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Defect-related visible luminescence of ZnO nanorods annealed in oxygen ambient
  • 期刊名称:Optoelectronics Letters
  • 时间:0
  • 页码:4-8
  • 分类:TN104.3[电子电信—物理电子学] TB383[一般工业技术—材料科学与工程]
  • 作者机构:[1]Key Laboratory of Display Materials and Photoelectric Devices of Education Ministry of China, Key Laboratory for Optoelectronic Materials and Devices, Insimte of Material Physics, Tianjin University of Technology, Tianjin 300384, China, [2]Tianjin Xinhua Staff and Workers University, Tianjin 300040, China
  • 相关基金:This work has been supported by the National Natural Science Foundation of China (Nos.60877029, 10904109, 60977035 and 60907021), the Natural Science Foundation ofTianjin (Nos.09JCYBJC01400 and 10SYSYJC28100), the Key Subject for Materials Physics and Chemistry of Tianjin, and the Open Foundation of Key Laboratory of Luminescence and Optical Information of Ministry of Education (Nos.2010LOI02 and 2010LO111).
  • 相关项目:ZnO低维结构稀磁半导体微结构、光学和磁学性质尺度效应研究
中文摘要:

一个答案阶段方法准备的 ZnO nanorods 在氧在不同温度被退火周围。样品的光性质被调查。处于一样的刺激条件,所有样品的光致发光(PL ) 系列出现一紫外(紫外) 排放和一个宽广强壮的可见排放乐队。退火的样品的不对称的可见排放乐队有一象从 200 牤畯 ? 潳楤浵猠汵桰瑡 ? 敷敲愠摤摥琠? 桴 ? 慷整 ? 慳灭敬※湡漠敶 ? 整灭牥牰 ? 牰增加的退火的温度红移动吗??

英文摘要:

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 emission 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.

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