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Method and device for preparation perovskite layer and application of perovskite layer

A technology of perovskite and absorbing layer, applied in the field of preparation of perovskite layer, can solve the problems of reducing carrier collection efficiency and photoelectric conversion efficiency, incomplete reaction of perovskite layer, unfavorable industrial application, etc. Conversion efficiency, grain boundary reduction, and effect of grain boundary recombination reduction

Pending Publication Date: 2019-06-18
上海祖强能源有限公司
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Problems solved by technology

[0003] At present, the methods for preparing perovskite layers for perovskite solar cells mainly include spin coating, spray pyrolysis, and evaporation methods. Among them, the spin coating method has high production costs and is not conducive to industrial application; Compared with the evaporation method, the uniformity and thickness of the film can be well controlled, and the production cost has obvious advantages, which has become one of the key research contents.
[0004] In the Chinese patent literature, CN106229411A, a perovskite solar cell with a backlight substrate is disclosed, wherein the perovskite layer is prepared by vacuum evaporation or spin coating; when the vacuum evaporation method is used to prepare the perovskite layer, first Thermal evaporation of lead iodide (PbI) under vacuum 2 ) powder, followed by thermal evaporation of CH 3 NH 3 I powder, take out deposited PbI 2 and CH 3 NH 3 After the substrate of I, carry out annealing to form perovskite absorption layer on heating plate; When adopting this method to prepare perovskite layer, deposit PbI on the substrate earlier 2 powder, followed by deposition of CH 3 NH 3 I powder and PbI 2 A chemical reaction occurs, resulting in not being combined with CH 3 NH 3 I Powder Contact PbI 2 There will be no reaction, so that the perovskite layer will not react completely and there will be PbI 2 The problem of powder residue; and the cross-sectional direction of the prepared perovskite film has a grain boundary crossing from the bottom to the top, and the roughness is relatively large, so that there are interface defects between the perovskite layer and the electron transport layer, reducing the load. Flow carrier collection efficiency and photoelectric conversion efficiency

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  • Method and device for preparation perovskite layer and application of perovskite layer

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Embodiment 1

[0045] The present embodiment provides a kind of preparation method of perovskite solar cell, specifically as follows:

[0046] Using the spray pyrolysis process, dissolve the precursor solution of titanium dioxide with a volume ratio of 1:25 in ethanol, spray it on the conductive glass FTO layer, spray 16 times, and sinter at 450°C for 30 minutes to obtain TiO 2 Electron transport layer;

[0047] By vacuum evaporation, the PbI 2 Powder, methyl ammonium iodide, methyl ether ammonium bromide, methyl ammonium chloride, and methyl ether ammonium iodide were vapor deposited on the electron transport layer to prepare the perovskite absorbing layer, wherein, PbI 2 Powder, methyl ammonium iodide, methyl ether ammonium bromide, methyl ammonium chloride, methyl ether ammonium iodide molar ratio is 0.8:0.7:0.1:0.1:0.1, evaporation rate is 0.8°A / s, 0.7° A / s, 0.1°A / s, 0.1°A / s, 0.1°A / s, put them into the crucible respectively, then put the crucible into the evaporation source, control th...

Embodiment 2

[0052] The present embodiment provides a kind of preparation method of perovskite solar cell, specifically as follows:

[0053] Using the spray pyrolysis process, dissolve the precursor solution of titanium dioxide with a volume ratio of 1:20 in ethanol, spray it on the glass conductive layer FTO, spray 13 times, and sinter at 400°C for 40 minutes to obtain TiO 2 Electron transport layer;

[0054] By vacuum evaporation, the PbI 2 Powder, methyl ammonium iodide, methyl ether ammonium bromide, methyl ammonium chloride, and methyl ether ammonium iodide were vapor deposited on the electron transport layer to prepare the perovskite absorbing layer, wherein, PbI 2 The molar ratio of powder, methyl ammonium iodide, methyl ether ammonium bromide, methyl ammonium chloride, and methyl ether ammonium iodide is 1:0.8:0.1:0.05:0.05, and the evaporation rates are 1°A / s and 0.8° respectively A / s, 0.1°A / s, 0.05°A / s, 0.05°A / s, put them into the crucible respectively, then put the crucible in...

Embodiment 3

[0059] The present embodiment provides a kind of preparation method of perovskite solar cell, specifically as follows:

[0060] Using the spray pyrolysis process, dissolve the precursor solution of titanium dioxide with a volume ratio of 1:25 in ethanol, spray it on the FTO layer of conductive glass, spray it 13 times, and sinter at 460°C for 40 minutes to obtain TiO 2 Electron transport layer;

[0061] By vacuum evaporation, the PbI 2 Powder, methyl ammonium iodide, methyl ether ammonium bromide, methyl ammonium chloride, and methyl ether ammonium iodide were vapor deposited on the electron transport layer to prepare the perovskite absorbing layer, wherein, PbI 2 The molar ratio of powder, methyl ammonium iodide, methyl ether ammonium bromide, methyl ammonium chloride, and methyl ether ammonium iodide is 1.5:0.5:0.1:0.1:0.3, and the evaporation rates are 1.5°A / s and 0.5° respectively A / s, 0.1°A / s, 0.1°A / s, 0.3°A / s, put them into the crucible respectively, then put the cruci...

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Abstract

The invention belongs to the technical field of solar battery preparing, and specifically relates to a method and device for preparation a perovskite layer and application of the perovskite layer. Themethod includes the steps that raw materials are deposited on a substrate to form the perovskite layer by adopting a vacuum evaporation way, during depositing, the depositing temperature is controlled to be 100 to 300 DEG C, and a quasi-monocrystal perovskite film is obtained; when the perovskite layer is prepared, the temperature during depositing is controlled to improve the crystal particle size of a perovskite layer film to the micron level, a corresponding crystal boundary is reduced, the longitudinal transferring speed of a carrier in the perovskite film is accelerated, recombination ofthe carrier at the crystal boundary is reduced, the collecting efficiency of the carrier is improved, and thus the photoelectric conversion efficiency is improved. In addition, an evaporator source of PbI2 and organic halides are opened at the same time, thus the evaporator source is deposited on the substrate to form the perovskite layer, and the PbI2 can react with methyl iodide amine, methyl ether bromide amine, methyl amine chloride and methyl ether iodide amine more fully and evenly.

Description

technical field [0001] The invention belongs to the technical field of solar cell preparation, and in particular relates to a preparation method, application and device of a perovskite layer. Background technique [0002] Since the perovskite solar cell was first reported in 2009, it has attracted the interest of a large number of scientific researchers. After several years of development, its photoelectric efficiency has increased from 3.8% to 22.1%, becoming the fastest growing and most concerned in the photovoltaic field. one of the research directions. Commonly used perovskite solar cell structures include conductive glass, electron transport layer, perovskite layer, hole transport layer, and metal electrodes, among which the perovskite layer plays a crucial role in the performance of the cell. [0003] At present, the methods for preparing perovskite layers for perovskite solar cells mainly include spin coating, spray pyrolysis, and evaporation methods. Among them, the...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/48H01L51/00C23C14/24
CPCY02E10/549
Inventor 李梦洁
Owner 上海祖强能源有限公司
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