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

18 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

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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