Preparation method of composite electrode of dye sensitized solar cell

Abstract

The invention provides a composite electrode of a dye sensitized solar cell and a preparation method thereof. The method comprises the following steps: selecting a substrate of common glass; preparing an F-doped SnO2 transparent conducting film on the substrate to obtain an FTO glass substrate; preparing a TiO2 nanowire array on the F-doped SnO2 transparent conducting film; printing a TiO2 nanocrystalline porous film on the surface of the prepared TiO2 nanowire array by screen printing; annealing to volatilize the organic solvent in TiO2 slurry of the TiO2 nanocrystalline porous film to obtain a TiO2 nanowire array / TiO2 nanocrystalline porous composite film; and soaking the TiO2 nanowire array / TiO2 nanocrystalline porous composite film in dye solution, taking the composite film out of thedye solution, then washing off the residual dye solution on the surface of the composite film, and airing the composite film, thus obtaining the TiO2 nanowire array / TiO2 nanocrystalline porous film composite electrode, wherein the TiO2 nanowire array can provide a direct electronic channel and reduce electronic recombination; and the TiO2 nanocrystalline porous film has higher specific surface area and is beneficial to adsorption of dyes.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a TiO 2 Preparation method of nanowire array and nanocrystalline porous film composite electrode. Background technique [0002] Due to its relatively simple structure and low cost, dye-sensitized solar cells have attracted worldwide attention as a new generation of solar cells, and are considered to be new solar cells that can replace silicon solar cells. Dye-sensitized solar cells are mainly composed of the following parts: photoanode, electrolyte and cathode. The photoanode and cathode are made into a sealed cavity into which electrolyte is poured, thus forming a dye-sensitized solar cell unit. Traditional dye-sensitized solar cell photoanodes generally use pure TiO 2 Nanocrystalline porous film, although the porous film can fully absorb the dye, there are a large number of grain boundaries, which makes the electron diffusion coefficient small and the recombination rate high, whic...

AI Technical Summary

Problems solved by technology

Traditional dye-sensitized solar cell photoanodes generally use pure TiO 2 Nanocrystalline porous film, although the porous film can fully absorb dyes, there are a large number of grain boundaries, which makes the electron diffusion coefficient small and the recombination rate high, which restricts the improvement of photoelectric conversion efficiency of dye-sensitized solar cells

Although one-dimensional nanostructures such as nanowires and nanotubes can provide direct electronic pathways, increase the diffusion length of electrons, reduce electronic recombination, and increase electronic life, their adsorption capacity for dyes is limited, which restricts the use of nanometers. The main bottleneck of improving the photoelectric conversion efficiency of the battery is to use the line array as a photoanode

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