Ambipolar operation of fullerene field-effect transistors by semiconductor/metal interface modification

Takao Nishikawa, Shin Ichiro Kobayashi, Tomoyuki Nakanowatari, Tadaoki Mitani, Tatsuya Shimoda, Yoshihiro Kubozono, Gakushi Yamamoto, Hisao Ishii, Michio Niwano, Yoshihiro Iwasa

    Research output: Contribution to journalArticlepeer-review

    55 Citations (Scopus)

    Abstract

    We report an ambipolar operation in field-effect transistors of C60 and metallofullerene Dy@ C82 by modification of semiconductor/metal electrode interface with perfluoroalkylsilane (FAS) molecules. Kelvin probe experiments revealed that the work function of the gold surface modified with FAS molecules increased by 0.55 eV as compared to the untreated gold. Hole injection into fullerenes is qualitatively understood in terms of this work-function change induced by the FAS molecules. The present results indicate that the charge injection from electrodes to organic semiconductors can be controlled simply by modification of semiconductor/metal interface without changing materials themselves.

    Original languageEnglish
    Article number104509
    JournalJournal of Applied Physics
    Volume97
    Issue number10
    DOIs
    Publication statusPublished - May 15 2005

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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