Liquid crystal semiconductors and their application in field effect transistors

Iain McCulloch*, Kristijonas Genevicius, Martin Heeney, Maxim Shkunov, Weimin Zhang, Theo Kreouzis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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, AMLCD's, (active matrix liquid crystal displays), and flexible OLED (organic light emitting diode) 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 development 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)104-107
Number of pages4
JournalSID Conference Record of the International Display Research Conference
StatePublished - 2006
Externally publishedYes

Keywords

  • Charge transport
  • Reactive mesogens
  • Semiconductors

ASJC Scopus subject areas

  • Engineering(all)

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