Self-assembly and charge transport properties of a benzobisthiazole end-capped with dihexyl thienothiophene units

Greg J. McEntee, Filipe Vilela, Peter J. Skabara, Thomas Anthopoulos, John G. Labram, Steve Tierney, Ross W. Harrington, William Clegg

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The synthesis of a new conjugated material is reported; BDHTT-BBT features a central electron-deficient benzobisthiazole capped with two 3,6-dihexyl-thieno[3,2-b]thiophenes. Cyclic voltammetry was used to determine the HOMO (-5.7 eV) and LUMO (-2.9 eV) levels. The solid-state properties of the compound were investigated by X-ray diffraction on single-crystal and thin-film samples. OFETs were constructed with vacuum deposited films of BDHTT-BBT. The films displayed phase transitions over a range of temperatures and the morphology of the films affected the charge transport properties of the films. The maximum hole mobility observed from bottom-contact, top-gate devices was 3 × 10-3 cm2 V-1 s-1, with an on/off ratio of 104-105 and a threshold voltage of -42 V. The morphological and self-assembly characteristics versus electronic properties are discussed for future improvement of OFET devices.

Original languageEnglish (US)
Pages (from-to)2091-2097
Number of pages7
JournalJournal of Materials Chemistry
Volume21
Issue number7
DOIs
StatePublished - Feb 21 2011

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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