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Lookup NU author(s): Dr Ross Harrington,
Emeritus Professor Bill Clegg
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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.
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
Print publication date: 01/01/2011
ISSN (print): 0959-9428
ISSN (electronic): 1364-5501
Publisher: Royal Society of Chemistry
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