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Perovskite solar battery and preparation method therefor

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of unfavorable formation of perovskite film layer with uniform quality, uneven distribution of electronic conductor materials, and poor carrier transport efficiency, so as to improve photoelectric conversion Efficiency, rich structure types, and the effect of improving the open circuit voltage

Inactive Publication Date: 2018-02-16
SICHUAN NEW MATERIAL RES CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Planar structure perovskite solar cells are simple in structure and easy to prepare, but there are big problems in stability, and at the same time, the photoelectric conversion performance is relatively low, and the transport efficiency of carriers is poor, which is the biggest obstacle to the development of low-temperature flexible high-efficiency solar cells.
[0005] In order to improve planar heterojunction cells, some people use bulk heterojunction structures, mainly by blending electronic conductor materials with perovskite, but the problem is that the distribution of electronic conductor materials in perovskite is not uniform, Conducive to the formation of uniform quality perovskite film layer

Method used

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  • Perovskite solar battery and preparation method therefor
  • Perovskite solar battery and preparation method therefor
  • Perovskite solar battery and preparation method therefor

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preparation example Construction

[0048] The perovskite solar cell provided by the invention is as figure 1 As shown, from bottom to top are conductive glass layer, electron transport layer, perovskite light-absorbing layer, hole transport layer and electrode layer, wherein the perovskite light-absorbing layer is a gradient heterojunction with perovskite-hole conductor structure of perovskite thin films, wherein the preparation method of the gradient heterojunction structure comprises the following steps: (1) providing a perovskite precursor layer, dissolving the hole conductor material in an anti-solvent to obtain a mixed solution, and containing the hole The anti-solvent of the hole conductor material is dropped on the surface of the perovskite precursor, and the hole conductor material will be deposited on the surface of the perovskite precursor and enter the shallow layer of the perovskite precursor to obtain a thin film of the perovskite precursor; The hole conductor material is any one of PTAA, P3HT, Spi...

Embodiment 1

[0059] The invention provides a perovskite solar cell, wherein the cell consists of FTO conductive glass layer, TiO 2 Electron transport layer, PTAA-perovskite thin film gradient heterojunction perovskite light absorbing layer, Spiro-OMeTAD hole transport layer and Au electrode layer.

[0060] Its preparation method is specifically:

[0061] (1) FTO conductive glass is provided, and TiO is prepared on the FTO conductive glass 2 Electron transport layer;

[0062] (2) In the TiO 2 Spin coating the perovskite precursor layer on the electron transport layer;

[0063] (3) The hole conductor material PTAA is dissolved in the anti-solvent toluene solution to obtain a mixed solution, and the time for adding the mixed solution to the perovskite precursor layer is 5 to 15 seconds from the end of the spin coating. The titanium precursor is deposited on the surface and enters into the shallow layer of the perovskite precursor to obtain the perovskite precursor thin film.

[0064] (4)...

Embodiment 2

[0071] The invention provides a kind of perovskite solar battery, and described battery is FTO conductive glass layer, SnO 2 Electron transport layer, PTAA-perovskite thin film gradient heterojunction perovskite light absorbing layer, PTAA hole transport layer and Au electrode layer.

[0072] Its preparation method is specifically:

[0073] (1) FTO conductive glass is provided, and SnO is spin-coated on the FTO conductive glass 2 Electron transport layer;

[0074] (2) In the SnO 2 Spin coating the perovskite precursor layer on the electron transport layer;

[0075] (3) The hole conductor material PTAA is dissolved in the anti-solvent chlorobenzene solution to obtain a mixed solution, and the time for adding the mixed solution dropwise to the perovskite precursor layer is 10s from the end of the spin coating, and the PTAA is deposited on the perovskite Deposit on the surface of the ore precursor and enter into the shallow layer of the perovskite precursor to obtain the pero...

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Abstract

The invention discloses a perovskite solar battery. The perovskite solar battery is characterized by comprising a conductive glass layer, an electron transport layer, a perovskite light absorbing layer, a hole transport layer and an electrode layer from the bottom up in sequence; and the shallow layer part of the perovskite light absorbing layer adopts a gradient heterojunction structure. By virtue of the gradient heterojunction structure formed by the perovskite shallow layer part and a hole conductor material, the hole transport distance can be shortened, the transport capability of currentcarriers can be improved, and the performance of the perovskite solar battery can be improved in an all-around manner.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a perovskite solar cell and a preparation method thereof. Background technique [0002] With the depletion of non-renewable coal, oil, natural gas and other fossil energy sources on the earth and the increasingly serious environmental problems caused by their extensive use, solar energy, as an inexhaustible renewable and clean energy, has been Extensive development and utilization. Among them, solar cells can directly convert solar energy into electrical energy, which is a very important way of utilizing solar energy. [0003] According to the different types of photoelectric active materials, solar cells can be mainly divided into single silicon solar cells, inorganic compound semiconductor solar cells and organic or organic-inorganic hybrid solar cells. Among them, organic-inorganic hybrid perovskite solar cells have the advantages of low material cost, simple preparation process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K30/00Y02E10/549
Inventor 张文华吴义辉王鹏张志群
Owner SICHUAN NEW MATERIAL RES CENT
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