Microstructure-mobility correlation in self-organised, conjugated polymer field-effect transistors

H. Sirringhaus, P.J. Brown, R.H. Friend, Martin Meedom Nielsen, Klaus Bechgaard, B.M.W. Langeveld-Voss, A.J.H. Spiering, R.A.J. Janssen, E.W. Meijer

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We have investigated the correlation between polymer microstructure and charge carrier mobility in high-mobility, self-organised field-effect transistors of poly-3-hexyl-thiophene (P3HT). Two different preferential orientations of the microcrystalline P3HT domains with respect to the substrate have been identified by X-ray diffraction, for which charge carrier mobilities differ by a factor > 100. High mobilities of 0.1 cm(2)/V s reflect efficient interchain transport along the direction of pi-pi stacking. The results provide a firm basis for exploring supramolecular self-organisation to enhance the charge transport properties of conjugated polymer field-effect devices. (C) 2000 Elsevier Science S.A. All rights reserved.
Original languageEnglish
JournalSynthetic Metals
Volume111-112
Pages (from-to)129-132
ISSN0379-6779
DOIs
Publication statusPublished - 2000

Keywords

  • Solution processing
  • Self-organization
  • Polythiophene
  • Field-effect transistors

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