Orientation-controlled growth of pentacene single crystal films on an alignment layer using liquid crystal as solvent

Hideo Fujikake, Takaaki Suzuki, Fumito Isaka, Fumio Sato

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We found that organic semiconductor pentacene is soluble in some liquid crystal materials with large π-electron conjugated groups. The solubility of pentacene in the heated cyanoterphenyl liquid crystal reached 20wt%. We considered that both elongated molecular structures of pentacene and liquid crystal produce temporary molecular aggregates in the solution. We also clarified that a large molecular-alignment-controlled thin plate of single crystal pentacene up to 200 um in length can be grown on a rubbed alignment layer of polyimide when the heated solution film was slowly cooled between glass substrates.

Original languageEnglish
Pages (from-to)L536-L539
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume43
Issue number4 B
Publication statusPublished - 2004 Apr 15
Externally publishedYes

Keywords

  • Dichroic absorption
  • Liquid crystal solvent
  • Molecular-alignment control
  • Pentacene
  • Single crystal growth

ASJC Scopus subject areas

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

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