| Influence of urea on microstructure and optical properties of YPO4：Eu^3＋ phosphors |
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| 引用本文： | 肖俊杰,高永毅,张杰,刘云新,杨奇斌. Influence of urea on microstructure and optical properties of YPO4：Eu^3＋ phosphors[J]. 中国稀土学报(英文版), 2012, 0(6): 515-519 |
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| 作者姓名： | 肖俊杰 高永毅 张杰 刘云新 杨奇斌 |
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| 作者单位： | Institute of Modern Physics,Xiangtan University;Department of Physics,Hunan University of Science and Technology |
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| 基金项目： | the National Natural Scientific Foundation of China(10874144);the Scientific Foundation of Education Department of Hunan Province,China(06C818) |
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| 摘 要： | YPO4:Eu 3+ phosphors were synthesized by solution coprecipitation method assisted by urea in the precursor reaction solution. X-ray diffraction spectral analysis showed that the samples synthesized with urea had smaller particle size and lower crystallinity than those samples synthesized without urea.Moreover,the calculated strain result indicated that the Eu 3+ site in the former exhibited a lower crystal field symmetry than that in the latter.Hence,the influence of crystal field symmetry dominated luminescence efficiency rather than crystallinity because the luminescence intensity observed in Eu0.05Y0.95PO4 synthesized with 1.0 g urea was six-fold higher than that of the as-synthesized sample.With increased concentration of Eu 3+ ion,the luminescence intensity initially increased,and then subsequently decreased as the concentration of Eu 3+ ion exceeded 12 mol.%due to concentration quenching.The optimal condition for YPO4:Eu 3+ phosphor was Eu0.12Y0.88PO4 with 1.0 g urea added in the precursor.The luminescence intensity of the optimal condition was again enhanced 1.6-fold relative to that of Eu0.05Y0.95PO4 synthesized with 1.0 g-urea.
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| 关 键 词： | Optical properties crystal structure optical materials X-ray diffraction rare earths |
Influence of urea on microstructure and optical properties of YPO4:Eu3+ phosphors |
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| XIAO Junjie,GAO Yongyi,ZHANG Jie,LIU Yunxin,YANG Qibin. Influence of urea on microstructure and optical properties of YPO4:Eu3+ phosphors[J]. Journal of Rare Earths, 2012, 0(6): 515-519 |
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| Authors: | XIAO Junjie GAO Yongyi ZHANG Jie LIU Yunxin YANG Qibin |
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| Affiliation: | 1 (1.Institute of Modern Physics,Xiangtan University,Xiangtan 411105,China;2.Department of Physics,Hunan University of Science and Technology,Xiangtan 411201,China) |
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| Abstract: | YPO4:Eu 3+ phosphors were synthesized by solution coprecipitation method assisted by urea in the precursor reaction solution. X-ray diffraction spectral analysis showed that the samples synthesized with urea had smaller particle size and lower crystallinity than those samples synthesized without urea.Moreover,the calculated strain result indicated that the Eu 3+ site in the former exhibited a lower crystal field symmetry than that in the latter.Hence,the influence of crystal field symmetry dominated luminescence efficiency rather than crystallinity because the luminescence intensity observed in Eu0.05Y0.95PO4 synthesized with 1.0 g urea was six-fold higher than that of the as-synthesized sample.With increased concentration of Eu 3+ ion,the luminescence intensity initially increased,and then subsequently decreased as the concentration of Eu 3+ ion exceeded 12 mol.%due to concentration quenching.The optimal condition for YPO4:Eu 3+ phosphor was Eu0.12Y0.88PO4 with 1.0 g urea added in the precursor.The luminescence intensity of the optimal condition was again enhanced 1.6-fold relative to that of Eu0.05Y0.95PO4 synthesized with 1.0 g-urea. |
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| Keywords: | Optical properties crystal structure optical materials X-ray diffraction rare earths |
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