Optical and electrochromic properties of CVD mixed MoO3–WO3 thin films

Thin films of MoO3–WO3 were deposited by chemical vapor deposition. Raman and Auger Spectroscopies were used to characterize bonds configuration and depth profile of the chemical composition of the films. The transparency of MoO3–WO3 films was measured by UV–VIS spectroscopy and showed 60% transmitt...

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Published inVacuum Vol. 76; no. 2-3; pp. 195 - 198
Main Authors Ivanova, T., Gesheva, K., Hamelmann, F., Popkirov, G., Abrashev, M., Ganchev, M., Tzvetkova, E.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 05.11.2004
Subjects
CVD method
Electrochromic
Mixed oxide films
MoO3
MoO3
CVD method
Electrochromic
Mixed oxide films
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Summary:Thin films of MoO3–WO3 were deposited by chemical vapor deposition. Raman and Auger Spectroscopies were used to characterize bonds configuration and depth profile of the chemical composition of the films. The transparency of MoO3–WO3 films was measured by UV–VIS spectroscopy and showed 60% transmittance in the visible range. An electrochromic cell was made, based on the CVD-deposited MoO3–WO3 film as working electrode, sol–gel TiO2–V2O5 film as counter electrode and electrolyte based on LiClO4 dissolved into propylene carbonate. Standard calomel electrode (SCE) was used as reference electrode. Cyclic voltamograms (applied voltage vs. current) were taken in a range of −1V to +1V, and at the same time the transmittance change was measured as a function of applied voltage. The electrochromic cell after 1500 cycles did not change its performance and physical appearance. The coloring goes very fast and the bleaching process takes 2–3min.
ISSN:0042-207X
1879-2715
DOI:10.1016/j.vacuum.2004.07.012