Issue 45, 2017

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

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

Supplementary files

Article information

Article type
Paper
Submitted
30 Aug 2017
Accepted
15 Oct 2017
First published
13 Nov 2017
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2017,5, 11927-11936

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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