Photoluminescence characteristics of high quality ZnO nanowires and its enhancement by polymer covering

K. W. Liu; R. Chen; G. Z. Xing; T. Wu; H. D. Sun

doi:10.1063/1.3291106

Photoluminescence characteristics of high quality ZnO nanowires and its enhancement by polymer covering

K. W. Liu, R. Chen, G. Z. Xing, T. Wu, H. D. Sun

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144 Scopus citations

Abstract

We investigated the photoluminescence (PL) properties of ZnO nanowires with and without covering with polymethyl methacrylate (PMMA). Low temperature PL spectra of as-grown ZnO nanowires are dominated by near band edge (NBE) emission due to donor bound excitons and free-to-bound recombination (FB). FB emission persists till 300 K and together with free exciton emission governs the lineshape of the PL spectra. After covering with PMMA, the integral intensity of NBE emission increases about three times, indicating significantly improved excitonic emission efficiency. A model based on surface states and energy bands theory was proposed to interpret this emission enhancement.

Original language	English (US)
Article number	023111
Journal	Applied Physics Letters
Volume	96
Issue number	2
DOIs	https://doi.org/10.1063/1.3291106
State	Published - 2010
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Photoluminescence characteristics of high quality ZnO nanowires and its enhancement by polymer covering",

abstract = "We investigated the photoluminescence (PL) properties of ZnO nanowires with and without covering with polymethyl methacrylate (PMMA). Low temperature PL spectra of as-grown ZnO nanowires are dominated by near band edge (NBE) emission due to donor bound excitons and free-to-bound recombination (FB). FB emission persists till 300 K and together with free exciton emission governs the lineshape of the PL spectra. After covering with PMMA, the integral intensity of NBE emission increases about three times, indicating significantly improved excitonic emission efficiency. A model based on surface states and energy bands theory was proposed to interpret this emission enhancement.",

author = "Liu, {K. W.} and R. Chen and Xing, {G. Z.} and T. Wu and Sun, {H. D.}",

year = "2010",

doi = "10.1063/1.3291106",

language = "English (US)",

volume = "96",

journal = "Applied Physics Letters",

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T1 - Photoluminescence characteristics of high quality ZnO nanowires and its enhancement by polymer covering

AU - Liu, K. W.

AU - Chen, R.

AU - Xing, G. Z.

AU - Wu, T.

AU - Sun, H. D.

PY - 2010

Y1 - 2010

N2 - We investigated the photoluminescence (PL) properties of ZnO nanowires with and without covering with polymethyl methacrylate (PMMA). Low temperature PL spectra of as-grown ZnO nanowires are dominated by near band edge (NBE) emission due to donor bound excitons and free-to-bound recombination (FB). FB emission persists till 300 K and together with free exciton emission governs the lineshape of the PL spectra. After covering with PMMA, the integral intensity of NBE emission increases about three times, indicating significantly improved excitonic emission efficiency. A model based on surface states and energy bands theory was proposed to interpret this emission enhancement.

AB - We investigated the photoluminescence (PL) properties of ZnO nanowires with and without covering with polymethyl methacrylate (PMMA). Low temperature PL spectra of as-grown ZnO nanowires are dominated by near band edge (NBE) emission due to donor bound excitons and free-to-bound recombination (FB). FB emission persists till 300 K and together with free exciton emission governs the lineshape of the PL spectra. After covering with PMMA, the integral intensity of NBE emission increases about three times, indicating significantly improved excitonic emission efficiency. A model based on surface states and energy bands theory was proposed to interpret this emission enhancement.

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DO - 10.1063/1.3291106

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VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 023111

ER -

Photoluminescence characteristics of high quality ZnO nanowires and its enhancement by polymer covering

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