期刊
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
卷 42, 期 8, 页码 2143-2146出版社
ELSEVIER
DOI: 10.1016/j.physe.2010.04.013
关键词
ZnO nanorods; Annealing; Optical properties; Photoluminescence
资金
- Ministry of Education, Science and Technology [2009-0093823]
- Korea Evaluation Institute of Industrial Technology (KEIT) [2005-N-CT-HM-E-01-0000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0093823] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Well aligned zinc oxide (ZnO) nanorods were synthesized on a Si substrate with a hydrothermal method. The effects of annealing on the optical properties of ZnO nanorods were examined by annealing samples in oxygen or forming gas (H-2:N-2=1:9). The optical properties of the ZnO nanorods were investigated using room temperature photoluminescence (PL) measurement, which revealed two emission bands. After each annealing, the intensity of ultraviolet (UV) emission increased, while the intensity of visible emission decreased. The reason for the increase in the ratio of UV to visible emission, I-UV/I-DLE, of ZnO nanorods annealed in oxygen or forming gas is attributed to the reduction in the concentration of the oxygen defects and to the less OH groups on the ZnO nanorod surface. Effects of crystal size, diameter, and chemisorbed oxygen were precluded. (C) 2010 Elsevier B.V. All rights reserved.
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