TiO2 nanowire array film light anode and preparation method thereof

Abstract

The invention discloses a TiO2 nanowire array film light anode and a preparation method thereof. The structure of the light anode comprises common glass, an F-doped SnO2 transparent conducting film and a TiO2 nanowire array film. The preparation method comprises the following step of directly synthesizing the TiO2 nanowire array film which is used as a light anode of a dye-sensitization solar battery on a FTO (Tin Oxide) glass substrate by using the mixture of concentrated hydrochloric acid, deionized water and tetrabutyl titanate as a reaction precursor in a hydrothermal synthesis technique. The method controls the diameters and densities of nanowires by changing the ratio of the concentrated hydrochloric acid to the deionized water in the reaction precursor and the concentration of the tetrabutyl titanate, controls the lengths of the TiO2 nanowires by changing reaction time, and ensures that the electrode has higher light capturing efficiency, improves the transporting capacity of photon-generated carriers and reduces the compounding process of the photon-generated carrier by utilizing higher light utilization rate and favorable electron shifting properties of the TiO2 nanowires, thereby improving the photoelectric conversion efficiency of the dye-sensitization solar battery.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Nanowire array thin film photoanode and its preparation method. 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 properties of nan...

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, the photogenerated electrons are affected by the capture and heat release of the defect state energy level on the particle surface during the transmission process, which increases the electron recombination rate and reduces the diffusion coefficient, which limits the conversion efficiency of the battery.

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