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

C. H. Chia; J. N. Chen; T. C. Han; J. W. Chiou; Y. C. Lin; W. L. Hsu; Wu-Ching Chou

doi:10.1063/1.3563574

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

C. H. Chia, J. N. Chen, T. C. Han, J. W. Chiou, Y. C. Lin, W. L. Hsu, Wu-Ching Chou

Department of Electrophysics

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We found that the exciton-phonon coupling in the Zn_1-xMg _xO 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.

Original language	English
Article number	063526
Journal	Journal of Applied Physics
Volume	109
Issue number	6
DOIs	https://doi.org/10.1063/1.3563574
State	Published - 15 Mar 2011

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title = "Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders",

abstract = "We found that the exciton-phonon coupling in the Zn1-xMg xO 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.",

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T1 - Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders

AU - Chia, C. H.

AU - Chen, J. N.

AU - Han, T. C.

AU - Chiou, J. W.

AU - Lin, Y. C.

AU - Hsu, W. L.

AU - Chou, Wu-Ching

PY - 2011/3/15

Y1 - 2011/3/15

N2 - We found that the exciton-phonon coupling in the Zn1-xMg xO 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.

AB - We found that the exciton-phonon coupling in the Zn1-xMg xO 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.

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