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, cilt.516, sa.12, ss.4334-4341, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 516 Konu: 12
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.tsf.2008.01.013
  • Dergi Adı: THIN SOLID FILMS
  • Sayfa Sayıları: ss.4334-4341

Özet

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%).