Electrical properties of reactive liquid crystal semiconductors

Iain Mcculloch*, Michael Coelle, Kristijonas Genevicius, Rick Hamilton, Michael Heckmeier, Martin Heeney, Theo Kreouzis, Maxim Shkunov, Weimin Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Fabrication of display products by low cost printing technologies such as ink jet, gravure offset lithography and flexography requires solution processable semiconductors for the backplane electronics. The products will typically be of lower performance than polysilicon transistors, but comparable to amorphous silicon. A range of prototypes are under development, including rollable electrophoretic displays, active matrix liquid crystal displays (AMLCD's), and flexible organic lightemitting diode (OLED) displays. Organic semiconductors that offer both electrical performance and stability with respect to storage and operation under ambient conditions are required. This work describes the initial evaluation of reactive mesogen semiconductors, which can polymerise within mesophase temperatures, "freezing in" the order in crosslinked domains. These crosslinked domains offer mechanical stability and are inert to solvent exposure in further processing steps. Reactive mesogens containing conjugated aromatic cores, designed to facilitate charge transport and provide good oxidative stability, were prepared and their liquid crystalline properties evaluated. Both time-of-flight and field effect transistor devices were prepared and their electrical characterisation reported.

Original languageEnglish (US)
Pages (from-to)488-491
Number of pages4
JournalJapanese Journal of Applied Physics
Volume47
Issue number1 PART 2
DOIs
StatePublished - Jan 22 2008
Externally publishedYes

Keywords

  • Charge carrier mobility
  • Field-effect transistor
  • Liquid crystal
  • Organic semiconductor
  • Photopolymerisation
  • Time of flight

ASJC Scopus subject areas

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

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