Liquid-crystalline semiconducting polymers with high charge-carrier mobility

Iain Mcculloch*, Martin Heeney, Clare Bailey, Kristijonas Genevicius, Iain MacDonald, Maxim Shkunov, David Sparrowe, Steve Tierney, Robert Wagner, Weimin Zhang, Michael L. Chabinyc, R. Joseph Kline, Michael D. McGehee, Michael F. Toney

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1837 Scopus citations

Abstract

Organic semiconductors that can be fabricated by simple processing techniques and possess excellent electrical performance, are key requirements in the progress of organic electronics. Both high semiconductor charge-carrier mobility, optimized through understanding and control of the semiconductor microstructure, and stability of the semiconductor to ambient electrochemical oxidative processes are required. We report on new semiconducting liquid-crystalline thieno[3,2-b ]thiophene polymers, the enhancement in charge-carrier mobility achieved through highly organized morphology from processing in the mesophase, and the effects of exposure to both ambient and low-humidity air on the performance of transistor devices. Relatively large crystalline domain sizes on the length scale of lithographically accessible channel lengths ( ∼ 200 nm) were exhibited in thin films, thus offering the potential for fabrication of single-crystal polymer transistors. Good transistor stability under static storage and operation in a low-humidity air environment was demonstrated, with charge-carrier field-effect mobilities of 0.2-0.6 cm 2 V-1 s-1 achieved under nitrogen.

Original languageEnglish (US)
Pages (from-to)328-333
Number of pages6
JournalNature Materials
Volume5
Issue number4
DOIs
StatePublished - Apr 16 2006

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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