nanocrystalline TiO_2 电影电极被大音阶的第五音胶化方法在不同锻烧的温度准备,它有不同电影厚度,一致透明性,以及光电的高度和机械稳定性的特征。光电的大小证明那锻烧的温度和电影厚度能显著地影响电极的光电的性质。在 450 deg C 锻烧的电影是有 highcrystallinity 和强壮的光电的活动的锐钛矿阶段,并且显示出最大的光电流。当温度比 450 deg C 低时,因为很多缺点,这部电影在这部电影有更弱的结晶度,并且这不为 pho-togenerated 搬运人的运输是有利的。并且在比 450 deg C 高的温度,电极的光电流被减少在这部电影的到期的 toanatase 金红石阶段转变。电影厚度的增加对紫外光的改进有利(紫外) 吸收总计,它将改进这部电影的光电的活动。但是,过多的厚度将在电极在减小增加 theelectron 洞对,和结果的再结合率“ s photoelectric 活动。另外,在电极生产的光电流的反应敏感和稳定性与偏爱潜力有关。在 0.4 V 的一个潜力,电极显示出 30.8 亩 Aand 的浸透的光电流 ~ 的一反应时间 1 s,建议准备 TiO_2 拍摄电极能被用于做紫外传感器。
The nanocrystalline TiO2 film electrodes were prepared by sol-gel method at different calcining temperatures, which had characteristics of different film thickness, uniform transparency, as well as high photoelectric and mechanical stability. Photoelectric measurements show that calcining temperature and film thickness could remarkably influence the photoelectric properties of the electrodes. The film calcined at 450℃ is anatase phase with high crystallinity and strong photoelectric activity, and shows the largest photocurrent. When the temperature is lower than 450℃, the film has weaker crystallinity because of a large number of defects in the film, and this is not favorable for the transport of the photogenerated carriers. And at a temperature higher than 450℃, the photocurrent of the electrode is decreased due to anatase-rutile phase transition in the film. The increase in film thickness is favorable to the enhancement of ultraviolet light (UV) absorption amount, which would improve the photoelectric activity of the film. But, excessive thickness will increase the recombination rate of the electron-hole pairs, and result in a reduction in electrode's photoelectric activity. In addition, the response sensitivity and stability of the photocurrent produced in the electrode are related to bias potential. At a potential of 0.4 V, the electrode shows a saturated photocurrent of 30.8 μA and a response time of -1 s, suggesting that the prepared TiO2 film electrode can be used for making UV sensors.