Abstract
Electrochromic tungsten trioxide thin films were prepared by chemical vapor deposition. The source material was tungsten carbonyl. Amorphous tungsten trioxide thin films were obtained at a substrate temperature of 300°C. Reduction and oxidation of the films in a 0.3M propylene carbonate solution resulted in desirable changes in optical absorption. Coulometry indicated that the coloration efficiency was 230 cm2 · C−1.
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