Influence of annealing on the structural and optical properties of ZnO:Tb thin films

被引:92
|
作者
Teng, X. M.
Fan, H. T.
Pan, S. S.
Ye, C.
Li, G. H. [1 ]
机构
[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
[2] Chinese Acad Sci, Anhui Key Lab Nanomat & Nanotechnol, Inst Solid State Phys, Hefei 230031, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1063/1.2227268
中图分类号
O59 [应用物理学];
学科分类号
摘要
The influence of annealing on the morphological, structural, and optical properties of ZnO:Tb thin films on Si substrate grown by magnetron cosputtering is investigated. It has been found that the ZnO:Tb thin films with structures of tetrapod and screwlike nanorod are formed after annealing at temperature of 950 degrees C. X-ray photoelectron spectroscopy, energy dispersive spectroscopy, and Raman analyses prove that the tetrapod-aiguille zinc oxide (T-A-ZnO) and the screwlike nanorods are composed of Zn, Tb, and O elements. The photoluminescence spectra of the ZnO:Tb thin films with the T-A-ZnO structure and the screwlike nanorods are featured with two ultraviolet emission peaks and one strong green emission band, and the photoluminescence intensity increases with increasing annealing temperature. The surface defects in the T-A-ZnO structure and the screwlike nanorods are considered to be responsible for enhanced green emission in the annealed ZnO:Tb thin films. (c) 2006 American Institute of Physics.
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页数:5
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