A structural investigation of novel thiophene-functionalized BEDT-TTF donors for application as organic field-effect transistors

Wang, Q., Wallis, J.D. ORCID: 0000-0001-7259-8783, Wu, Y. and Pilkington, M., 2014. A structural investigation of novel thiophene-functionalized BEDT-TTF donors for application as organic field-effect transistors. CrystEngComm, 16 (44), pp. 10235-10244. ISSN 1466-8033

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Abstract

Three new unsymmetrical thiophene-functionalized bisIJethylenedithio)tetrathiafulvalene (BEDT-TTF) donors (1–3) have been synthesized, characterised and examined as semiconducting materials for organic field-effect transistor (OFET) devices. The X-ray crystal structures of (1) and (2) reveal both neutral donors pack as dimers with lateral S⋯S contacts. For (1) the molecules are co-facially stacked in a head-to-tail manner with some degree of latitudinal slippage. A device prepared from a crystalline thin film of (1) deposited on unmodified silicon wafer substrate displays a mobility of 5.9 × 10−3 cm2 V−1 s−1 with an on/off ratio of 11. The shorter CH2 linker in (2) results in poorer orbital overlap, likely due to significant longitudinal and latitudinal slippage between molecules in the crystal lattice. As a consequence, no field-effect response was observed for the device fabricated from (2).

Item Type: Journal article
Publication Title: CrystEngComm
Creators: Wang, Q., Wallis, J.D., Wu, Y. and Pilkington, M.
Publisher: Royal Society of Chemistry
Date: 2014
Volume: 16
Number: 44
ISSN: 1466-8033
Identifiers:
NumberType
10.1039/C4CE01686FDOI
Rights: © Royal Society of Chemistry 2014
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 09:40
Last Modified: 09 Jun 2017 13:08
URI: http://irep.ntu.ac.uk/id/eprint/960

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