Magnetic field effect on photoconductivity of single-crystalline pentacene and perfluoropentacene field-effect transistors

Song Toan Pham, Yoshitaka Kawasugi, Hirokazu Tada

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Organic magnetoresistance (OMAR) of single-crystalline (SC) pentacene (C22H14) and perfluoropentacene (C22F 14) was studied using field-effect transistor structures. The gate voltage effect showed that the OMAR originates from photo-induced current and requires both electrons and holes in the transport channel. The temperature dependence showed the maximum magnetoresistance (MR) ratio up to -6% under light irradiation at approximately 200 K and magnetic field of 80 mT. The charge carrier mobility and the exciton diffusion length were not important factors to determine the MR ratios. The interaction between triplet excitons and traps was thought to govern the OMAR behaviors.

    Original languageEnglish
    Title of host publicationCharge Generation/Transport in Organic Semiconductor Materials
    Pages95-99
    Number of pages5
    DOIs
    Publication statusPublished - 2011 Dec 1
    Event2011 MRS Fall Meeting - Boston, MA, United States
    Duration: 2011 Nov 282012 Dec 2

    Publication series

    NameMaterials Research Society Symposium Proceedings
    Volume1402
    ISSN (Print)0272-9172

    Other

    Other2011 MRS Fall Meeting
    CountryUnited States
    CityBoston, MA
    Period11/11/2812/12/2

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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  • Cite this

    Pham, S. T., Kawasugi, Y., & Tada, H. (2011). Magnetic field effect on photoconductivity of single-crystalline pentacene and perfluoropentacene field-effect transistors. In Charge Generation/Transport in Organic Semiconductor Materials (pp. 95-99). (Materials Research Society Symposium Proceedings; Vol. 1402). https://doi.org/10.1557/opl.2012.501