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采用水解胶溶法和旋转涂膜法分别制备出TiO2纳米粒子溶胶和TiO2/ITO薄膜,采用浸泡法制备出苯封四聚苯胺(聚苯胺)/TiO2/ITO薄膜电极.利用表面光电压谱、光致循环伏安和光电流作用谱测定了TiO2的禁带宽度和表面态能级、聚苯胺的HOMO-LUMO能级宽度和双极化子能级,确定了聚苯胺/TiO2/ITO薄膜电极能带结构.进一步分析了聚苯胺/TiO2/ITO薄膜电极的光电转换特性及光致界面电荷转移的机理.
The sol-gel method and the spin-coating method were used to prepare TiO2 nanoparticle sol and TiO2 / ITO thin film, respectively, and the benzene polyaniline (polyaniline) / TiO2 / ITO thin film electrode was prepared by immersion method.Using surface photovoltage spectroscopy The bandgap and surface state energy levels of TiO2, HOMO-LUMO energy level width and bipolar energy level of polyaniline were measured by cyclic voltammetry and photocurrent spectrum. The energy bands of polyaniline / TiO2 / ITO thin film electrodes were determined Structure.The photoelectric conversion properties of polyaniline / TiO2 / ITO thin film electrodes and the mechanism of photointerface charge transfer were further analyzed.