FOURIER-TRANSFORM RAMAN-STUDY OF ELECTROCHROMIC CRYSTALLINE HYDRATE FILMS WO3-CENTER-DOT-1 3(H2O)/

Evolution of the vibrational spectra of electrochromic thin films WO3. 1/3(H2O) during coloration-bleaching process has been studied by Fouri er Transform Raman Spectroscopy. It is shown that protons or deuterons inserted into the film during the electrochromic coloration do not pl ay only passive role of charge compensators but strongly distort the f ilm lattice as well. The lattice distortion is reversible during bleac hing process up to the charge density of 30 mC/cm(2). For the larger c oloration density the strong enhancement of Raman effect was observed.