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Title: The effect of post-annealing treatment on photoluminescence of ZnO nanorods prepared by hydrothermal synthesis
Authors: Quang, L.H.
Chua, S.J. 
Loh, K.P. 
Fitzgerald, E.
Keywords: A1. Nanostructures
A2. Hydrothermal crystal growth
B1. Oxides
B1. Zinc compounds
B2. Semiconducting materials
Issue Date: 18-Jan-2006
Citation: Quang, L.H., Chua, S.J., Loh, K.P., Fitzgerald, E. (2006-01-18). The effect of post-annealing treatment on photoluminescence of ZnO nanorods prepared by hydrothermal synthesis. Journal of Crystal Growth 287 (1) : 157-161. ScholarBank@NUS Repository.
Abstract: In this study, we investigated the effect of post-annealing treatment on the UV photoluminescence of ZnO nanorods deposited on (0 0 0 1) GaN by hydrothermal synthesis. The temperature dependence of the photoluminescence spectra of ZnO nanorods annealed in nitrogen and oxygen was also studied. The as-grown ZnO nanorods were annealed in nitrogen and oxygen at 800°C in 30 min. Results showed that UV light emission was greatly enhanced by annealing the as-grown ZnO nanorods in nitrogen ambient. Meanwhile, strong visible light emission was observed from the ZnO nanorods annealed in oxygen ambient. The effect of the annealing ambient and the photoluminescence temperature dependence were discussed with the relations to the structural defects. The time-resolved photoluminescence measurement was also proceeded to characterize the optical quality of the annealed ZnO nanorods. The decay times were 74 and 84 ps for oxygen and nitrogen annealed ZnO nanorods, respectively. Once again, these results confirmed that the nitrogen annealed ZnO nanorods had better optical quality with less nonradiative related defects. © 2005 Elsevier B.V. All rights reserved.
Source Title: Journal of Crystal Growth
ISSN: 00220248
DOI: 10.1016/j.jcrysgro.2005.10.060
Appears in Collections:Staff Publications

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