Molecular orientation and field-effect transistors of a rigid rod conjugated polymer thin films

Huanli Dong, Hongxiang Li, Erjing Wang, Shouke Yan, Jianming Zhang, Chunming Yang, Isao Takahashi, Hiroshi Nakashima, Keiichi Torimitsu, Wenping Hu

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Molecular orientation in thin films of a rigid rod conjugated polymer, a derivative of poly(para-phenylene ethynylene)s with linear side chains and thioacetyl end groups, was investigated by reflection-absorption infrared spectroscopy and X-ray diffraction technique. The results indicated that TA-PPE molecules tended to align with their backbone planes perpendicular to substrates, that is, with an "edge-on" molecular orientation in the films. Such molecular orientation is favorable for the efficient carrier transport in two-dimensional direction in the polymer films (i.e., via both the intrachain and interchain), so that high performance organic field-effect transistors were fabricated with hole mobility at around ̃4.3 × 10-3 cm2/Vs.

Original languageEnglish
Pages (from-to)4176-4180
Number of pages5
JournalJournal of Physical Chemistry B
Volume113
Issue number13
DOIs
Publication statusPublished - 2009 Apr 2
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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  • Cite this

    Dong, H., Li, H., Wang, E., Yan, S., Zhang, J., Yang, C., Takahashi, I., Nakashima, H., Torimitsu, K., & Hu, W. (2009). Molecular orientation and field-effect transistors of a rigid rod conjugated polymer thin films. Journal of Physical Chemistry B, 113(13), 4176-4180. https://doi.org/10.1021/jp811374h