Characterization of electrochromic tungsten oxide film from electrochemical anodized RF-sputtered tungsten films

Chun Kai Wang, Chung Kwei Lin, Ching Lin Wu, Sanjaya Brahma, Sheng Chang Wang, Jow Lay Huang

Research output: Contribution to journalArticle

22 Citations (Scopus)


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 °C). The film obtained after 40 min of anodization, and that annealed at 500 °C shows the best electrochromic performance with optical modulation of 43.6% and coloration efficiency of 42.8 cm2/C. The effects of anodization time and annealing temperature on microstructure and electrochromic properties were addressed.

Original languageEnglish
Pages (from-to)4293-4298
Number of pages6
JournalCeramics International
Issue number4
Publication statusPublished - May 2013



  • Electrochemical anodization
  • Electrochromism
  • Tungsten oxide film

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

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