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

Lookup NU author(s): Dr Ross Harrington, Emeritus Professor Bill CleggORCiD

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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 x 10(-3) cm(2) V-1 s(-1), with an on/off ratio of 10(4)-10(5) and a threshold voltage of -42 V. The morphological and self-assembly characteristics versus electronic properties are discussed for future improvement of OFET devices.

Publication metadata

Author(s): McEntee GJ, Vilela F, Skabara PJ, Anthopoulos TD, Labram JG, Tierney S, Harrington RW, Clegg W

Publication type: Article

Publication status: Published

Journal: Journal of Materials Chemistry

Year: 2011

Volume: 21

Issue: 7

Pages: 2091-2097

Print publication date: 01/01/2011

ISSN (print): 0959-9428

ISSN (electronic): 1364-5501

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/c0jm02607g

DOI: 10.1039/c0jm02607g

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