Near-infrared photodetection in n-type nanocrystalline FeSi 2/p-type Si heterojunctions

Nathaporn Promros, Li Chen, Tsuyoshi Yoshitake

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    n-Type nanocrystalline (NC) FeSi2/p-type Si heterojunctions, which were prepared by pulsed laser deposition, were evaluated as a near infrared photodiode. The built-in potential was estimated to be approximately 1.1 eV from the capacitance-voltage measurement. These junctions showed a rectifying behavior accompanied by a large leakage current. The near infrared light detection performance was evaluated using a 1.33 μm laser in the temperature range of 77-300 K. At a reverse bias of -5 V, the detectivity was 5.5 × 107 cm Hz1/2 W-1 at 300 K and it was dramatically enhanced to be 8.0 × 1010 cm Hz1/2 W-1 at 77 K. It was demonstrated that NC-FeSi2 is a new potential material applicable to NIR photodetectors operating at low temperatures.

    Original languageEnglish
    Pages (from-to)3577-3581
    Number of pages5
    JournalJournal of Nanoscience and Nanotechnology
    Volume13
    Issue number5
    DOIs
    Publication statusPublished - May 2013

    Fingerprint

    Heterojunctions
    heterojunctions
    Lasers
    Infrared radiation
    Temperature
    Capacitance measurement
    Voltage measurement
    Pulsed laser deposition
    Photodetectors
    Photodiodes
    Leakage currents
    electrical measurement
    pulsed laser deposition
    photodiodes
    photometers
    leakage
    capacitance
    Light
    lasers
    temperature

    All Science Journal Classification (ASJC) codes

    • Bioengineering
    • Chemistry(all)
    • Biomedical Engineering
    • Materials Science(all)
    • Condensed Matter Physics

    Cite this

    Near-infrared photodetection in n-type nanocrystalline FeSi 2/p-type Si heterojunctions. / Promros, Nathaporn; Chen, Li; Yoshitake, Tsuyoshi.

    In: Journal of Nanoscience and Nanotechnology, Vol. 13, No. 5, 05.2013, p. 3577-3581.

    Research output: Contribution to journalArticle

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