Electrochemical and optical properties of biphenyl bridged-dicarbazole oligomer films: Electropolymerization and electrochromism

KOYUNCU S., GÜLTEKİN B., ZAFER C., Bilgili H., Can M., Demic S., ...More

ELECTROCHIMICA ACTA, vol.54, no.24, pp.5694-5702, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Review
  • Volume: 54 Issue: 24
  • Publication Date: 2009
  • Doi Number: 10.1016/j.electacta.2009.05.014
  • Journal Name: ELECTROCHIMICA ACTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5694-5702
  • Keywords: Carbazole, Electrochemical polymerization, Electrochromic devices
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

4,4'-Di(N-carbazoyl)biphenyl monomer (CBP) was synthesized and coated onto ITO-glass surface by electrochemical oxidative polymerization. Its CV shows two distinct one-electron and stepwise oxidation processes occurred at 1.29 and 1.61 V. By using this property, the monomer was electrochemically polymerized separately at these oxidation states and thus, two different oligomer films were obtained afterwards. Their spectro-electrochemical and electrochromic properties were also investigated. Switching ability of the oligomers was evaluated by kinetic studies upon measuring the percent transmittance (%T) at their maximum contrast point, indicating that these oligomers were found to be suitable material for electrochromic devices. (C) 2009 Elsevier Ltd. All rights reserved.