| 光谱学与光谱分析 |
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| Synthesis and Fluorescence of KZnF3∶Ce3+,Tb3+ Nanoparticles |
| ZHU Guo-xian1,2,3,LI Yong-da1,YAN Jing-hui1,SHI Chun-shan3 |
1. College of Science,Changchun University of Science and Technology，Changchun 130022,China
2. School of Chemistry Science and Technology,Zhanjiang Normal College,Zhanjiang 524048,China
3. Key Laboratory of Rare Earth Chemistry and Physics,Chinese Academy of Sciences,Changchun 130022,China |
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Abstract Phosphors of KZnF3∶Ce3+,KZnF3∶Tb3+ and KZnF3∶Ce3+,Tb3+ nanoparticles were synthesized in a cetyltrimethylammonium bromide (CTAB)/2-octanol/water microemulsion system. X-ray diffraction (XRD) pattern was used to identify the formation of KZnF3 phase without detectable impurity. Environment scanning electron microscopy (ESEM) image showed that the average sizes of the KZnF3∶Ce3+,Tb3+ nanocrystals were 30 nm in diameter. Photoluminescence characteristics of the rare earth ions doped nanoparticles were investigated and compared with that of the sample prepared by solid state reaction at a high temperature. The emission peak of the KZnF3∶Ce3+ nanoparticles showed an obvious red shift as compared to that of polycrystalline powder. In a co-doped system of KZnF3 nanoparticles,the emission band of Ce3+ even could hardly be observed and the luminescence intensity of Tb3+ was increased much compared with that Tb-doped singly. This showed that the emission of the Tb3+ was sensitized by Ce3+. The experimental results indicated that there was an effective energy transfer from Ce3+ to Tb3+ in KZnF3 nanoparticles.
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Received: 2006-11-06
Accepted: 2007-02-16
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Corresponding Authors:
ZHU Guo-xian
E-mail: zhugxian@163.com
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