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High-efficiency planar perovskite solar cell and fabrication method thereof

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: 2018-03-13
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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  • High-efficiency planar perovskite solar cell and fabrication method thereof

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preparation example Construction

[0027] The method for preparing a high-efficiency planar perovskite solar cell provided by the present invention includes the following steps:

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

[0029] (2) Preparation of the perovskite layer: the molar ratio of CH 3 NH 3 I and PbCl 2 Dissolve in dimethylformamide to obtain a perovskite precursor solution. The gallium-doped titanium dioxide dense layer obt...

Embodiment 1

[0033] The preparation of the high-efficiency planar perovskite solar cell in this embodiment is specifically carried out as follows:

[0034] (1) Preparation of the dense layer of gallium-doped titanium dioxide: first add gallium nitrate to the ice-water mixture, and then add a titanium tetrachloride aqueous solution with a volume ratio of titanium tetrachloride to water of 1.5 to 4:100, and configure gallium doped Mixed titanium dioxide colloidal solution. Then take the clean fluorine-doped tin dioxide conductive glass and irradiate it with an ultraviolet lamp for 10-20 minutes, then soak it in a gallium-doped titanium dioxide colloidal solution at 70°C for 50 minutes, take it out, and rinse with deionized water and ethanol. Then heat treatment is performed 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 titanium diox...

Embodiment 2

[0039] The steps for preparing a high-efficiency planar perovskite solar cell in this embodiment are basically the same as those in embodiment 1, except that: in step (1), the moles of gallium atoms and titanium atoms in the gallium-doped titanium dioxide dense layer prepared 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 comprises a transparent conductive substrate, an electron conduction layer, aperovskite layer, a hole conduction layer and a metal electrode, wherein the electron conduction layer is a gallium-doped titanium dioxide compact layer fabricated by a low-temperature process solution method. The invention also relates to a fabrication method of the high-efficiency planar perovskite solar cell. The gallium-doped titanium dioxide compact layer is obtained by adding gallium nitrateinto the process of fabricating the titanium dioxide layer by hydrolysis of titanium tetrachloride and by low-temperature heat treatment, and the perovskite solar cell is assembled by the gallium-doped titanium dioxide compact layer. In the planar perovskite solar cell, the gallium-doped titanium dioxide compact layer prepared by the low-temperature process solution method is used as the electronconduction layer, collection and conduction of photo-induced electron by the titanium dioxide electron conduction layer are facilitated by gallium doping, so that the planar perovskite solar cell hasthe advantages of high photoelectric conversion efficiency and high battery efficiency and is easy to fabricate.

Description

Technical field [0001] The invention belongs to the technical field of solar cells, and particularly relates 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 a perovskite solar cell 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 of the photoelectric conversion efficiency of the battery. [0003] Although the highest conversion efficiency of perovskite batteries certified by NREL in the United States has exceeded 22%, the current reported low-temperature CH 3 NH 3 PbI 3-x Cl x The photoelectric conversion...

Claims

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Application Information

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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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