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Electron transport layer for improving stability of reverse perovskite solar cell and preparation method

A technology of electron transport layer and solar cell, applied in the field of solar cell

Active Publication Date: 2019-11-05
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods to improve the stability of perovskite solar cells are mainly through encapsulation of hydrophobic materials for solar cells, but not from the aspect of improving the hydrophobicity of the electron transport layer or hole transport layer.

Method used

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  • Electron transport layer for improving stability of reverse perovskite solar cell and preparation method
  • Electron transport layer for improving stability of reverse perovskite solar cell and preparation method
  • Electron transport layer for improving stability of reverse perovskite solar cell and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of fluorine-containing fluorene monomer, 2,7-dibromo-9,9-bis(hexafluorobutyl propionate)fluorene:

[0046] After placing a magnetic stirrer in a 100mL three-necked flask equipped with a thermometer, add 3.3g (10.2mmol) 2,7-dibromofluorene, 0.25g (0.78mmol) tetrabutylammonium bromide and 25mL toluene in sequence, and vacuumize Nitrogen was blown to maintain the nitrogen atmosphere, and then 5 mL of 50% potassium hydroxide aqueous solution was slowly added dropwise with a syringe. After magnetic stirring for about 30 minutes, use an ice-water bath, and after the temperature of the reaction system is constant, add 9.676 g (41 mmol) of hexafluorobutyl acrylate dropwise with a syringe. After the hexafluorobutyl acrylate was added dropwise, the stirring was continued for about 1 hour, and the temperature was raised to 25° C. for 6 hours. After the reaction, the reaction solution was poured into a separatory funnel, diluted with an appropriate amount of toluene, w...

Embodiment 2

[0048] Preparation of fluorine-containing fluorene monomer, 2,7-dibromo-9,9-bis(dodecafluoroheptyl propionate)fluorene:

[0049] After placing a magnetic stirrer in a 100mL three-neck flask equipped with a thermometer, add 3.3g (10.2mmol) 2,7-dibromofluorene, 0.16g (0.78mmol) tetraethylammonium bromide and 25mL dichloroethane , evacuated and ventilated with nitrogen to maintain the nitrogen atmosphere, and then slowly added 5 mL of 50% sodium hydroxide aqueous solution dropwise with a syringe. After magnetic stirring for about 30 minutes, use an ice-water bath, and after the temperature of the reaction system is constant, add 15.832 g (41 mmol) of dodecafluoroheptyl acrylate dropwise with a syringe. After the dodecafluoroheptyl acrylate was added dropwise, stirring was continued for about 1 h, and the temperature was raised to 30° C. for 8 h. After the reaction, pour the reaction solution into a separatory funnel, add an appropriate amount of dichloroethane to dilute, wash an...

Embodiment 3

[0051] Preparation of fluorine-containing fluorene monomer, 2,7-dibromo-9,9-di(tridecafluorooctyl propionate) fluorene:

[0052] After placing a magnetic stirrer in a 100mL three-neck flask equipped with a thermometer, add 3.3g (10.2mmol) 2,7-dibromofluorene, 0.21g (0.78mmol) tetrapropylammonium bromide and 25mL chloroform in sequence, and vacuumize Nitrogen was blown to maintain the nitrogen atmosphere, and then 5 mL of 50% potassium hydroxide aqueous solution was slowly added dropwise with a syringe. After magnetic stirring for about 30 minutes, use an ice-water bath, and after the temperature of the reaction system is constant, add 17.138 g (41 mmol) of trifluorooctyl acrylate dropwise with a syringe. After the trifluorooctyl acrylate was added dropwise, the stirring was continued for about 1 h, and the temperature was raised to 30° C. for 10 h. After the reaction, the reaction solution was poured into a separatory funnel, diluted with an appropriate amount of chloroform, ...

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Abstract

The invention belongs to the technical field of solar cells, and particularly relates to an electron transport layer for improving the stability of a reverse perovskite solar cell and a preparation method of the electron transport layer. The preparation method comprises the following steps: synthesizing fluorine-containing polyfluorene by adopting Suzuki coupling reaction, dissolving the preparedfluorine-containing polyfluorene, fullerene and derivatives thereof in chlorobenzene to obtain a fluorine-containing polyfluorene, fullerene and derivative solution thereof, and then carrying out thespin-coating of the fluorine-containing polyfluorene, fullerene and derivative solution thereof on a perovskite layer of a solar cell device to obtain an electron transport layer. Compared with a common electron transport layer material, the electron transport layer provided by the invention can obviously improve the stability of the reverse perovskite solar cell.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to an electron transport layer and a preparation method for improving the stability of reverse perovskite solar cells. Background technique [0002] As a theoretically inexhaustible, green and non-polluting clean energy, solar energy is favored by people. Solar cells are important devices that convert solar energy into electrical energy. Among them, since the perovskite solar cell came out in 2009, after ten years of development, the efficiency has exceeded 23%, which has achieved good results that other types of cells do not have. However, the stability of perovskite solar cells, especially perovskite The moisture stability of the material has seriously hindered its commercialization. Therefore, it is of great significance to study and prepare materials that can effectively transport charges and resist water vapor erosion to promote the development of perovskite so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48C08G61/10
CPCC08G61/10C08G2261/411C08G2261/3142C08G2261/514C08G2261/1412C08G2261/146C08G2261/122H10K71/12H10K85/111H10K85/215H10K85/151H10K30/00Y02E10/549
Inventor 李坚贾正任强汪称意
Owner CHANGZHOU UNIV
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