Chin. Phys. Lett.  2004, Vol. 21 Issue (11): 2301-2304    DOI:
Original Articles |
Photoluminescence Characterization of Nanocrystalline ZnO Array
CHANG Yong-Qin1,2;YU Da-Peng1;LI Guo-Hua3;FANG Zai-Li3;ZHANG Ye1;CHEN Yao-Feng1;YANG FU-Hua3
1Department of Physics, National Key Laboratory of Mesoscopic Physics, and Electron Microscopy Laboratory, Peking University, Beijing 100871 2School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 3National Laboratory of Superlattices & Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083
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CHANG Yong-Qin, YU Da-Peng, LI Guo-Hua et al  2004 Chin. Phys. Lett. 21 2301-2304
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Abstract High-density and uniform well-aligned ZnO sub-micron rods are synthesized on the silicon substrate over a large area. The morphology and structure of the ZnO sub-micron rods are investigated by x-ray diffraction, transmission electron microscopy and Raman spectra. It is found that the ZnO sub-micron rods are of high crystal quality with the diameter in the range of 400--600 nm and the length of several micrometres long. The optical properties were studied by photoluminescence spectra. The results show that the intensity of the ultraviolet emission at 3.3 eV is rather high, meanwhile the deep level transition centred at about 2.38 eV is weak. The free exciton emission could also be observed at low temperature, which implies the high optical quality of the ZnO sub-micron rods. This growth technique provides one effective way to fabricate the high crystal quality ZnO nanowires array, which is very important for potential applications in the new-type optoelectronic nanodevices.

Keywords: 81.07.Bc      61.46.+w      78.55.Et      78.30.Fs     
Published: 01 November 2004
PACS:  81.07.Bc (Nanocrystalline materials)  
  61.46.+w  
  78.55.Et (II-VI semiconductors)  
  78.30.Fs (III-V and II-VI semiconductors)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2004/V21/I11/02301
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CHANG Yong-Qin
YU Da-Peng
LI Guo-Hua
FANG Zai-Li
ZHANG Ye
CHEN Yao-Feng
YANG FU-Hua
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