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Method for preparing metal-doped low-energy gap nanocrystalline semiconductor photo-anode film

A metal doping, semiconductor technology, applied in the field of solar cells, can solve the problems of high cost of toxic by-products, limit the general application of silicon solar cells, etc., achieve good energy level matching effect, improve electron transfer efficiency, and good repeatability.

Inactive Publication Date: 2009-12-02
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, silicon solar cells occupy the dominant position in the market, but due to the high cost of silicon solar cells and the emission of a large number of toxic by-products in the manufacturing process, the widespread application of silicon solar cells is greatly limited.

Method used

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  • Method for preparing metal-doped low-energy gap nanocrystalline semiconductor photo-anode film

Examples

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Effect test

example 1

[0023] 1). Take 10ml 1M TiCl 4 Put hydrochloric acid aqueous solution in a beaker, measure 1ml of 0.2M ferric nitrate solution, the molar ratio of titanium salt to iron salt is 100; Oxyethylene ether AEO-3, after stirring evenly for 20 minutes, add 3M ammonia water precipitation agent at a rate of 3 seconds per drop to make it precipitate, and when the precipitation reaches pH=6, continue stirring for 1 hour, and let it stand for aging for 24 hours. It was washed with deionized water four times and alcohol exchanged twice, centrifuged, dried for 48 hours, and calcined at 500°C for 1 hour to obtain iron-doped nano-titanium dioxide powder A.

[0024] 2). Take 10ml 4M TiCl 4 Put aqueous hydrochloric acid solution in a beaker, add 10ml of absolute ethanol to it, and finally add 1ml of 0.2M iron nitrate solution, the molar ratio of titanium salt to iron salt is 100:0.5, stir for 2h, and age for 24h to obtain iron-doped nano Titanium dioxide sol B.

[0025] 3) Spin coating at a l...

example 2

[0029] 1). Take 10ml 4M TiCl 4 Put hydrochloric acid aqueous solution in a beaker, measure 3ml 0.2M ferric nitrate solution, make the molar ratio of titanium salt to iron salt 100:1.5, add it dropwise into titanium tetrachloride hydrochloric acid solution, and stir vigorously, add 10 drops of fatty alcohol poly Oxyethylene ether AEO-3, after stirring evenly for 20 minutes, add 3M ammonia water precipitation agent at a rate of 3 seconds per drop to make it precipitate, and when the precipitation reaches pH=9, continue stirring for 1 hour, and let it stand for aging for 24 hours. It was washed with deionized water four times and alcohol exchanged twice, centrifuged, dried for 48 hours, and calcined at 500°C for 1 hour to obtain iron-doped nano-titanium dioxide powder A.

[0030] 2). Take 10ml 4M TiCl 4 Put hydrochloric acid aqueous solution in a beaker, the concentration of hydrochloric acid is 6M, add 10ml of absolute ethanol to it, and finally add 3ml of 0.2M ferric nitrate s...

example 3

[0035] 1). Take 10ml 4M TiCl 4 Put hydrochloric acid aqueous solution in a beaker, measure 2ml of 0.5M tin chloride solution, make the molar ratio of titanium salt to tin salt 100:5, add it dropwise into titanium tetrachloride hydrochloric acid solution, stir vigorously, add 10 drops of fatty alcohol Polyoxyethylene ether AEO-3, after stirring evenly for 20 minutes, add 3M ammonia water precipitant at a rate of 3 seconds per drop to make it precipitate, and when the precipitation reaches pH=9, continue stirring for 1 hour, and let stand for aging for 24 hours. It was washed with deionized water four times and alcohol exchanged twice, centrifuged, dried for 48 hours, and calcined at 500°C for 1 hour to obtain tin-doped nano-titanium dioxide powder A.

[0036] 2). Take 10ml 4M TiCl 4 Put hydrochloric acid aqueous solution in a beaker, add 10ml of absolute ethanol to it, and finally 2ml of 0.5M tin chloride solution, the molar ratio of titanium salt to tin salt is 100:5, stir fo...

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Abstract

The invention belongs to the field of dye-sensitized solar cells and particularly provides a method for preparing a metal-doped low-energy gap nanocrystalline semiconductor photo-anode film. The method comprises the steps of: preparing low-energy gap metal-doped nano-titanium dioxide powder and a gel precursor, and then spinning the powder and gel on a conductive glass substrate to obtain a low-energy gap doped porous nano-titanium dioxide photo-anode film. The method realizes the control to the size of a semi-conductor titanium dioxide energy gap and the position of an LUMO energy level thereof through one, two or more different metals, widens an absorption spectral band of the photo-anode film, ensures that an anode can also absorb the sunlight to generate photogenerated electrons and cavities when electrons are transmitted, improves the utilization rate of the sunlight, also improves the energy level matching performance of the photo-anode film and dye molecules, improves an Femi energy level of a titanium dioxide anode material at the same time, remarkably enhances the open-circuit voltage, can greatly improve the photoelectric conversion performance of the cells, and improve the photoelectric conversion efficiency of the solar cells.

Description

Technical field: [0001] The invention belongs to the technical field of solar cells, in particular to a method for preparing a metal-doped low-energy-gap nanocrystalline semiconductor photoanode and its application in dye-sensitized solar cells. Background technique: [0002] In the world's energy structure, primary petrochemical energy such as oil, natural gas, and coal occupies a dominant position. With the sharp reduction of petrochemical energy and the increasingly serious environmental pollution, it is imminent to develop clean and renewable energy. Solar energy is an inexhaustible, inexhaustible, pollution-free, cheap energy that humans can use freely. Compared with wind energy and water energy, it is not restricted by geographical conditions and can be used on a large scale. [0003] At present, silicon solar cells occupy a dominant position in the market, but due to the high cost of silicon solar cells and the emission of a large number of toxic by-products in the m...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01M14/00H01L51/44H01L51/46H01L51/48B01J23/745B01J21/06B01J23/83B01J23/835
CPCY02E10/50Y02E10/549
Inventor 张敬畅付承宇杨秀英曹维良李海平
Owner BEIJING UNIV OF CHEM TECH
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