| Cai Jing-wei,Xu Jian-ping,Zhang Xiao-song,Niu Xi-ping,Xing Tong-yan,Ji Ting,Li Lan.Defect-related visible luminescence of ZnO nanorods annealed in oxygen ambient[J].Optoelectronics Letters,2012,8(1):4-8 |
| Defect-related visible luminescence of ZnO nanorods annealed in oxygen ambient |
| Author Name | Affiliation | | Cai Jing-wei | Key Laboratory of Display Materials and Photoelectric Devices of Education Ministry of China, Key Laboratory for
Optoelectronic Materials and Devices, Insitute of Material Physics, Tianjin Universiry of Technology Tianjin 300384,
China | | Xu Jian-ping | | | Zhang Xiao-song | Key Laboratory of Display Materials and Photoelectric Devices of Education Ministry of China, Key Laboratory for
Optoelectronic Materials and Devices, Insitute of Material Physics, Tianjin Universiry of Technology Tianjin 300384,
China | | Niu Xi-ping | Key Laboratory of Display Materials and Photoelectric Devices of Education Ministry of China, Key Laboratory for
Optoelectronic Materials and Devices, Insitute of Material Physics, Tianjin Universiry of Technology Tianjin 300384,
China | | Xing Tong-yan | Key Laboratory of Display Materials and Photoelectric Devices of Education Ministry of China, Key Laboratory for
Optoelectronic Materials and Devices, Insitute of Material Physics, Tianjin Universiry of Technology Tianjin 300384,
China | | Ji Ting | Tianjin Xinhua Staff and Workers Universiry, Tianjin 300040, China
(Received 7 June 2011) | | Li Lan | Key Laboratory of Display Materials and Photoelectric Devices of Education Ministry of China, Key Laboratory for
Optoelectronic Materials and Devices, Insitute of Material Physics, Tianjin Universiry of Technology Tianjin 300384,
China |
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| Abstract: |
| ZnO nanorods prepared by a solution-phase method are annealed at different temperatures in oxygen ambient. The luminescence
properties of the samples are investigated. In the same excitation condition, the photoluminescence (PL) spectra of all samples
show an ultraviolet (UV) emission and a broad strong visible emission band. The asymmetric visible emission band of annealed
samples has a red-shift as the annealing temperature increasing from 200 °C to 600 °C and it can be deconvoluted into two
subband emissions centered at 535 nm (green emission) and 611 nm (orange-red emission) by Gaussian-fitting analysis. Analyses
of PL excitation (PLE) spectra and PL spectra at different excitation wavelengths reveal that the green emission and the orange-red
emission have a uniform initial state, which can be attributed to the electron transition from Zn interstitial (Zni) to oxygen vacancy (Vo) and oxygen interstitial (Oi), respectively. |
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| This work has been supported by the National Natural Science Foundation of China (Nos.60877029, 10904109, 60977035 and 60907021), |
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