Polyterthiophenes incorporating 3,4-difluorothiophene units: application in organic field-effect transistors

David J. Crouch, David Sparrowe, Martin Heeney, Iain McCulloch, Peter Skabara

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Abstract

Two terthiophenes bearing core fluorinated thienyl units have been synthesised as potential semiconductor materials for organic field-effect transistors. Polymerisation of these compounds has been achieved using conventional iron(III) chloride oxidative coupling methods and by electrochemical oxidation. Characterisation of the fluorinated materials has been achieved by absorption spectroscopy and cyclic voltammetry. A soluble hexyl-functionalised polymer (poly8b) was used in an OFET device; hole mobilities were measured up to 3 × 10−3 cm2 · V−1 · s−1, and the device had an on/off ratio of 105 and a turn-on voltage of +4 V.
Original languageEnglish
Pages (from-to)2642-2648
Number of pages7
JournalMacromolecular Chemistry and Physics
Volume211
Issue number24
Early online date15 Nov 2010
DOIs
Publication statusPublished - 15 Dec 2010

Keywords

  • conjugated polymers
  • polythiophene
  • field-effect transistors
  • electrochemistry
  • fluorine

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