Photoluminescence Studies of Porous ZnO Nanorods
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概要
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Porous ZnO nanorods were prepared by thermal annealing at 700 °C in argon atmosphere. Temperature-dependent photoluminescence (PL) was carried out to investigate the optical properties of the porous ZnO nanorods. The average diameter and density of the pores formed on the surface of the porous ZnO nanorods are 25 nm and $1.2\times 10^{10}$ cm-2, respectively. Six peaks at 3.380, 3.366, 3.338, 3.267, 3.227, and 3.198 eV, corresponding to free exciton (FX), neutral donor bound exciton (D0X), first-order longitudinal optical phonon replica of free exciton (FX-1LO), FX-2LO, FX-3LO, and FX-4LO emissions, are obtained at low temperature (10 K). The FX emission peak energy of the porous ZnO nanorods exhibits an anomalous behavior as the temperature is increased to 100 K. The activation energy of the porous ZnO nanorods is found to be about 8.6 meV, and the values of fitting parameters to Varshni's empirical equation are $\alpha = 6\times 10^{-4}$ eV/K and $\beta = 680$ K.
- 2011-03-25
著者
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Jeon Su
Department Of Food Science And Nutrition Andong National University
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Kim Min
Department Of Chemical Engineering Cheju National University
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Kim Jong
Department Of Agricultural Bio-resources National Academy Of Agricultural Science Rural Development
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Kim Jin
Division Of Applied Life Science (bk21 Program) Institute Of Agricultural & Life Sciences Depart
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Jeon Su
Department of Nano Systems Engineering, Center for Nano Manufacturing, Inje University, Gimhae 621-749, Republic of Korea
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Leem Jae-Young
Department of Nano Systems Engineering, Center for Nano Manufacturing, Inje University, Gimhae 621-749, Republic of Korea
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Son Jeong-Sik
Department of Visual Optics, Kyungwoon University, Gumi, Gyeongbuk 730-850, Republic of Korea
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Lee Dong-Yul
Epi-manufacturing Technology, Samsung LED Co., Ltd., Suwon 443-373, Republic of Korea
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Yim Kwang
Department of Nano Systems Engineering, Center for Nano Manufacturing, Inje University, Gimhae 621-749, Republic of Korea
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Kim Min
Department of Applied Science, Korea Maritime University, Busan 606-791, Korea
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Kim Jin
Division of Advanced Materials Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Kim Jin
Division of Advanced Materials Engineering, Chonbuk National University, Jeonju 561-756, Korea
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Son Jeong-Sik
Department of Visual Optics, Kyungwoon University, Gumi 730-850, Republic of Korea
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Son Jeong-Sik
Department of Visual Optics, Kyungwoon University, Gumi 730-850, Korea
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KIM Min
Department of Animal Science and Biotechnology, College of Agriculture and Life Science, Chungnam National University, Daejeon 305–764, Korea
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