TiO_2 Nanocrystralline Semiconductor Electrode and the Organic-Inorgnic Electrochromic Devices

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 UV-Vis 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.