Efficient Electrochromic Materials Based on PEDOT/WO3 Composites Synthesized in Ionic Liquid Media

Dulgerbaki C., ÖKSÜZ A.

ELECTROANALYSIS, vol.26, no.11, pp.2501-2512, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 11
  • Publication Date: 2014
  • Doi Number: 10.1002/elan.201400369
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2501-2512
  • Süleyman Demirel University Affiliated: Yes


A series of ionic liquids such as 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (BMIMTFSI), and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide (BMPTFSI) were used as both electrochemical growth media and electrolytes for the synthesis of poly(3,4-ethylenedioxythiophene)/tungsten oxide (PEDOT/WO3) composite films for electrochromic device applications. The surface and electrochromic properties of the composites changed depending on characteristic of ionic liquids. The maximum transmittance window 41.3% was obtained at 620 nm with the operating potentials between +2 and -2 V, for the BMPTFSI synthesis medium. Optical transmittance spectra results of EC devices indicated that optical modulations values were 32.8% and 22.3% at 620 nm for the PEDOT/WO3 composites synthesized in the presence of BMIMPF6 and BMIMTFSI, respectively.