Effect of dipole moment on carrier transport in liquid crystalline phase

DOI
  • OHNO Akira
    Imaging Science and Engineering Laboratory, Tokyo Institute of Technology JST-CREST
  • NAKAMURA Tsukasa
    Imaging Science and Engineering Laboratory, Tokyo Institute of Technology
  • HANNA Jun-ichi
    Imaging Science and Engineering Laboratory, Tokyo Institute of Technology JST-CREST

Bibliographic Information

Other Title
  • 液晶相における電荷輸送に対するダイポールの効果

Abstract

We first investigated the dipolar-dopant effects on charge carrier transport properties in smectic mesophases as a function of the dopant concentration. In the present experiments, we used phenylnaphthalene derivative as a host material exhibiting smectic-LC phase and dipolar dopant molecules such as cyano-compunds and characterized the charge carrier transport properties in the mixture by time-of-flight experiments. Then, we analytically calculated the induced energetic disorder in a smectic-LC mesophases. Comparing the experimental results with calculation, we found that the concentration dependence of the energetic disorder is different from that in the isotropic mixture and reduced by LC molecular alignment. Additionally, the dipolar dopants do not induce the additional energetic disorder, if they are not located within smectic layers. This is a quite unique effect available for ordered organic semiconductors.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390282680664412160
  • NII Article ID
    130004589800
  • DOI
    10.11538/ekitou.2008.0.115.0
  • ISSN
    24325988
    18803490
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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