Optical transmission, photoluminescence, and Raman scattering of porous SiC prepared from p-type 6H SiC

Sangsig Kim, Jonathan E. Spanier, Irving P. Herman

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    53 Citations (Scopus)

    Abstract

    The optical transmission, temperature-dependence of the photoluminescence (PL), and Raman scattering of porous SiC prepared from p-type 6H-SiC are compared with those from bulk p-type 6H-SiC. While the transmission spectrum of bulk SiC at room temperature reveals a relatively sharp edge corresponding to its band gap at 3.03 eV, the transmission edge of porous SiC (PSC) is too wide to determine its band gap. It is believed that this wide edge might be due to surface states in PSC. At room temperature, the PL from PSC is 20 times stronger than that from bulk SiC. The PL PSC spectrum is essentially independent of temperature. The relative intensities of the Raman scattering peaks from PSC are largely independent of the polarization configuration, in contrast to those from bulk SiC, which suggests that the local order is fairly random.

    Original languageEnglish
    Pages (from-to)5875-5878
    Number of pages4
    JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
    Volume39
    Issue number10
    DOIs
    Publication statusPublished - 2000 Oct

    ASJC Scopus subject areas

    • General Engineering
    • General Physics and Astronomy

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