Electrosynthesis and characterization of an electrochromic material containing biscarbazole-oxadiazole units and its application in an electrochromic device

UDUM Y., GÜNDOĞDU HIZLIATEŞ C., Ergun Y., Toppare L.

THIN SOLID FILMS, vol.595, pp.61-67, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 595
  • Publication Date: 2015
  • Doi Number: 10.1016/j.tsf.2015.10.055
  • Journal Name: THIN SOLID FILMS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.61-67
  • Keywords: Polymers, Optical properties, Electrochemical properties, Electrochemical techniques, CONJUGATED POLYMERS, 1,3,4-OXADIAZOLE DERIVATIVES, CARBAZOLE, ANTIBACTERIAL, CHEMISTRY, FLUORENE, CORE
  • Dokuz Eylül University Affiliated: Yes

Abstract

Electroactive poly(2,5-Bis(9-methyl-9 H-carbazol-3-yl)-1,3,4-oxadiazole) (PolyBCO) film was synthesized to form a highly stable conducting polymer with excellent electrochromic properties. The polymer was characterized by cyclic voltammetry, UV-Vis-NIR spectroscopy and colorimetry. Spectroelectrochemistry analysis demonstrated that the polymer can undergo both p-type and n-type doping processes. The polymer has four accessible color states. Further kinetic studies demonstrated that the polymer revealed high contrast ratio (75%), fast response time (0.9 s), excellent stability and color persistence. A dual-polymer electrochromic device was constructed in sandwich configuration where PolyBCO was used as the anodically coloring material. The device switches between a transmissive light gray state and a blue-colored state with a fast response time and high stability. (C) 2015 Elsevier B.V. All rights reserved.