Optoelectrochemical properties of the copolymer of 2,5-di(4-methylthiophen-2-yl)-1-(4-nitrophenyl)-1H-pyrrole monomer with 3,4-ethylenedioxythiophene

AK M., Tanyeli C., Akhmedo D. M., Toppare L.

THIN SOLID FILMS, vol.516, no.12, pp.4334-4341, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 516 Issue: 12
  • Publication Date: 2008
  • Doi Number: 10.1016/j.tsf.2008.01.013
  • Journal Name: THIN SOLID FILMS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4334-4341
  • Keywords: conducting polymers, electro-optical effects, thin films, copolymerization, spectroelectrochemistry, SOLUBLE CONDUCTING POLYMER, INFRARED ELECTROCHROMISM, WINDOWS
  • Middle East Technical University Affiliated: Yes

Abstract

Copolymer of 2,5-di(4-methylthiophen-2-yl)-1-(4-nitrophenyl)-1H-pyrrole (MTNP) with 3,4-ethylene dioxythiophene (EDOT) was electro-chemically synthesized and characterized via cyclic voltammetry, Fourier Transform Infrared spectroscopy, Scanning Electron Microscopy, conductivity measurements. Spectroelectrochemical investigations showed that resulting copolymer film has distinct electrochromic properties. It has five different colors (dark purple, red, light grey, green, blue). At the neutral state m due to the pi-pi* transition was found to be 500 mn and E-g was calculated as 1.71 eV Double potential step chronoamperometry experiment shows that copolymer film has good stability, fast switching time (1.1 s) and high optical contrast (30%).