| 光谱学与光谱分析 |
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| Effects of Zn2+ Doping on the Structural and Luminescent Properties of GdTaO4∶Eu3+ Phosphors |
| XIAO Li-hong,GU Mu*,LIU Xiao-lin,ZHANG Rui,LIU Bing-jie,XU Xin |
| Laboratory of Waves and Microstructure Materials, Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China |
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Abstract GdTaO4∶Eu0.1 phosphors with different concentrations of Zn2+ dopant were synthesized by the solid-state reaction at high temperature. The present paper mainly focused on the effects of Zn2+ on the crystallization behavior, morphology and photoluminescence (PL) properties of GdTaO4∶Eu3+. The synthesized materials were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), PL excitation and emission spectra, decay time curves, etc. Results suggested that the co-doping of Zn2+ could remarkably improve the PL intensity of GdTaO4∶Eu0.1,and there were two maxima in the curve of Eu3+ PL intensity at 611 nm vs Zn2+doping concentration x. When x=0.01 the intensity was improved up to 2.7 times that of pure GdTaO4∶Eu3+,which could be attributed to the creation of oxygen vacancies for the charge neutrality and the alternation of the local environment of activator Eu3+ions resulting from the incorporation of Zn2+ ions; the other was enhanced up to 3.2 times at x=0.13 which was due to the flux effect of Zn2+ ions. But ZnO and GdTa7O19 were observed in an excessive Zn2+ doping range (x>0.13), which resulted in the decrease in the PL brightness and lengthening of decay time. Meanwhile, primary results indicated that the PL intensity of GdTaO4∶Eu0.1,Zn0.13 could be further strengthened by the co-doping of Li+ and K+ ions.
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Received: 2006-03-26
Accepted: 2006-06-28
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Corresponding Authors:
GU Mu
E-mail: muguk@online.sh.cn
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| Cite this article: |
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XIAO Li-hong,GU Mu,LIU Xiao-lin, et al. Effects of Zn2+ Doping on the Structural and Luminescent Properties of GdTaO4∶Eu3+ Phosphors [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(06): 1054-1057.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2007/V27/I06/1054 |
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