Cathodoluminescence of phosphorus doped (111) homoepitaxial diamond thin films

K. Tanabe, K. Nakazawa, J. Susantyo, Hiroshi Kawarada, S. Koizumi

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    A homoepitaxial diamond film with a thickness of approximately 1 μm was grown on the (111) surface of a type Ib diamond substrate with dopant concentration (PH3/CH4) of 500 ppm. Bound exciton recombination radiation due to the neutral donors has been observed in the peaks at 5.18 and 5.32 eV. The dominant peak at 5.18 eV is associated with one TO phonon. The peak at 5.32 eV is the radiation without phonon emission due to the localization of donors. This appearance of non-phonon emission is one of the important evidences to prove the two peaks at 5.18 and 5.32 eV to be the recombination radiation of bound exciton due to the donor. The binding energy of the free exciton to the donors, which is deduced from the energy difference between free and bound exciton, is 90 meV.

    Original languageEnglish
    Pages (from-to)1652-1654
    Number of pages3
    JournalDiamond and Related Materials
    Issue number9-10
    Publication statusPublished - 2001 Sep



    • Cathodoluminescence
    • Diamond
    • Phosphorus

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

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