Electronic, redox and charge transport properties of an unusual hybrid structure: a bis(septithiophene) bridged by a fused tetrathiafulvalene (TTF)

Iain A. Wright, Peter J. Skabara, John C. Forgie, Alexander L. Kanibolotsky, Blanca Gonzalez, Simon J. Coles, Salvatore Gambino, Ifor D. W. Samuel

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

A hybrid tetrathiafulvalene-oligothiophene compound has been synthesised, in which the fulvalene unit is fused on both sides to an end-capped septithiophene oligomer. The compound (1) has been studied by cyclic voltammetry, UV-vis spectroelectrochemistry and X-ray crystallography. The properties of this material are compared to the half-unit (9), which lacks the TTF core and contains only one septithiophene chain. In the case of the larger molecule, there are multiple and complex redox processes leading to the loss of 6-8 electrons per molecule. Charge generation layer time-of-flight measurements give maximum hole mobilities of ca. 1 x 10(-5) cm(2) V-1 s(-1).

Original languageEnglish
Pages (from-to)1462-1469
Number of pages8
JournalJournal of Materials Chemistry
Volume21
Issue number5
DOIs
Publication statusPublished - 2011

Keywords

  • FIELD-EFFECT TRANSISTORS
  • ORGANIC SOLAR-CELLS
  • LOW-BAND-GAP
  • HIGH-MOBILITY
  • DITHIOPHENE-TETRATHIAFULVALENE
  • CONJUGATED ARCHITECTURES
  • MOLECULAR CONDUCTORS
  • UNIT
  • OLIGOTHIOPHENE
  • POLYTHIOPHENE

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