High mobility n-channel organic field-effect transistors based on soluble C-60 and C-70 fullerene derivatives

Paul H. Woebkenberg, Donal D. C. Bradley, David Kronholm, Jan C. Hummelen, Dago M. de Leeuw, Michael Coelle, Thomas D. Anthopoulos*, Paul H. Wobkenberg, Michael Colle

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We report on n-channel organic field-effect transistors (OFETs) based on the solution processable methanofullerenes [6,6]-phenyl-C-61-butyric acid ester ([60]PCBM) and [6,6]-phenyl-C-71-butyric acid methyl ester (170]PCBM). Despite the fact that both derivatives form glassy films when processed from their electron mobilities are high and on the order of 0.21 cm(2/)V s and 0.1 cm(2)/V s, for [60]PCBM solution, and [70]PCBM, respectively. Although the derived mobility of [60]PCBM is comparable to the best values reported in the literature, the electron mobility of [70]PCBM is the highest value reported to date for any C-70 based molecule. We note that this is the only report in which C-60 and Cd-70 methanofullerenes exhibit comparable electron mobilities. The present findings could have significant implications in the area of large-area organic electronics and organic photovoltaics where C-60 derivatives have so far been the most widely used electron acceptor materials. (C) 2008 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)468-472
Number of pages5
JournalSynthetic Metals
Volume158
Issue number11
DOIs
Publication statusPublished - Jul-2008

Keywords

  • organic transistors
  • methanofullerenes
  • fullerene derivatives
  • n-channel
  • electron transport
  • THIN-FILM TRANSISTORS
  • POLYMER SOLAR-CELLS
  • COMPLEMENTARY CIRCUITS
  • SEMICONDUCTORS
  • METHANOFULLERENE
  • EFFICIENT
  • DESIGN

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