Electron spin resonance study of organic interfaces in ion gel-gated rubrene single-crystal transistors

Yuki Takahashi, Masaki Tsuji, Yohei Yomogida, Taishi Takenobu, Yoshihiro Iwasa, Kazuhiro Marumoto

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    7 Citations (Scopus)

    Abstract

    Organic interfaces of rubrene single crystals (RSCs) in ion gel-gated electric double-layer transistors (EDLTs) were investigated by electron spin resonance (ESR). The EDLTs were fabricated by laminating ion-gel films onto RSCs. Clear ESR signals due to field-injected holes in RSCs were successfully observed at low gate voltages, showing a high spin concentration due to the high capacitance of EDLTs. The analyses of anisotropic ESR signals and its gate-voltage dependence show that the bulk molecular orientation at RSCs' interfaces is preserved without forming deep trapping levels, which demonstrate that organic interfaces in RSC-EDLTs are clean and undamaged under a strong electric field in EDLTs.

    Original languageEnglish
    Article number041603
    JournalApplied Physics Express
    Volume6
    Issue number4
    DOIs
    Publication statusPublished - 2013 Apr

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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