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题名: Synthesis and photoluminescence properties of vertically aligned ZnO nanorod-nanowall junction arrays on a ZnO-coated silicon substrate
作者: Li C (Li Chun);  Fang GJ (Fang Guojia);  Su FH (Su Fuhai);  Li GH (Li Guohua);  Wu XG (Wu Xiaoguang);  Zhao XZ (Zhao Xingzhong)
发表日期: 2006
摘要: Arrays of vertically well-aligned ZnO nanorod-nanowall junctions have been synthesized on an undoped ZnO-coated silicon substrate by a carbothermal reduction and vapour phase transport method. X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that the nanostructures are well-oriented with the c-axis perpendicular to the substrate. The room temperature photoluminescence (PL) spectrum of the as-prepared ZnO nanostructure reveals a dominant near-band-edge (NBE) emission peak and a weak deep level (DL) emission, which demonstrates its good optical properties. Temperature-dependent PL spectra show that both the intensity of NBE and DL emissions increased with decreasing temperature. The NBE emission at 3.27 eV is identified to originate from the radiative free exciton recombination. The possible growth mechanism of ZnO nanorod-nanowall junctions is also proposed.
KOS主题词: Optical properties;  Zinc oxide;  Thin films;  Ion beam lithography;  Vapor-plating;  Nanowires;  Development;  emission;  Epitaxy
刊名: NANOTECHNOLOGY
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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Li C (Li Chun); Fang GJ (Fang Guojia); Su FH (Su Fuhai); Li GH (Li Guohua); Wu XG (Wu Xiaoguang); Zhao XZ (Zhao Xingzhong) .Synthesis and photoluminescence properties of vertically aligned ZnO nanorod-nanowall junction arrays on a ZnO-coated silicon substrate ,NANOTECHNOLOGY,2006 ,17(15):3740-3744
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