New liquid crystalline solution processable organic semiconductors and their performance in field effect transistors

Maxim Shkunov*, Weimin Zhang, David Graham, David Sparrowe, Martin Heeney, Mark Giles, Steve Tierney, Clare Bailey, Iain McCulloch, Theo Kreouzisi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

New polymerisable liquid crystalline organic semiconductors based on small molecule "reactive mesogens" are reported. These molecules, comprising π-conjugated cores with reactive endgroups, were designed, synthesised then solution processed into thin films. The mesogenic morphology was attained thermally and fixed through a post fabrication photopolymerisation reaction. Thermal, optical and electrical properties of these thin films were characterised to reveal details of morphology and molecular orientation. Both bulk (time-of-flight) and surface (field-effect) charge carrier mobilities were measured. The relationship between molecular structure, corresponding macrostructure processability and charge mobility is discussed. Fabrication and characterisation of field-effect transistors based on reactive mesogens are presented and discussed.

Original languageEnglish (US)
Pages (from-to)181-192
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5217
DOIs
StatePublished - 2003
Externally publishedYes

Keywords

  • Organic field-effect transistors
  • Organic semiconductors
  • Photopolymerisation
  • Reactive mesogens
  • Small conjugated molecules
  • Thermotropic liquid crystals
  • Time-of-flight technique

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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