Synthesis and characterisation of liquid crystal molecules based on thieno [3,2-b] thiophene and their application in organic field-effect transistors

Wei Lung Liau, Yi Jen Su, Hsiao Fan Tseng, Jiun-Tai Chen*, Chain-Shu Hsu

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

A thieno [3,2-b] thiophene-based planar liquid crystal molecule, C12-PTTT, which possesses the characteristics of an organic field-effect transistor (OFET), was synthesised and its mesomorphic properties were studied by polarising optical microscopy and differential scanning calorimetry. A wide temperature range for a highly oriented smectic phase was observed. OFET devices made under various conditions, such as self-assembled monolayer treatment and alignment treatment, and with micro-channel structures, were fabricated to measure the electrical properties. Among different OFET device conditions, the best electric carrier mobility for C12-PTTT was 0.038 cm2 V−1s−1.

Original languageEnglish
Pages (from-to)557-565
Number of pages9
JournalLiquid Crystals
Volume44
Issue number3
DOIs
StatePublished - 19 Feb 2017

Keywords

  • Alignment layers
  • field-effect
  • liquid crystals
  • self-assembled monolayers
  • smectic
  • transistors

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