TiO_2纳米晶半导体电极及有机-无机电致变色器件的研究

TiO_2 Nanocrystralline Semiconductor Electrode and the Organic-Inorgnic Electrochromic Devices

通过丝网印刷工艺,制备了具有高的比表面积的纳米晶氧化钛薄膜,通过有机／无机复合,在氧化钛薄膜表面吸附了单层的电变色子,制备成纳米晶电极并且装配成三明治结构的电致变色器件．通过紫外可见分光光度计表征,该器件的着色态透过率为4％,退色态透过率为85％．其在智能窗、平板显示器、电子书和电子报纸等领域具有潜在的应用前景．

Nanocrystralline TiO2 semiconducting electrode was prepared by using a screen-printing technique. The electrode has very high specific surface-to-volum area which is crucial for the absorption of more chromophores on the surface. The electrochromic device was assembled by using a sandwich structure after the electrode absorbed chromophore molecules. The electrochromic device was characterized by UVoVis spectra. The electrochromic device has a very high transparency at its bleached states （85%）, and deep violet at its colored states （4%）, which has potential use in smart window, flat panel display, electric book and electric papers.