Acenaphtho[1,2-b]quinoxaline based low band gap copolymers for organic thin film transistor applications

Raja Bhaskar Kanth Siram, Jeremy Smith, Thomas Anthopoulos*, Satish Patil

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We report the synthesis of a novel class of low band gap copolymers based on an acenaphtho[1,2-b]quinoxaline core and oligothiophene derivatives acting as the acceptor and the donor moieties, respectively. The optical properties of the copolymers were characterized by ultraviolet-visible spectroscopy while the electrochemical properties were determined by cyclic voltammetry. The band gap of these polymers was found to be in the range 1.8-2.0 eV as calculated from the optical absorption band edge. X-ray diffraction measurements show weak π-π stacking interactions between the polymer chains. The hole mobility of the copolymers was evaluated using field-effect transistor measurements yielding values in the range 10 -5 -10 -3 cm 2 /Vs.

Original languageEnglish (US)
Pages (from-to)4450-4458
Number of pages9
JournalJournal of Materials Chemistry
Volume22
Issue number10
DOIs
StatePublished - Mar 14 2012

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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