Biexciton emission from sol-gel ZnMgO nanopowders

C. H. Chia, Y. J. Lai, W. L. Hsu, T. C. Han, J. W. Chiou, Y. M. Hu, Y. C. Lin, W. C. Fan, Wu-Ching Chou

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We studied the power-dependent photoluminescence of Zn1-x Mgx O nanopowders grown by sol-gel method, at temperature T=100 K. At moderate optical pumping intensity, a nonlinear emission band due to the radiative recombination of free biexcitons was detected. We found that the free biexciton binding energies of Zn 1-x Mg x O nanopowder (0.01 ≥ x ≥ 0.05) are nearly constant (13.5±1.5 meV).

Original languageEnglish
Article number191902
JournalApplied Physics Letters
Issue number19
StatePublished - 7 Jun 2010


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