Surface related and intrinsic exciton recombination dynamics in ZnO nanoparticles synthesized by a sol-gel method

Hsu Cheng Hsu; Hsin Ying Huang; Martin O. Eriksson; Tsen Fang Dai; Per Olof Holtz

doi:10.1063/1.4774002

Surface related and intrinsic exciton recombination dynamics in ZnO nanoparticles synthesized by a sol-gel method

Hsu Cheng Hsu, Hsin Ying Huang, Martin O. Eriksson, Tsen Fang Dai, Per Olof Holtz

Department of Photonics

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

20 Citations (Scopus)

Abstract

ZnO nanoparticles with controlled sizes produced by a sol-gel method are studied by means of time-integrated as well as time-resolved photoluminescence (TRPL) spectroscopy. Room-temperature photoluminescence spectra show a blueshift of the excitonic emission with the decreasing particle size, which is attributed to the quantum confinement effect. The temperature dependence of the exciton lifetimes deduced from the TRPL results contains two components: the fast decay is attributed to surface trapping of exciton and the slow decay is mainly representative of the radiative processes involving the bound or free excitons.

Original language	English
Article number	013109
Journal	Applied Physics Letters
Volume	102
Issue number	1
DOIs	https://doi.org/10.1063/1.4774002
Publication status	Published - 2013 Jan 7

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4774002

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abstract = "ZnO nanoparticles with controlled sizes produced by a sol-gel method are studied by means of time-integrated as well as time-resolved photoluminescence (TRPL) spectroscopy. Room-temperature photoluminescence spectra show a blueshift of the excitonic emission with the decreasing particle size, which is attributed to the quantum confinement effect. The temperature dependence of the exciton lifetimes deduced from the TRPL results contains two components: the fast decay is attributed to surface trapping of exciton and the slow decay is mainly representative of the radiative processes involving the bound or free excitons.",

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AU - Dai, Tsen Fang

AU - Holtz, Per Olof

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AB - ZnO nanoparticles with controlled sizes produced by a sol-gel method are studied by means of time-integrated as well as time-resolved photoluminescence (TRPL) spectroscopy. Room-temperature photoluminescence spectra show a blueshift of the excitonic emission with the decreasing particle size, which is attributed to the quantum confinement effect. The temperature dependence of the exciton lifetimes deduced from the TRPL results contains two components: the fast decay is attributed to surface trapping of exciton and the slow decay is mainly representative of the radiative processes involving the bound or free excitons.

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