Time-resolved photoluminescence from ZnO nanostructures

Wai Ming Kwok; A. B. Djurišić; Y. H. Leung; W. K. Chan; D. L. Phillips

doi:10.1063/1.2137456

Time-resolved photoluminescence from ZnO nanostructures

Wai Ming Kwok, A. B. Djurišić, Y. H. Leung, W. K. Chan, D. L. Phillips

Research output: Journal article publication › Journal article › Academic research › peer-review

111 Citations (Scopus)

Abstract

Different ZnO nanostructures (tetrapods, shells, rods, and highly faceted rods) were characterized by photoluminescence (PL) and time-resolved PL measurements. It was found that different nanostructures exhibit very different optical properties in terms of defect emission and decay times of the spontaneous emission. No correlation was found between the PL decay times and defect emission intensities and defect emission positions. The short decay times of the UV emission are most likely due to nonradiative defects that are correlated with the crystalline quality and do not contribute to the visible emission. Neither short PL decay times nor intense defect emissions rule out achievement of stimulated emission.

Original language	English
Article number	223111
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	87
Issue number	22
DOIs	https://doi.org/10.1063/1.2137456
Publication status	Published - 30 Nov 2005
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2137456

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title = "Time-resolved photoluminescence from ZnO nanostructures",

abstract = "Different ZnO nanostructures (tetrapods, shells, rods, and highly faceted rods) were characterized by photoluminescence (PL) and time-resolved PL measurements. It was found that different nanostructures exhibit very different optical properties in terms of defect emission and decay times of the spontaneous emission. No correlation was found between the PL decay times and defect emission intensities and defect emission positions. The short decay times of the UV emission are most likely due to nonradiative defects that are correlated with the crystalline quality and do not contribute to the visible emission. Neither short PL decay times nor intense defect emissions rule out achievement of stimulated emission.",

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AU - Djurišić, A. B.

AU - Leung, Y. H.

AU - Chan, W. K.

AU - Phillips, D. L.

PY - 2005/11/30

Y1 - 2005/11/30

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AB - Different ZnO nanostructures (tetrapods, shells, rods, and highly faceted rods) were characterized by photoluminescence (PL) and time-resolved PL measurements. It was found that different nanostructures exhibit very different optical properties in terms of defect emission and decay times of the spontaneous emission. No correlation was found between the PL decay times and defect emission intensities and defect emission positions. The short decay times of the UV emission are most likely due to nonradiative defects that are correlated with the crystalline quality and do not contribute to the visible emission. Neither short PL decay times nor intense defect emissions rule out achievement of stimulated emission.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Time-resolved photoluminescence from ZnO nanostructures

Abstract

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