Rare earth-doped titanium dioxide photo-anode for dye-sensitized solar cell and preparation method thereof

A technology of solar cells and titanium dioxide, applied in the field of new material technology and new energy, can solve the problems of limiting the photoelectric conversion efficiency of batteries, inability to absorb infrared light, etc. Effect

Active Publication Date: 2012-07-11
HUAQIAO UNIVERSITY
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Problems solved by technology

However, the currently used dyes can hardly absorb infrared light, which limits the photoelectric conversion efficiency of the battery.

Method used

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Embodiment Construction

[0015] The rare earth-doped titanium dioxide photoanode for dye-sensitized solar cells disclosed by the invention is prepared from rare earth compounds and n-butyl titanate (molar ratio 1:100-1:10).

[0016] The steps of the specific preparation method are as follows:

[0017] The first step, preparation of titanium dioxide nanocrystalline colloid: Add n-butyl titanate dropwise to 10 times deionized water under stirring at 500 rpm, immediately precipitate, continue stirring for 30 minutes, then perform suction filtration and wash 2- 3 times a white precipitate was obtained. Pour the precipitate into a mixed solution of nitric acid and acetic acid with a volume ratio of 1:10, adjust the pH of the solution to 1, keep the temperature at 80°C, and keep stirring until a transparent blue sol is formed. One-third of the sol was firstly treated under hydrothermal conditions at 200°C for 12 hours. Pour the hydrothermally treated colloid back into the original sol for secondary hydrot...

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Abstract

The invention discloses a rare earth-doped titanium dioxide photo-anode for a dye-sensitized solar cell. The photo-anode is prepared from a rare earth compound and tetrabutyl titanate by the following steps of: preparing nano-crystalline titanium dioxide colloid with the tetrabutyl titanate by a hydrothermal method; dissolving the rare earth compound in solution of nitric acid to obtain solution of nitrate, hydrolyzing the tetrabutyl titanate to obtain titanium dioxide sol, adding the solution of nitrate into the sol and processing the mixture by the hydrothermal method and high temperature calcining to obtain the rare earth-doped titanium dioxide powder; and adding the rare earth-doped titanium dioxide powder into the titanium dioxide colloid, scattering, coating and calcining the mixture at a high temperature to prepare the rare earth-doped titanium dioxide photo-anode. The photo-anode and the preparation method have up-conversion luminescence function and p-type doping effect and improve the photocurrent and photovoltage of the cell, the Fermi level of the titanium dioxide and the photoelectric conversion efficiency of the cell. The method is used for improving the photoelectric conversion efficiency of the dye-sensitized solar cell with simple process and abundant raw materials and can also be used for the related fields of other solar cells and the like.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, and relates to the synthesis of rare earth-doped titanium dioxide powder by steps such as sol-gel, hydrothermal reaction, and solid-phase calcination, and is prepared for dye sensitization through conventional coating technology. Rare earth-doped titania photoanode technology for solar cells. Background technique [0002] Dye-sensitized nanocrystalline solar cells are a new type of solar cells developed in the 1990s. They have the characteristics of low cost, simple preparation process, long service life and good environmental compatibility, and have good development and application prospects. . At present, dye-sensitized solar cells mostly use titanium dioxide porous nanocrystals as electron transporters, and dyes as photosensitizers. Fermi level. However, currently used dyes can hardly absorb infrared light, which limits the photoelectric conversion efficiency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/44H01L51/48
CPCH01G9/2059Y02E10/542H01G9/2031H01G9/209
Inventor 吴季怀谢桂香林建明黄妙良
Owner HUAQIAO UNIVERSITY
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