Carrier transport properties of monodisperse glassy-nematic oligofluorenes in organic field-effect transistors

Takeshi Yasuda, Katsuhiko Fujita, Tetsuo Tsutsui, Yanhou Geng, Sean W. Culligan, Shaw H. Chen

Research output: Contribution to journalArticle

110 Citations (Scopus)

Abstract

A heptafluorene, F(Pr)5F(MB)2, a dodecafluorene, F(MB)10F(EH)2, and poly(9,9′-dioctylfluorene), PFO, were used to prepare field-effect transistors. Monodomain and polydomain glassy-nematic films as well as glassy-amorphous films were prepared for the measurement of hole mobility. In a monodomain film, the μ value is determined by the chain length in oligofluorene and the persistence length in polyfluorene. Mobility in a polydomain film lies between μ and μ of a monodomain film. Amorphous films possess the lowest mobility of all presumably because of the geometric and energetic disorder. The OFET containing a monodomain glassy-nematic film of F(MB) 10F(EH)2 exhibits a field-effect mobility of 0.012 cm2/Vs with an on/off current ratio of 1.0 × 104, a substantial improvement over a monodomain glassy-nematic film of PFO.

Original languageEnglish
Pages (from-to)264-268
Number of pages5
JournalChemistry of Materials
Volume17
Issue number2
DOIs
Publication statusPublished - Jan 25 2005

Fingerprint

Organic field effect transistors
Carrier transport
Transport properties
Amorphous films
Hole mobility
Field effect transistors
Chain length

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Carrier transport properties of monodisperse glassy-nematic oligofluorenes in organic field-effect transistors. / Yasuda, Takeshi; Fujita, Katsuhiko; Tsutsui, Tetsuo; Geng, Yanhou; Culligan, Sean W.; Chen, Shaw H.

In: Chemistry of Materials, Vol. 17, No. 2, 25.01.2005, p. 264-268.

Research output: Contribution to journalArticle

Yasuda, Takeshi ; Fujita, Katsuhiko ; Tsutsui, Tetsuo ; Geng, Yanhou ; Culligan, Sean W. ; Chen, Shaw H. / Carrier transport properties of monodisperse glassy-nematic oligofluorenes in organic field-effect transistors. In: Chemistry of Materials. 2005 ; Vol. 17, No. 2. pp. 264-268.
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