Excitonic recombination radiation in phosphorus-doped CVD diamonds

K. Nakazawa, K. Tanabe, M. Tachiki, Hiroshi Kawarada, S. Koizumi

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    Free-exciton and bound-exciton recombination radiations are observed reproducibly at different doping levels using cathodoluminescence in phosphorus-doped chemical-vapor-deposited (CVD) diamond thin films. The films are grown by microwave-plasma-assisted CVD, and are doped with phosphine during deposition. From the energy difference between free- and bound-exciton recombination radiations, the binding energy of free excitons to neutral donors is found to be 90 meV. The intensity of bound-exciton recombination radiation decreases as the temperature increases. On the other hand, the intensity of free-exciton recombination radiation increases apparently from 80 to 150 K in samples with phosphorus-carbon concentration ratios of 200, 500, and 1000 ppm. Using the rate equation for transfer processes among free and bound excitons, the radiative process with increasing temperature is explained. The dissociated bound excitons are directly transferred to free excitons with increasing temperature.

    Original languageEnglish
    Article number235203
    Pages (from-to)2352031-2352034
    Number of pages4
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume64
    Issue number23
    Publication statusPublished - 2001 Dec 15

    Fingerprint

    Diamond
    Excitons
    Phosphorus
    phosphorus
    Diamonds
    diamonds
    Vapors
    excitons
    vapors
    Radiation
    radiation
    phosphine
    LDS 751
    Cathodoluminescence
    Diamond films
    cathodoluminescence
    Binding energy
    phosphines
    Temperature
    temperature

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Nakazawa, K., Tanabe, K., Tachiki, M., Kawarada, H., & Koizumi, S. (2001). Excitonic recombination radiation in phosphorus-doped CVD diamonds. Physical Review B - Condensed Matter and Materials Physics, 64(23), 2352031-2352034. [235203].

    Excitonic recombination radiation in phosphorus-doped CVD diamonds. / Nakazawa, K.; Tanabe, K.; Tachiki, M.; Kawarada, Hiroshi; Koizumi, S.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 64, No. 23, 235203, 15.12.2001, p. 2352031-2352034.

    Research output: Contribution to journalArticle

    Nakazawa, K, Tanabe, K, Tachiki, M, Kawarada, H & Koizumi, S 2001, 'Excitonic recombination radiation in phosphorus-doped CVD diamonds', Physical Review B - Condensed Matter and Materials Physics, vol. 64, no. 23, 235203, pp. 2352031-2352034.
    Nakazawa K, Tanabe K, Tachiki M, Kawarada H, Koizumi S. Excitonic recombination radiation in phosphorus-doped CVD diamonds. Physical Review B - Condensed Matter and Materials Physics. 2001 Dec 15;64(23):2352031-2352034. 235203.
    Nakazawa, K. ; Tanabe, K. ; Tachiki, M. ; Kawarada, Hiroshi ; Koizumi, S. / Excitonic recombination radiation in phosphorus-doped CVD diamonds. In: Physical Review B - Condensed Matter and Materials Physics. 2001 ; Vol. 64, No. 23. pp. 2352031-2352034.
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    AU - Tachiki, M.

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