Titanium dioxide nanoflower film photoanode and preparation method thereof

Abstract

The invention discloses a titanium dioxide (TiO2) nanoflower film photoanode and a preparation method thereof. The photoandoe consists of common glass, a fluorine (F) doped tin dioxide (SnO2) transparent conductive film and a TiO2 nanoflower film. The preparation method comprises the following step of: directly synthesizing the TiO2 nanoflower film serving as the photoanode of a dye-sensitized solar cell on a FTO glass substrate by taking a mixture of concentrated hydrochloric acid, deionized water, toluene and butyl titanate as a reaction precursor and by hydro-thermal synthesis technology, wherein the shape of nanoflowers and the diameter and the length of nanorods consisting of the nanoflowers can be controlled by changing the ratio of the concentrated hydrochloric acid to the deionized water to the toluene and the concentration of the butyl titanate in the reaction precursor. By using higher light utilization efficiency and excellent electron transfer characteristic of TiO2 nanowires, the photoanode has the advantages of ensuring higher light trapping efficiency of electrodes, improving the transportation capacity of photon-generated carriers, reducing the recombination process of the photon-generated carriers, and consequently improving the photoelectric conversion efficiency of the dye-sensitized solar cells.

Description

technical field [0001] The present invention specifically relates to a kind of TiO 2 Nanoflower film photoanode and preparation method thereof. Background technique [0002] TiO 2 Nanostructured materials have broad application prospects in dye-sensitized solar cells, optoelectronic devices, photocatalysts, sensors, etc., and are research objects that have an important impact on future economic and social development in the field of nanomaterials research today. Controllable synthesis of them has far-reaching significance. With the deepening of research work, people's research on nanomaterials is increasingly emphasizing controllability, which not only requires the preparation of ideal crystal structures, chemical compositions, shapes and sizes, but also the ability to organically assemble various nanostructures. It can be controlled and constructed into various complex structural components, so that it has the unique mechanical, electrical, optical and chemical propertie...

AI Technical Summary

Problems solved by technology

Traditional DSSC photoanodes generally use nano-TiO 2 porous film, TiO 2 Although the porous film can fully absorb the dye, there are a large number of grain boundaries, which cause the photogenerated electrons to be affected by the capture and heat release of the defect state energy level on the particle surface during the transmission process, resulting in a small electron diffusion coefficient and an increased recombination rate, which restricts the dye-sensitivity. Improvement of photoelectric conversion efficiency of solar cells

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