Preparation of zno nanorod/tio2 nanoparticle composite thin films by post-intercalation method

Abstract

A method for preparing a ZnO nanorod / TiO2 nano-particle composite film is characterized in that a post-embedding method is used for preparing the ZnO nanorod / TiO2 nano-particle composite film. The composite film comprises conducting glass, a TiO2 nano-particle multi-hole film and a ZnO nanorod. According to the ZnO nanorod / TiO2 nano-particle composite film, electron collecting efficiency can be improved, compared with an existing TiO2 film, converting efficiency is improved by 6.5%, and meanwhile the composite film is simple in preparing technology, the conditions are mild, cost is low, and industrial production can be easily achieved.

Description

technical field [0001] The invention relates to the research field of development and utilization of solar cells, in particular to a method for preparing a dye-sensitized solar cell composite film, which is characterized in that ZnO nanorods / TiO are prepared by a post-embedding method 2 Nanoparticle composite films. Background technique [0002] Dye-sensitized Solar Cells (DSC) have high theoretical conversion efficiency, abundant raw materials, stable materials, simple manufacturing process, low cost, small dependence on temperature and incident light angle, large-area production and low light intensity. There are still many advantages such as high conversion efficiency, and it is considered to be one of the most promising solar cells. Since 1991 Switzerland's M. Since the professor made a breakthrough in the research of dye-sensitized solar cells, the United States, Japan, Europe and other developed countries and regions have invested a lot of money in research and deve...

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Problems solved by technology

But at the same time will encounter some other problems: due to TiO 2 The three-dimensional network structure of the porous film, the transmission path of electrons is not straight, but tortuous, which increases the electron transmission path and aggravates the loss of electrons; in addition, according to the diffusion model, electrons in TiO 2 The explanation of the transport in the porous film, the driving force of the electrons in the transport process comes from the concentration gradient of the electrons themselves, and the TiO 2 The crystal form of nanoparticles is not complete, and there are defects, which constitute a "trap" for electrons, and they form a serious obstacle to the transmission of electrons.

All kinds of ZnO / TiO reported in the above literature 2 The preparation process of the composite film is complicated, and the photoelectric efficiency obtained after the dye-sensitized solar cell is assembled is relatively low, which is not suitable for the commercial production of the dye-sensitized solar cell

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