Structurally tailored thiophene-based hybrid materials for thin-film and single-crystal transistors: Synthesis, photophysics and carrier-transport properties

Ye Xin Li, Xu Tang Tao, Fa Jun Wang, Tao He, Min Hua Jiang

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The structures, optical properties, thin-film and single-crystal field-effect transistor performance of three thiophene-based hybrid materials, 5-(9-butyl-3-carbazolyl)terthiophene (BCTT), 2,5-bis(9-butyl-3-carbazolyl)thiophene (BBCT) and 2-(9-butyl-3-carbazolyl)-5-(2-dibenzothienyl)thiophene (BCDT), are reported. The structural modifications at one side of thiophene have significant effects on the intermolecular interaction, morphology and carrier-transport properties. The adjacent molecules in the solid state of BCTT adopt H aggregation, while compounds BBCT and BCDT both exhibit the formation of J aggregation. In BCTT, the crystal structure features a herringbone motif. The hole mobility for the single-crystal field-effect transistor based on BCTT reaches 0.094 cm2 V-1 s-1, which is much higher than those of BBCT and BCDT. This study reveals that the enhanced rigidity in the molecules of BBCT and BCDT is not favorable to carrier transport.

Original languageEnglish (US)
Pages (from-to)910-917
Number of pages8
JournalOrganic Electronics
Volume10
Issue number5
DOIs
StatePublished - Aug 2009

Keywords

  • Hybrid materials
  • Morphology
  • Single-crystal field-effect transistor

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