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

McEntee, G. J., Vilela, F., Skabara, P. J. , Anthopoulos, T. D., Labram, J. G., Tierney, S., Harrington, R. W. and Clegg, W. (2011) Self-assembly and charge transport properties of a benzobisthiazole end-capped with dihexyl thienothiophene units. Journal of Materials Chemistry, 21(7), pp. 2091-2097. (doi: 10.1039/C0JM02607G)

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−1s−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.

• Item Type: Articles
• Additional Information: FV and JGL thank the EPSRC for funding (EP/E02741 and EP/ F056389/1). WC and RWH thank EPSRC for funding the National Crystallography Service.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Skabara, Professor Peter
• Authors: McEntee, G. J., Vilela, F., Skabara, P. J., Anthopoulos, T. D., Labram, J. G., Tierney, S., Harrington, R. W., and Clegg, W.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Journal of Materials Chemistry
• Publisher: Royal Society of Chemistry
• ISSN: 0959-9428
• ISSN (Online): 1364-5501
• Published Online: 08 November 2010