Crystal Engineering of Dibenzothiophenothieno[3,2- b]thiophene (DBTTT) Isomers for Organic Field-Effect Transistors

  • Hung Yang Chen
  • , Guillaume Schweicher
  • , Miquel Planells
  • , Sean M. Ryno
  • , Katharina Broch
  • , Andrew J.P. White
  • , Dimitrios Simatos
  • , Mark Little
  • , Cameron Jellett
  • , Samuel J. Cryer
  • , Adam Marks
  • , Michael Hurhangee
  • , Jean Luc Brédas
  • , Henning Sirringhaus
  • , Iain McCulloch

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Three thiophene ring-terminated benzothieno[3,2-b]benzothiophene (BTBT) derivatives, C-C6-DBTTT, C-C12-DBTTT, and L-C12-DBTTT, were designed and synthesized, differing in the isomerization of alkyl chain position as well as aromatic core construction. A study of crystal structure and electronic properties combined with a theoretical investigation was performed to understand the structure-property relationships for the application of these molecules in organic field-effect transistors (OFETs). Different crystal packing structures were observed for these three isomers by single-crystal X-ray diffraction as a result of a crystal engineering molecular design approach. The highest charge-carrier mobility was observed for the isomer with a collinear core, L-C12-DBTTT. Preliminary results demonstrated a promising hole mobility of 2.44 cm2 V-1 s-1, despite the polymorphism observed in ambient conditions.

Original languageEnglish (US)
Pages (from-to)7587-7592
Number of pages6
JournalChemistry of Materials
Volume30
Issue number21
DOIs
StatePublished - Nov 13 2018
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry

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