Electrochromic properties and electrochromic device application of copolymer of N-(4-(3-thienyl methylene)-oxycarbonylphenyl)maleimide with thiophene

Ak M., Camurlu P., Yilmaz F., Cianga L., Yagci Y., Toppare L.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.102, no.5, pp.4500-4505, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 102 Issue: 5
  • Publication Date: 2006
  • Doi Number: 10.1002/app.24834
  • Journal Name: JOURNAL OF APPLIED POLYMER SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4500-4505
  • Keywords: electrochemical polymerization, conducting copolymers, electrochromic devices
  • Middle East Technical University Affiliated: Yes

Abstract

A new copolymer of N-(4-(3-thienyl methylene)-oxycarbonylphenyl)maleimide (MBThi) with thiophene [P(MBThi-co-Th)] was synthesized electrochemically in the presence of tetrabutylammonium tetrafluoroborate as the supporting electrolyte, in acetonitrile/borontrifluoride ethylether solvent mixture (80 : 20, v/v). Spectroelectrochemical analysis of the resulting copolymer reflected electronic transitions at 440, 730, and similar to 1000 nm, revealing pi-pi* transition, polaron, and bipolaron band formation, respectively. Switching ability was evaluated by a kinetic study via measuring the transmittance (%T) at the maximum contrast. Dual-type polymer electrochromic devices (ECDs) based on P(MBThi-co-Th) and poly(ethylene dioxythiophene) (PEDOT) were constructed. Spectroelectrochemistry, switching ability, and stability of the devices were investigated by UV-vis spectroscopy and cyclic voltammetry. These devices exhibit low switching voltages (between 0.0 and +2.0 V) and short switching times with reasonable switching stability under atmospheric conditions. (c) 2006 Wiley Periodicals, Inc.