Mechanisms of yellow and red photoluminescence in wurtzite and cubic GaN

M. Godlewski*, T. Suski, I. Grzegory, S. Porowski, R. Langer, A. Barski, J. P. Bergman, B. Monemar, E. M. Goldys, M. R. Phillips

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    The origin of two "deep" photoluminescence (PL) emissions observed in wurtzite (yellow PL) and cubic (red PL) GaN is discussed. PL and time-resolved PL studies confirm donor-acceptor pair character of the yellow band in wurtzite GaN and point to participation of shallow donors in this emission. A similar PL mechanism is proposed for the red emission of cubic GaN. We further show a puzzling property of both yellow and red PLs. Both yellow and red emissions show spatial homogeneity and are only weakly dependent on surface morphology.

    Original languageEnglish
    Pages (from-to)326-330
    Number of pages5
    JournalActa Physica Polonica A
    Issue number2
    Publication statusPublished - 1998


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