In situ spectroelectrochemical study of positively and negatively charged states in a donor/acceptor EDOT/benzotriazole-based polymer

Beatriz Meana-Esteban*, Abidin Balan, Derya Baran, Helmut Neugebauer, Levent Toppare, Niyazi Serdar Sariciftci

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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. cPBEBT is a D-A-type polymer consisting of EDOT/benzotriazole/EDOT building blocks. It can be p- and n-doped reversibly, as shown by different in situ spectroelectrochemical techniques. There are only a few materials that can be reversibly both p- and n-doped, which is a very interesting property and makes cPBEBT very attractive for optoelectronic applications.

Original languageEnglish (US)
Pages (from-to)2459-2466
Number of pages8
JournalMacromolecular Chemistry and Physics
Volume212
Issue number22
DOIs
StatePublished - Nov 15 2011
Externally publishedYes

Keywords

  • charge transport
  • conjugated polymers
  • donor/acceptor systems
  • electrochemical bandgap
  • in situ spectroelectrochemistry

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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