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A kind of high-efficiency planar perovskite solar cell and its preparation method

A solar cell and perovskite technology, applied in the field of solar cells, achieves the effects of easy realization, promotion of conduction and collection, and low preparation cost

Active Publication Date: 2020-10-09
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no planar CH with gallium-doped titania dense layer as the electron-conducting layer. 3 NH 3 PB 3-x Cl x Based on perovskite solar cells, there is no low-temperature preparation of gallium-doped titanium dioxide dense layer to assemble high-efficiency planar CH 3 NH 3 PB 3-x Cl x Related reports on perovskite-based solar cells

Method used

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  • A kind of high-efficiency planar perovskite solar cell and its preparation method

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preparation example Construction

[0027] The preparation method of the high-efficiency planar perovskite solar cell provided by the invention comprises the following steps:

[0028] (1) Preparation of the electron-conducting layer: First, gallium nitrate was added to the ice-water mixture, and then an aqueous solution of titanium tetrachloride was added to prepare a colloidal solution of gallium-doped titanium dioxide. Then take the clean transparent conductive substrate and soak it in gallium-doped titanium dioxide colloidal solution at 60-80°C for 40-60 minutes, rinse it with deionized water and ethanol in turn after taking it out, and then conduct heat treatment at 180-220°C for 30-60 Minutes, a dense layer of gallium-doped titanium dioxide as an electron-conducting layer prepared on a transparent conductive substrate is obtained.

[0029] (2) Preparation of the perovskite layer: CH with a molar ratio of 3:1 3 NH 3 I and PbCl 2Dissolve in dimethylformamide to obtain a perovskite precursor solution, perfo...

Embodiment 1

[0033] In this embodiment, the preparation of high-efficiency planar perovskite solar cells is carried out according to the following steps:

[0034] (1) Preparation of gallium-doped titanium dioxide dense layer: first add gallium nitrate to the ice-water mixture, then add titanium tetrachloride aqueous solution with a volume ratio of titanium tetrachloride and water of 1.5-4:100, and configure gallium-doped titanium dioxide. Colloidal solution of heterotitanium dioxide. Then take the clean fluorine-doped tin dioxide conductive glass and irradiate it with a UV lamp for 10-20 minutes, put it into gallium-doped titanium dioxide colloidal solution at 70°C and soak it for 50 minutes, take it out and rinse it with deionized water and ethanol in turn, Then heat treatment at 200°C for 30-60 minutes to obtain a gallium-doped titanium dioxide dense layer prepared on fluorine-doped tin dioxide conductive glass, the molar ratio of gallium atoms to titanium atoms in the gallium-doped tita...

Embodiment 2

[0039] The steps for preparing high-efficiency planar perovskite solar cells in this example are basically the same as in Example 1, except that in step (1), the molar ratio of gallium atoms to titanium atoms in the prepared gallium-doped titanium dioxide dense layer The ratio is 7:100.

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Abstract

The invention relates to a high-efficiency planar perovskite solar cell, the high-efficiency planar perovskite solar cell includes a transparent conductive substrate, an electron conduction layer, a perovskite layer, a hole conduction layer and a metal electrode; the electron conduction The layer is a dense layer of gallium-doped titanium dioxide prepared by a low-temperature process solution method. The present invention also relates to the preparation method of the above-mentioned high-efficiency planar perovskite solar cell, by adding gallium nitrate and low-temperature heat treatment in the process of hydrolyzing titanium tetrachloride to prepare the titanium dioxide dense layer to obtain the gallium-doped titanium dioxide dense layer, and using the gallium Dense layers of doped titania assemble perovskite solar cells. The planar perovskite solar cell of the present invention adopts the gallium-doped titanium dioxide dense layer prepared by the low-temperature process solution method as the electron conduction layer, and promotes the collection and conduction of the photogenerated electrons by the titanium dioxide electron conduction layer through gallium doping, which has The advantages of high photoelectric conversion efficiency, high cell efficiency, and easy preparation.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a high-efficiency planar perovskite solar cell and a preparation method thereof. Background technique [0002] In recent years, perovskite solar cells have attracted much attention due to their high photoelectric conversion efficiency. The photoelectric properties of the electron-conducting layer in perovskite solar cells determine the light absorption of the cell and the conduction and collection of photogenerated carriers, and its microstructure affects the microstructure and photoelectric properties of the perovskite layer, which determines to some extent It is particularly important because it affects the photoelectric conversion efficiency of the battery. [0003] Although the highest conversion efficiency of perovskite cells certified by NREL in the United States has exceeded 22%, the currently reported low-temperature CH 3 NH 3 PB 3-x Cl x The photoelectric conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCH10K71/00H10K30/30H10K2102/00Y02E10/549
Inventor 吴素娟刘慧陆旭兵刘俊明
Owner SOUTH CHINA NORMAL UNIVERSITY
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