Transistor properties of novel organic conducting polymers bearing tetrathiafulvalene units in the backbone

Yoshiaki Kashimura, Touichiro Goto, Hiroshi Nakashima, Kazuaki Furukawa, Erjing Wang, Hongxiang Li, Wenping Hu, Keiichi Torimitsu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The organic field-effect transistor (OFET) properties of conducting polymers bearing a tetrathiafulvalene (TTF) unit in the backbone whose termini are capped with functional groups were investigated. The OFET devices were fabricated by a solution process under various fabrication conditions. All the devices showed typical p-type semiconducting behavior as expected from the electron-donating properties of TTF derivatives. Cast films exhibited higher field-effect mobilities than spin-coated films. Surface treatment with organic silane molecules produced no noticeable effects. When using thioacetyl-capped polymer, treatment of the OFET device in an ammonia atmosphere resulted in a field-effect mobility one order of magnitude higher than that of the pristine film. By contrast, there was no such enhancement with ethyl acetate-capped polymer. Atomic force microscopy observations revealed that the ammonia treatment promoted the ordering of the polymer chain, which resulted in improved electronic conduction.

Original languageEnglish
Article number01AB08
JournalJapanese journal of applied physics
Volume49
Issue number1 Part 2
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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