Semiconductor Science and Technology 12(11), 1396 (1997).
GaN grown on Si(111) by MBE under nitrogen rich conditions has been studied by PL. Intense excitonic emissions as narrow as 1.7 meV are observed at LT. The free A, B and C excitons are observed at 3.4786, 3.484 and 3.503 eV respectively. The crystal field and spin orbit splitting can be decuded, 9.9 meV and 19.9 meV respectively. Four extrinsic transitions at 3.4755, 3.4714, 3.456 and 3.450 eV have also been observed and assigned to bound excitons and donor-to-acceptor transitions. Also a band at 3.41-3.42 eV is attributed to a donor-to-acceptor transition.
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Contributed by Pierre Gibart from isolde.unice.fr. on December 15, 1997 3:21:32 AM
last updated Wednesday, April 27, 2005 7:51:08 PM.
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