Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 4, Pages 4293-4298Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.11.010
Keywords
Tungsten oxide film; Electrochemical anodization; Electrochromism
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Funding
- National Science Council of Taiwan [NSC 100-3113-E-006-004]
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Tungsten oxide (WO3) films prepared by annealing electrochemically anodized metallic tungsten (W) films deposited by radio-frequency sputtering were characterized. Tungsten oxide films of various morphology, crystallinity, and porosity can be prepared by carefully altering the anodization time (20-50 min) and annealing temperature (450-550 degrees C). The film obtained after 40 min of anodization, and that annealed at 500 degrees C shows the best electrochromic performance with optical modulation of 43.6% and coloration efficiency of 42.8 cm(2)/C. The effects of anodization time and annealing temperature on microstructure and electrochromic properties were addressed. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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