Deep-ultraviolet light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films

Shinya Ohmagari, Tsuyoshi Yoshitake

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    Deep-ultraviolet (DUV) light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite (UNCD/a-C:H) films prepared by pulsed laser deposition was investigated. The photocurrent spectra revealed that the UNCD/a-C:H films possess strong responses in the wavelength range between 210 and 280 nm, which might originate from UNCD grains. The heterojunction photodiodes comprised of p-type UNCD/a-C:H and n-type Si exhibited an obvious photovoltaic action for 254nm DUV light illumination. The external quantum efficiency and responsivity of the photodiodes were estimated to be 71% and 130mA/W, respectively. It was proved that UNCD/a-C:H is a new promising material applicable to DUV photodetectors.

    Original languageEnglish
    Article number065202
    JournalApplied Physics Express
    Volume5
    Issue number6
    DOIs
    Publication statusPublished - Jun 2012

    Fingerprint

    Carbon films
    Amorphous carbon
    Composite films
    Photodiodes
    ultraviolet radiation
    photodiodes
    Diamonds
    diamonds
    composite materials
    carbon
    Pulsed laser deposition
    Photodetectors
    Photocurrents
    Quantum efficiency
    pulsed laser deposition
    photocurrents
    photometers
    Heterojunctions
    heterojunctions
    quantum efficiency

    All Science Journal Classification (ASJC) codes

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

    Cite this

    Deep-ultraviolet light detection of p-type ultrananocrystalline diamond/hydrogenated amorphous carbon composite films. / Ohmagari, Shinya; Yoshitake, Tsuyoshi.

    In: Applied Physics Express, Vol. 5, No. 6, 065202, 06.2012.

    Research output: Contribution to journalArticle

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