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

Gary Conboy, Rupert G. D. Taylor, Neil J. Findlay, Alexander L. Kanibolotsky, Anto R. Inigo, Sanjay S. Ghosh, Bernd Ebenhoch, Lethy Krishnan Jagadamma, Gopala Krishna V. V. Thalluri, Muhammad T. Sajjad, Ifor D. W. Samuel, Peter J. Skabara

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

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.
Original languageEnglish (US)
Pages (from-to)11927-11936
Number of pages10
JournalJOURNAL OF MATERIALS CHEMISTRY C
Volume5
Issue number45
DOIs
StatePublished - Nov 13 2017
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-03
Acknowledgements: We are grateful to the EPSRC for funding through grants EP/H004157/1, EP/L012294/1, EP/L017008/1 and EP/L012200/1 and to the European Research Council for funding from Grant 321305. We are grateful to the research groups of Prof. Iain McCulloch (ICL/KAUST) and Prof. Neil McKeown (Edinburgh) for generously performing GPC measurements on the polymers. PJS and IDWS are Royal Society Wolfson Research Merit Award holders. Sanjay Ghosh thanks North Maharashtra University, India, for providing study leave to do post-doctoral research at the University of St Andrews, UK. Supporting data are accessible from 10.15129/9b457e8c-12bc-4a3a-9af3-7f53474f4e5c.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • General Chemistry
  • Materials Chemistry

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