Fused H-shaped tetrathiafulvalene–oligothiophenes as charge transport materials for OFETs and OPVs

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Wright, Iain A. and Findlay, Neil J. and Arumugam, Sasikumar and Inigo, Anto R. and Kanibolotsky, Alexander L. and Zassowski, Pawel and Domagała, Wojciech and Skabara, Peter J. (2014) Fused H-shaped tetrathiafulvalene–oligothiophenes as charge transport materials for OFETs and OPVs. Journal of Materials Chemistry. C, 2 (15). pp. 2674-2683. ISSN 2050-7534 (https://doi.org/10.1039/c3tc32571g)

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Abstract

A series of hybrid tetrathiafulvalene-oligothiophene compounds has been synthesised, where the tetrathiafulvalene unit is fused at each side to an end-capped oligothiophene chain of varying length (terthiophene, quinquithiophene and septithiophene). Each hybrid structure (1-3) has been studied by cyclic voltammetry and triple EPR-UV-Vis-NIR spectroelectrochemistry in the case of the quinquithiophene compound (2). Comparison is made with the corresponding half-units, which lack the fulvalene core and contain just one oligothiophene chain. The highest hole mobility of quinquithiophene-TTF 2 was obtained from field effect transistors (8.61 × 10-3 cm 2 V-1 s-1); its surface morphology was characterised by tapping mode atomic force microscopy and a power conversion of 2.5% was achieved from a bulk heterojunction organic solar cell device using PC71BM as the acceptor.

ORCID iDs

Wright, Iain A., Findlay, Neil J. ORCID logoORCID: https://orcid.org/0000-0002-1417-3311, Arumugam, Sasikumar, Inigo, Anto R., Kanibolotsky, Alexander L. ORCID logoORCID: https://orcid.org/0000-0003-3991-6297, Zassowski, Pawel, Domagała, Wojciech and Skabara, Peter J.;
CORE (COnnecting REpositories)