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Flexible perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of poor stability of the light-absorbing layer, low flexibility of organic-inorganic hybrid perovskite, and low electron mobility, so as to reduce preparation costs and improve photoelectric conversion Efficiency and stability, and the effect of expanding the absorption spectrum

Inactive Publication Date: 2017-08-29
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the technical defects of the existing flexible perovskite solar cells, such as the low electron mobility and low flexibility of the electron transport layer and the poor stability of the organic-inorganic hybrid perovskite light-absorbing layer, and provide a A flexible perovskite solar cell and a preparation method thereof. The obtained flexible perovskite solar cell uses black phosphorus as an electron transport layer and black phosphorus / inorganic perovskite composite as a light-absorbing layer. The flexible solar cell prepared by this method has the following characteristics: Higher electron transport properties, flexibility and stability

Method used

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  • Flexible perovskite solar cell and preparation method thereof

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Embodiment 1

[0103] This embodiment includes the following steps:

[0104] (1) Spin-coat the black phosphorus dispersion on a transparent and flexible conductive substrate to form a black phosphorus electron transport layer, and bake it at 100°C for 5 minutes to form a black phosphorus electron transport layer;

[0105] The flexible conductive substrate is a thin film layer formed by polyethylene terephthalate (PET) with a pre-set circuit;

[0106] The spin coating speed is controlled at 3000rpm, and the spin time is controlled at 50s;

[0107] The solvent of described black phosphorus dispersion liquid is dehydrated alcohol;

[0108] The solid-to-liquid ratio of the black phosphorus dispersion (i.e. the mass ratio of black phosphorus to solvent)=1:4;

[0109] The number of black phosphorus layers in the black phosphorus electron transport layer is 7, and the film thickness of the electron transport layer is 350nm.

[0110] (2) Black phosphorus / CsPbBr 3 The composite dispersion was for...

Embodiment 2

[0122] This embodiment includes the following steps:

[0123] (1) Spin-coat the black phosphorus dispersion on a transparent and flexible conductive substrate to form a black phosphorus electron transport layer, and bake it at 100°C for 5 minutes to form a black phosphorus electron transport layer;

[0124] The flexible conductive substrate is a thin film layer formed by polyethylene terephthalate (PET) with a pre-set circuit;

[0125] The spin coating speed is controlled at 4500rpm, and the spin time is controlled at 60s;

[0126] The solvent of described black phosphorus dispersion liquid is dehydrated alcohol;

[0127] The solid-to-liquid ratio of the black phosphorus dispersion (i.e. the mass ratio of black phosphorus to solvent)=2:5;

[0128] The number of black phosphorus layers in the black phosphorus electron transport layer is 8, and the film thickness of the electron transport layer is 400nm.

[0129] (2) Black phosphorus / CsSnBr 3The composite dispersion was form...

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Abstract

The invention provides a flexible perovskite solar cell and a preparation method thereof. A structure of the flexible perovskite solar cell provided by the invention comprises an electron-transporting layer, a compounded light absorption layer, a hole-transporting layer and a counter electrode in sequence on a flexible substrate; the electron-transporting layer is black phosphorus; and the light absorption layer is a black phosphorus / inorganic perovskite structure compounded light absorption layer. The invention further provides the preparation method of the solar cell. In the flexible perovskite solar cell and the preparation method thereof provided by the invention, compared with a metal oxide semiconductor taken as the electron-transporting layer, the electron-transporting layer composed of the black phosphorus can be thermally treated under the condition of a lower temperature (less than 150 DEG C), and simultaneously has more excellent electron transport performance and is suitable for being applied to a flexible device; and in addition, by adopting the black phosphorus / inorganic perovskite structure compounded light absorption layer, the absorption spectrum of the solar cell can be expanded to a visible-infrared band, and the photoelectric conversion efficiency and the stability of the perovskite solar cell are improved.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a flexible perovskite solar cell with black phosphorus as an electron transport layer and a black phosphorus / inorganic perovskite composite as a light-absorbing layer and a preparation method thereof. Background technique [0002] Perovskite solar cells are a new type of high-efficiency solar cells that have developed rapidly in recent years. After only a few years, their photoelectric conversion efficiency has increased from 3.8% in 2009 to 22.1%. The structure of a traditional perovskite solar cell includes: a transparent conductive substrate, an electron transport layer, a perovskite light-absorbing layer, a hole transport layer, and a counter electrode. Among them, the most commonly used electron transport layer is a metal oxide semiconductor, and its main function is to collect and transmit the photogenerated electrons generated by the light-absorbing layer, and transmit them to t...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K30/15H10K2102/00Y02E10/549
Inventor 杨英郭学益高菁潘德群黄浩喻学锋
Owner CENT SOUTH UNIV
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