TITLE

Radiative and nonradiative recombination processes in lattice-matched (Cd,Zn)O/(Mg,Zn)O multiquantum wells

AUTHOR(S)
Makino, T.; Chia, C. H.; Chia, C.H.; Tuan, Nguen T.; Segawa, Y.; Kawasaki, M.; Ohtomo, A.; Tamura, K.; Koinuma, H.
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/11/2000, Vol. 77 Issue 11
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Time-resolved photoluminescence studies have been performed on (Cd,Zn)O/(Mg,Zn)O multiquantum wells, which are almost perfectly lattice matched (0.034%), grown by laser molecular-beam epitaxy on a ScAlMgO[sub 4] substrate. Radiative recombination of excitons in the wells exhibits a significant spectral distribution of times. This distribution was interpreted in terms of localization of excitons by potential fluctuations due to alloy disorder and to well width and depth variations. The temperature dependence of the radiative lifetime of excitons was deduced from the measurement of both the photoluminescence decay time and intensity. We found that the radiative lifetime increases linearly with temperature, showing a two-dimensional feature of excitons in the quantum wells. © 2000 American Institute of Physics.
ACCESSION #
4413718

 

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