標題: High-excitation effect on photoluminescence of sol-gel ZnO nanopowder
作者: Chia, C. H.
Lai, Y. J.
Han, T. C.
Chiou, J. W.
Hu, Y. M.
Chou, W. C.
電子物理學系
Department of Electrophysics
關鍵字: biexcitons;II-VI semiconductors;nanoparticles;photoluminescence;sol-gel processing;zinc compounds
公開日期: 22-二月-2010
摘要: We studied the power-dependent photoluminescence of ZnO nanopowder grown by sol-gel method at low temperature. At moderate optical pumping intensity, two nonlinear emission bands due to the radiative recombination of free biexciton and the inelastic exciton-exciton scattering were detected. We found that the threshold of the excitation density for the emergence of the nonlinear emission bands is low (< 18 W/cm(2)) in sol-gel ZnO nanopowders.
URI: http://dx.doi.org/10.1063/1.3327338
http://hdl.handle.net/11536/5827
ISSN: 0003-6951
DOI: 10.1063/1.3327338
期刊: APPLIED PHYSICS LETTERS
Volume: 96
Issue: 8
結束頁: 
顯示於類別:期刊論文


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