標題: | Fabrication and Characterization of Mg-Doped ZnO Nanorod Arrays |
作者: | Liao, Hung-Chou Chen, San-Yuan Peng, Cheng-Hsiung Lin, Chin-Ching Cheng, Syh-Yuh 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | ZnO Nanorods;Annealing;Doped |
公開日期: | 1-七月-2010 |
摘要: | Photoelectronic characteristics are investigated in well-aligned MgO-coated ZnO nanorods (MgO/ZnO nanocables) grown on Si substrates buffered with ZnO film at a low temperature by solution techniques. Transmission electron microscopy shows that a rough surface was observed for the MgO-coated ZnO nanorods due to deposition of MgO nanoparticles on the surface of the ZnO nanorods. However, after annealed at high temperatures, the surface of the MgO-coated ZnO nanorods was flattened to form Mg-doped ZnO nanorods. Photoluminescence spectra of Mg-doped ZnO nanorods displayed a blue shift of the near-band-edge emission with increasing annealing temperature indicative of an increase in the band gap of the MgZnO alloy due to diffusion of the Mg atoms into the ZnO nanorods. In contrast, no blue shift was detected for the samples annealed in H(2)/N(2) (5%/95%) reduction atmosphere but a blue emission was detected at 800 degrees C, indicating that MgO diffusion process may produce a new luminescent center to emit the blue emission in H(2)/N(2) reduction atmosphere. |
URI: | http://dx.doi.org/10.1166/jnn.2010.1693 http://hdl.handle.net/11536/8901 |
ISSN: | 1533-4880 |
DOI: | 10.1166/jnn.2010.1693 |
期刊: | JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY |
Volume: | 10 |
Issue: | 7 |
起始頁: | 4696 |
結束頁: | 4700 |
顯示於類別: | 會議論文 |