In Situ Spectroelectrochemical Study of Positively and Negatively Charged States in a Donor/Acceptor EDOT/Benzotriazole-Based Polymer

Meana-Esteban B., Balan A., Baran D., Neugebauer H., Toppare L., Sariciftci N. S.

MACROMOLECULAR CHEMISTRY AND PHYSICS, vol.212, no.22, pp.2459-2466, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 212 Issue: 22
  • Publication Date: 2011
  • Doi Number: 10.1002/macp.201100322
  • Journal Name: MACROMOLECULAR CHEMISTRY AND PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2459-2466
  • Middle East Technical University Affiliated: Yes

Abstract

Positively and negatively charged states in cPBEBT, which consists of EDOT/benzotriazole/EDOT as the building block, are studied using CV, in situ UV-Vis, and FTIR-ATR spectroscopy. The results show that cPBEBT is an ambipolar D-A-type polymer capable of conducting both holes and electrons. The injected positive and negative charges are distributed over the whole polymer backbone, which is proven by in situ FTIR-ATR where spectral signatures associated with the benzotriazole unit are observed in both p- and n-doped cPBEBT. HOMO and LUMO values obtained from CV and FTIR-ATR experiments during oxidation and reduction are compared. cPBEBT is an example of the D-A approach towards the improvement of the electronic properties of the resultant polymer.