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Issue 45, 2017
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Novel 4,8-benzobisthiazole copolymers and their field-effect transistor and photovoltaic applications

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Abstract

A series of copolymers containing the benzo[1,2-d:4,5-d′]bis(thiazole) (BBT) unit has been designed and synthesised with bisthienyl-diketopyrrolopyrrole (DPP), dithienopyrrole (DTP), benzothiadiazole (BT), benzodithiophene (BDT) or 4,4′-dialkoxybithiazole (BTz) comonomers. The resulting polymers possess a conjugation pathway that is orthogonal to the more usual substitution pathway through the 2,6-positions of the BBT unit, facilitating intramolecular non-covalent interactions between strategically placed heteroatoms of neighbouring monomer units. Such interactions enable a control over the degree of planarity through altering their number and strength, in turn allowing for tuning of the band gap. The resulting 4,8-BBT materials gave enhanced mobility in p-type organic field-effect transistors of up to 2.16 × 10−2 cm2 V−1 s−1 for pDPP2ThBBT and good solar cell performance of up to 4.45% power conversion efficiency for pBT2ThBBT.

Graphical abstract: Novel 4,8-benzobisthiazole copolymers and their field-effect transistor and photovoltaic applications

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Publication details

The article was received on 30 Aug 2017, accepted on 15 Oct 2017 and first published on 13 Nov 2017


Article type: Paper
DOI: 10.1039/C7TC03959J
Citation: J. Mater. Chem. C, 2017,5, 11927-11936
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    Novel 4,8-benzobisthiazole copolymers and their field-effect transistor and photovoltaic applications

    G. Conboy, R. G. D. Taylor, N. J. Findlay, A. L. Kanibolotsky, A. R. Inigo, S. S. Ghosh, B. Ebenhoch, L. Krishnan Jagadamma, G. K. V. V. Thalluri, M. T. Sajjad, I. D. W. Samuel and P. J. Skabara, J. Mater. Chem. C, 2017, 5, 11927
    DOI: 10.1039/C7TC03959J

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