Vinylene-Linked Oligothiophene-Difluorobenzothiadiazole Copolymer for Transistor Applications

Abby Casey, Yang Han, Eliot Gann, Joshua P. Green, Christopher R. McNeill, Thomas Anthopoulos, Martin Heeney*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The synthesis of the novel donor-acceptor monomer 4,7-bis[(E)-2-(5-bromo-3-dodecylylthiophen-2-yl)ethenyl]-5,6-difluoro-2,1,3-benzothiadiazole (FBT-V2T2) is reported. Polymerization with 4,4′-ditetradecyl-5,5′-bistrimethylstannyl-2,2′-bithiophene afforded a highly crystalline polymer that aggregated strongly in solution. Polymer films were well ordered resulting in high performance field-effect transistors with low onset voltages, negligible hysteresis, high channel current on/off ratios, and peak hole mobilities of up to 0.5 cm2 V-1 s-1. Notably the transistors exhibited close to ideal behavior with extracted mobilities almost independent of gate of voltage.

Original languageEnglish (US)
Pages (from-to)31154-31165
Number of pages12
JournalACS Applied Materials and Interfaces
Volume8
Issue number45
DOIs
StatePublished - Nov 16 2016

Keywords

  • conjugated polymers
  • donor-acceptor copolymer
  • field-effect transistor
  • fluorination
  • organic semiconductors

ASJC Scopus subject areas

  • Materials Science(all)

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