Luminescent performance of rare earths doped CaBi2Ta2O9 phosphor
来源期刊：Journal of Rare Earths2013年第6期
论文作者：崔瑞瑞 邓朝勇 龚新勇 李绪诚 周剑平
文章页码：546 - 550
摘 要：A series of red-emitting phosphors of CaBi2Ta2O9:Pr3+ and CaBi2Ta2O9:Eu3+ were synthesized by the solid-state reaction method.The crystal structure and photoluminescence properties were investigated by X-ray diffraction （XRD） and photoluminescence spectra.The emission spectra showed that the red emission peaks were located at 622 nm for Pr3+ and 615 nm for Eu3+,respectively.The optimal doping concentrations for Ca1-xBi2Ta2O9:xPr3+ and Ca1-yBi2Ta2O9:yEu3+ were x=0.02 and y=0.15,respectively.The effect of fluxes （H3BO3,NH4F,CaCl2 and CaF2） and charge compensations （Li2CO3,Na2CO3 and K2CO3） on luminescent properties were investigated in detail.It was found that the relative emission intensity of Ca0.98Bi2Ta2O9:0.02Pr3+ with 10 mol.% H3BO3 flux was about 2.9 times higher than that of the sample without flux.The relative emission intensity of Ca0.7Bi2Ta2O9:0.15Eu3+,0.15K+ was about the 2.1 times higher than that of Ca0.85Bi2Ta2O9:0.15Eu3+.
崔瑞瑞1，邓朝勇1，龚新勇1，李绪诚1，周剑平2
1. Key Laboratory of Functional Composite Materials of Guizhou Province,Department of Electronic Science,College of Science,Guizhou University2. College of Physics and Information Technology,Shannxi Normal University
摘 要：A series of red-emitting phosphors of CaBi2Ta2O9:Pr3+ and CaBi2Ta2O9:Eu3+ were synthesized by the solid-state reaction method.The crystal structure and photoluminescence properties were investigated by X-ray diffraction （XRD） and photoluminescence spectra.The emission spectra showed that the red emission peaks were located at 622 nm for Pr3+ and 615 nm for Eu3+,respectively.The optimal doping concentrations for Ca1-xBi2Ta2O9:xPr3+ and Ca1-yBi2Ta2O9:yEu3+ were x=0.02 and y=0.15,respectively.The effect of fluxes （H3BO3,NH4F,CaCl2 and CaF2） and charge compensations （Li2CO3,Na2CO3 and K2CO3） on luminescent properties were investigated in detail.It was found that the relative emission intensity of Ca0.98Bi2Ta2O9:0.02Pr3+ with 10 mol.% H3BO3 flux was about 2.9 times higher than that of the sample without flux.The relative emission intensity of Ca0.7Bi2Ta2O9:0.15Eu3+,0.15K+ was about the 2.1 times higher than that of Ca0.85Bi2Ta2O9:0.15Eu3+.
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