Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders

標題:	Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders
作者:	Chia, C. H. Chen, J. N. Han, T. C. Chiou, J. W. Lin, Y. C. Hsu, W. L. Chou, W. C. 電子物理學系 Department of Electrophysics
公開日期:	15-三月-2011
摘要:	We found that the exciton-phonon coupling in the Zn(1-x)Mg(x)O powders (0.01 <= x <= 0.07) is greatly influenced by the crystalline-size. Two well-resolved photoluminescence (PL) bands due to recombination of free exciton and its longitudinal optical (LO)-phonon replicas enable us to analyze the relative intensities among free excitons, one-LO-phonon replicas, and two-LO-phonon replicas. As crystalline size increases, a larger enhancement of the PL-intensity ratio of a free exciton to its LO-phonon replicas was found compared to that of two LO-phonon replica to one-LO-phonon replica. (C) 2011 American Institute of Physics. [doi:10.1063/1.3563574]
URI:	http://dx.doi.org/10.1063/1.3563574 http://hdl.handle.net/11536/9140
ISSN:	0021-8979
DOI:	10.1063/1.3563574
期刊:	JOURNAL OF APPLIED PHYSICS
Volume:	109
Issue:	6
結束頁:
顯示於類別：	期刊論文

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