Effect Of LiCl On The Structure And Photoelectric Properties Of TiO 2

The development and utilization of solar energy is the most high-profile in clean energy, and TiO₂ nonmaterial is the most promising light anode material in recent years. The band gap of titanium dioxide is 3.2eV, it belongs to the wide band gap semiconductor, according to the theory of energy band transitions, it can only receive ultraviolet light energy in nature, which makes the light utilization efficiency of TiO₂ is low as a solar cell material. Thus, by improving the preparation method to narrow energy band gap, improve the size and growth direction of surface nanostructures, broaden absorption band, increase the specific surface area, modify preferential growth of favorable crystal plane, becomes research group’s target.In this paper, it take hydrothermal method to make titanium sheet metal and tetramethylammonium hydroxide（TMAOH） react, anatase nanostructures（single crystal） can grow on a titanium substrate. We find that spectral absorption band of Ti / TiO₂ material extends from ultraviolet to infrared, which is significantly different from the nature of pure TiO₂, through the system characterization and analysis, the presence TiO₂ in the reaction of an organic base is found deficiency oxygen seriously, N may be doped. The third chapter elaborates the preparation and characterization of photoelectric properties of Ti / TiO₂ and finds that the nature of the UV- visible- near infrared absorption spectrum in sample is good: the visible and near infrared spectral bands still have a great absorption, which is highlights in the research.Development of nanotechnology makes materials science and technology have a huge leap, the additive is possible to control the size, shape, crystalline and growth direction on the nanoscale. By adding LiCl to the reaction solution, it can control size and shape in the above materials and modify the performance the material. Compared with non-LiCl, the optical and electrical properties improve great, especially the 0.025mol/L LiCl best.The short-circuit current and photocurrent response is 3 times than without LiCl under illumination, absorption properties of the UV- visible- near infrared in the infrared absorption spectrum range is very good.