Abstract
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 language | English |
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| Pages (from-to) | 326-330 |
| Number of pages | 5 |
| Journal | Acta Physica Polonica A |
| Volume | 94 |
| Issue number | 2 |
| Publication status | Published - 1998 |