TITLE

Nature of room-temperature photoluminescence in ZnO

AUTHOR(S)
Shan, W.; Walukiewicz, W.; Ager, J. W.; Yu, K. M.; Yuan, H. B.; Xin, H. P.; Cantwell, G.; Song, J. J.
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/9/2005, Vol. 86 Issue 19, p191911
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The temperature dependence of the photoluminescence (PL) transitions associated with various excitons and their phonon replicas in high-purity bulk ZnO has been studied at temperatures from 12 K to above room temperature (320 K). Several strong PL emission lines associated with longitudinal optical (LO) phonon replicas of free and bound excitons are clearly observed. The room-temperature PL spectrum is dominated by the phonon replicas of the free exciton transition with the maximum at the first LO phonon replica. The results explain the discrepancy between the transition energy of free exciton determined by reflection measurement and the peak position obtained by the PL measurement.
ACCESSION #
17164788

 

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