Preparation method of dye-sensitized solar cell grapheme-doped composite electrode

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 lif...

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