Influence of Y-doped induced defects on the optical and magnetic properties of ZnO nanorod arrays prepared by low-temperature hydrothermal process |
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Authors: | Chung-Yuan Kung San-Lin Young Hone-Zern Chen Ming-Cheng Kao Lance Horng Yu-Tai Shih Chen-Cheng Lin Teng-Tsai Lin Chung-Jen Ou |
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Affiliation: | Department of Electrical Engineering, National Chung Hsing University, Taichung, 40227, Taiwan. cykung@dragon.nchu.edu.tw. |
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Abstract: | ABSTRACT: One-dimensional pure zinc oxide (ZnO) and Y-doped ZnO nanorod arrays have been successfully fabricated on the silicon substrate for comparison by a simple hydrothermal process at the low temperature of 90°C. The Y-doped nanorods exhibit the same c-axis-oriented wurtzite hexagonal structure as pure ZnO nanorods. Based on the results of photoluminescence, an enhancement of defect-induced green-yellow visible emission is observed for the Y-doped ZnO nanorods. The decrease of E2(H) mode intensity and increase of E1(LO) mode intensity examined by the Raman spectrum also indicate the increase of defects for the Y-doped ZnO nanorods. As compared to pure ZnO nanorods, Y-doped ZnO nanorods show a remarked increase of saturation magnetization. The combination of visible photoluminescence and ferromagnetism measurement results indicates the increase of oxygen defects due to the Y doping which plays a crucial role in the optical and magnetic performances of the ZnO nanorods. |
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Keywords: | Y-doped ZnO nanorods Wurtzite Saturation magnetization Photoluminescence Ferromagnetism |
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