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Defect-related visible luminescence of ZnO nanorods annealed in oxygen ambient 被引量：5

Defect-related visible luminescence of ZnO nanorods annealed in oxygen ambient
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摘要 ZnO nanorods prepared by a solution-phase method are annealed at different temperatures in oxygen ambient.The luminescence properties of the samples are investigated.In the same excitation condition,the photoluminescence(PL) spectra of all samples show an ultraviolet(UV) emission and a broad strong visible emission band.The asymmetric visible emis-sion band of annealed samples has a red-shift as the annealing temperature increasing from 200 ℃ to 600 ℃ and it can be deconvoluted into two subband emissions centered at 535 nm(green emission) and 611 nm(orange-red emission) by Gaussian-fitting analysis.Analyses of PL excitation(PLE) spectra and PL spectra at different excitation wavelengths reveal that the green emission and the orange-red emission have a uniform initial state,which can be attributed to the electron transition from Zn interstitial(Zni) to oxygen vacancy(Vo) and oxygen interstitial(Oi),respectively.
作者 蔡井维 徐建萍 张晓松 牛喜平 邢彤焱 季婷 李岚
机构地区 Key Laboratory of Display Materials and Photoelectric Devices of Education Ministry of China Tianjin Xinhua Staff and Workers University
出处 《Optoelectronics Letters》 EI 2012年第1期4-8,共5页 光电子快报（英文版）
基金 supported by the National Natural Science Foundation of China(Nos.60877029,10904109,60977035 and 60907021) the Natural Science Foundation of Tianjin(Nos.09JCYBJC01400 and 10SYSYJC28100) the Key Subject for Materials Physics and Chemistry of Tianjin the Open Foundation of Key Laboratory of Luminescence and Optical Information of Ministry of Education(Nos.2010LOI02 and 2010LOI11)
关键词 Electron transitions Excited states LUMINESCENCE NANORODS OXYGEN Zinc Zinc oxide 氧化锌纳米棒 退火温度 发光性能 氧气氛 缺陷 排放量 激励条件 光致发光
分类号 TN304.21 [电子电信—物理电子学]
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同被引文献70

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Optoelectronics Letters
2012年 第1期

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