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A kind of preparation method of dye-sensitized solar cell doped graphene composite electrode

A solar cell and graphene composite technology, applied in the field of solar cells, can solve the problems of less dye, affecting electron diffusion coefficient, high recombination rate, etc.

Active Publication Date: 2016-01-20
GUANGDONG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

The photoanode of traditional dye-sensitized solar cells generally adopts pure titanium oxide nanocrystalline porous film. Although this film can fully absorb dye, there are a large number of grain boundaries, which affect the electron diffusion coefficient and high recombination rate. The structure can provide a direct electron path, increase the diffusion length of electrons, reduce electron recombination, and increase electron lifetime. The disadvantage is that the amount of dye adsorbed is less

Method used

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Embodiment Construction

[0023] Step 1: Take a clean conductive glass (FTO) and prepare TiO by hydrothermal method 2 Nano-array, using butyl titanate as titanium source, reacts with hydrochloric acid and deionized water, the volume ratio of titanium source, hydrochloric acid and deionized water is 1:40:40, the hydrothermal reaction temperature is 150 ° C, the hydrothermal reaction The time is 20 hours, and its advantage is that it can provide a direct electron path, increase the diffusion length of electrons, reduce electron recombination, and increase electron life.

[0024] Step 2: Prepare graphene, the specific method is: add 4g of natural flake graphite into 92mL of concentrated sulfuric acid, stir well and then add 2gNaNO 3 and 12gKMnO 4 , stirred in a constant temperature water bath at 0~0.5°C for 2 hours; then raised the temperature of the constant temperature water bath to 35°C and continued to stir for 2 hours; then raised the temperature of the constant temperature water bath to 99°C and co...

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Abstract

The invention discloses a preparation method of a dye-sensitized solar cell grapheme-doped composite electrode. The preparation method comprises the following steps that: a hydrothermal method is adopted to prepare a TiO2 nano array on conductive glass, and as a result, direct electron channels are provided, and the diffusion length of electrons can be increased, and electron recombination can be reduced, and the lifetime of the electrons can be increased; the hydrothermal method is adopted to prepare TiO2-graphene nano particles, and as a result, doped graphene can not only reduce the recombination of photogenerated electrons and holes, but also can enhance the capture of light, and the number of the photogenerated electrons can be increased; the TiO2-graphene nano particles are printed on the TiO2 nano array through a screen printing method, and as a result, a larger specific surface area can be obtained, and dye adsorption quantity can be increased; an organic solvent can be removed from a slurry through sintering; and the dye is adsorbed, and the dye-sensitized solar cell grapheme-doped composite electrode can be obtained.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a method for preparing a dye-sensitized solar cell doped graphene composite electrode. Background technique [0002] Dye-sensitized solar cells have attracted much attention because of their high theoretical conversion efficiency, simple process, small dependence on temperature and incident light angle, low energy consumption in the preparation process, and low cost. Dye-sensitized solar cells mainly include photoanode, electrolyte and counter electrode. The photoanode of traditional dye-sensitized solar cells generally adopts pure titanium oxide nanocrystalline porous film. Although this film can fully absorb dye, there are a large number of grain boundaries, which affect the electron diffusion coefficient and high recombination rate. The structure can provide a direct electron path, increase the diffusion length of electrons, reduce electron recombination, and increase electron life...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20
CPCY02E10/542Y02P70/50
Inventor 张海燕王蓉王文广
Owner GUANGDONG UNIV OF TECH
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