume ratio of 7:3 as the solvent; the solute is dissolved in the mixed solvent at a concentration of 1.2mol / L to obtain a mixed solution; the mixed solution is stirred evenly at 60°C, The stirring speed is 600r / s, and the clarified perovskite solution is obtained by filtering with a polytetrafluoroethylene filter membrane with a pore size of 0.45 μm, which is the perovskite precursor solution;

[0086] S2, cleaning the FTO glass substrate: same as S2 in Example 1;

[0087] S3, preparing TiO 2 Electron transport layer: same as S3 in Example 1;

[0088] S4, preparation of perovskite absorbing layer: same as S4 in Example 1;

[0089] S5, preparation of Spiro-OMeTAD hole transport layer: same as S5 in Example 1;

[0090] S6, Au electrode evaporation: same as S6 in Example 1;

Embodiment 3

[0092] S1. Preparation of perovskite precursor solution: PbI with a mixing molar ratio of 1.2:0.9:0.6 2 , MAI and BAI as solute, mixed volume ratio is 7:3 DMSO and DMF as solvent; It is 1.2mol / L that solute is dissolved in mixed solvent according to concentration, obtains mixed solution; All the other steps are with S1 among the embodiment 2;

[0093] S2, cleaning the FTO glass substrate: same as S2 in Example 1;

[0094] S3, preparing TiO 2 Electron transport layer: same as S3 in Example 1;

[0095] S4, preparation of perovskite absorbing layer: same as S4 in Example 1

[0096] S5, preparation of Spiro-OMeTAD hole transport layer: same as S5 in Example 1

[0097] S6, Au electrode evaporation: the same as S6 in Example 1

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Abstract

The invention discloses a perovskite solar cell introduced with an organic ligand, and a preparation method of the perovskite solar cell. An absorption layer of the perovskite cell is introduced withthe organic ligand, so that a three-dimensional perovskite framework structure becomes a two-dimensional structure through dimensionality reduction, and a perovskite absorption layer structure with aninorganic perovskite layer and two organic ligand layers is formed; the electronic dimension is reduced, so that the band gap of the absorption layer is adjustable; and meanwhile, the crystallizationprocess can be regulated and controlled, namely, the final crystal particle size is controlled, so that the particle size of perovskite is increased, the environment stability of a thin film and a device is enhanced, the dynamic stability of crystals is also improved, and meanwhile, the environmental stability and the thermodynamics stability of the perovskite cell are improved; the structure cancontrol the physical property and the photovoltaic property of the perovskite, which are higher than those of other two-dimensional perovskite solar cells; an idea is provided for preparing the two-dimensional perovskite solar cell with stable performance; and the commercial process of the perovskite solar cell is promoted.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of solar photovoltaic technology, and in particular relates to a perovskite solar cell introduced with an organic ligand and a preparation method thereof. [0003] 【Background technique】 [0004] In recent years, organic-inorganic metal halide perovskites have become the most promising photovoltaic materials due to their excellent intrinsic properties, such as tunable direct bandgap, long exciton and charge diffusion lengths, and high light absorption coefficient. . At present, the certified maximum efficiency of perovskite solar cells has reached 23.7%. Compared with three-dimensional perovskites, low-dimensional Ruddlesden-Popper (RP) layered perovskites have great potential in photovoltaic applications due to their excellent physical properties; however, because the introduction of organic ligands will reduce the perovskite The absorption coefficient of the material and the transport capacity of the carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCY02E10/549Y02P70/50
Inventor 刘生忠赵奎成沛锐
Owner SHAANXI NORMAL UNIV
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