Preparation method of composite nanowire array with one-dimensional ZnO(zinc oxide)-TiO2(titanium dioxide) core-shell structure

Abstract

A preparation method of a composite nanowire array with a one-dimensional ZnO(zinc oxide)-TiO2(titanium dioxide) core-shell structure. In the whole preparation process, a wet chemistry method is adopted. The preparation method comprises the following steps: at first, a ZnO seed layer is prepared on conductive glass in a sol-gel method, then a ZnO nanowire array is grown on the seed layer in a liquid-phase deposition method, and next a TiO2 shell layer is prepared on a ZnO nanowire array in a circulating adsorption reaction method, so as to obtain the composite nanowire array with the one-dimensional ZnO-TiO2 core-shell structure. The preparation method has the advantages that (1) compared with the other methods (such as a chemical meteorology deposition method, an atom layer deposition method and a magnetron sputtering method), the preparation method has a simple process, does not require complex equipment and severe environments, and is low in cost; (2) the preparation method can control the diameter and the length of the ZnO nanowire and the thickness of the TiO2 shell layer conveniently; and (3) the preparation method can be combined with a photoanode preparation method of a quantum dot dye-sensitized solar cell conveniently to facilitate the research of the cell performance.

Description

Technical field [0001] The invention relates to a preparation method of a core-shell structure composite nanowire array, in particular a preparation method of a one-dimensional zinc oxide-titanium dioxide core-shell structure composite nanowire array applied to the photoanode of a dye / quantum dot sensitized solar cell. Background technique [0002] Solar cells can directly convert solar cells into electrical energy, and are considered to be the most effective way to use solar energy, so they have been highly valued by countries all over the world. At present, the solar cells that have been practically used are mainly silicon-based solar cells, which have higher efficiency and better stability, but their high manufacturing cost limits their large-scale application. Therefore, in addition to improving the commercialization of low-cost and high-efficiency silicon-based solar cells, researchers are more actively exploring new types of solar cells. Among many solar cells, dye / quantum...

AI Technical Summary

Problems solved by technology

Although the first two methods can precisely control the thickness of the titanium dioxide layer and obtain a zinc oxide-titanium dioxide core-shell structure composite array with uniform thickness and controllable morphology, the preparation process requires high temperature and special equipment, and the manufacturing cost is high, which is not conducive to Large-scale promotion

The magnetron sputtering method not only requires expensive equipment and a vacuum environment, but also cannot obtain a titanium dioxide shell with uniform thickness by a simple method. The titanium dioxide on the top of the composite nanowire structure prepared is always much thicker than the titanium dioxide on the sidewall of the nanowire.

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