Observation of optical density modulation based on electrochromic tantalum oxide films

Chao Yi Tai, Jia Yuan Wu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We successfully used the sol-gel method to synthesize crack-free electrochromic (EC) tantalum pentoxide coatings on indium tin oxide glass at room temperatures. Colouring and bleaching states can be reversibly obtained with an applied voltage as low as 3.2 V. The achieved optical density modulation between the two states is estimated to be larger than 15%, which is the highest value among the reported tantalum oxide based EC films to date. Anomalous coloration, which is independent of the polarity of the biased voltage, is observed and explained by the double injection mechanism.

Original languageEnglish
Article number065303
JournalJournal of Physics D: Applied Physics
Volume41
Issue number6
DOIs
StatePublished - 21 Mar 2008

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