Microscopic characterization of printable low-voltage electrolyte-gated transistors by electron spin resonance

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

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    We have investigated the microscopic properties of printable low-voltage electrolyte-gated transistors using electron spin resonance (ESR). The utilized devices were ion gel-gated regioregular poly(3-hexylthiophene) (RR-P3HT) thin-film transistors. We performed simultaneous mesurements of field-induced ESR (FI-ESR) and device characteristics using the same device. Clear FI-ESR signals due to hole carriers (positive polarons) were observed by applying a negative gate voltage. The anisotropy of the ESR linewidth indicated two-dimensional magnetic interactions between high density charges. The magnetism of the majority of hole carriers at a high charge density was found to be nonmagnetic from the simultaneous measurements of FI-ESR and transfer characteristics. The anisotropy of the g value of the ESR signal at a high gate voltage indicated the disordered molecular orientation of RR-P3HT where paramagnetic holes exist. These results provide insight into the charge transport mechanism of RR-P3HT polymer semiconductors with high charge densities.

    Original languageEnglish
    Article number05DC05
    JournalJapanese Journal of Applied Physics
    Volume52
    Issue number5 PART 2
    DOIs
    Publication statusPublished - 2013 May

    Fingerprint

    low voltage
    Paramagnetic resonance
    electron paramagnetic resonance
    Transistors
    transistors
    Electrolytes
    electrolytes
    Electric potential
    Charge density
    anisotropy
    electric potential
    Anisotropy
    polarons
    Polarons
    Molecular orientation
    Magnetism
    gels
    Thin film transistors
    Linewidth
    Charge transfer

    ASJC Scopus subject areas

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

    Cite this

    Microscopic characterization of printable low-voltage electrolyte-gated transistors by electron spin resonance. / Marumoto, Kazuhiro; Tsuji, Masaki; Yomogida, Yohei; Takenobu, Taishi; Iwasa, Yoshihiro.

    In: Japanese Journal of Applied Physics, Vol. 52, No. 5 PART 2, 05DC05, 05.2013.

    Research output: Contribution to journalArticle

    Marumoto, Kazuhiro ; Tsuji, Masaki ; Yomogida, Yohei ; Takenobu, Taishi ; Iwasa, Yoshihiro. / Microscopic characterization of printable low-voltage electrolyte-gated transistors by electron spin resonance. In: Japanese Journal of Applied Physics. 2013 ; Vol. 52, No. 5 PART 2.
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