Porous TiO2 nanocrystalline thin film having three-dimensional nanorod floral structure as well as preparation method and application of porous TiO2 nanocrystalline thin film

Abstract

The invention provides a porous TiO2 nanocrystalline thin film having a three-dimensional nanorod floral structure, a preparation method of the porous TiO2 nanocrystalline thin film and application of the porous TiO2 nanocrystalline thin film as a photoanode of a dye-sensitized solar cell, and belongs to the technical field of the dye-sensitized solar cells. The dye-sensitized solar cell is composed of positive FTO, the photoanode, an electrolyte solution (I- / I3-) and a Pt counter electrode, wherein the electrolyte solution is injected into the cell by use of a vacuum backfilling method, and the structure of the cell is as shown in a figure I; the dye-sensitized solar cell is characterized in that the photoanode is made of the porous TiO2 nanocrystalline thin film having the three-dimensional nanorod floral structure; the porous TiO2 nanocrystalline thin film has an excellent light scattering effect. Incident light goes into the porous TiO2 nanocrystalline thin film through the FTO, and as the thin film has a special porous structure and is capable of reflecting and effectively absorbing the incident light a plurality of times, the utilization rate of the incident light can be greatly increased and the purpose of improving the photoelectric conversion efficiency is achieved.

Description

technical field [0001] The invention belongs to the technical field of dye-sensitized solar cells, in particular to a porous TiO with a three-dimensional nanorod flower structure 2 Nanocrystalline thin films, methods of preparation and their use as photoanodes for dye-sensitized solar cells. Background technique [0002] With people's urgent need for green energy, solar energy, as a clean and pollution-free renewable energy, has now attracted widespread attention from all over the world. In the effective use of solar energy, solar cells are currently the fastest growing and most dynamic research field. Silicon-based solar cells are the earliest studied and one of the most mature solar cells at present. However, due to the expensive raw materials of silicon-based cells and the cumbersome production process, people are constantly looking for and developing low-cost solar cells as monocrystalline silicon solar cells. replacement of. In 1991, Michael from the Institute of Tec...

AI Technical Summary

Problems solved by technology

One-dimensional TiO 2 Nanostructures, such as nanotubes, nanowires, and nanoribbons, have been widely studied due to their fast electron transport rates, but one-dimensional nanostructures have limited specific surface area, which is not conducive to the adsorption of more dyes, and their ability to scatter light is average.

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