| Photoluminescence properties of Y_(0.75-x)Gd_xAl_(0.10)BO_3:Eu_(0.10)~(3+),0.05R~(3+)(R= Sc,Bi) (0.00 ≤ x ≤ 0.45) |
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| 作者姓名： | 李杰 王育华 董其铮 刘吉地 |
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| 作者单位： | Department of Material Science, School of Physics Science and Technology, Lanzhou University, Lanzhou 730000, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Grant No. 10874061）, the Doctoral Program Foundation of Institutions of Higher Education of China （Grant No. 20040730019）, and the Project of the Combination of Industry and Research by the Ministry of Education and Guangdong Province of China （Grant No. 0712226100023）. |
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| 摘 要： | Y 0.75 -x Gd x Al 0.10 BO 3 :Eu0.10 3+, 0.05R 3+ (R=Sc, Bi) (0.00 ≤ x ≤ 0.45) powder samples are prepared by solid-state reaction and their luminescence properties are investigated. With the replacement of Y 3+ ions by Sc 3+ (or Bi 3+ ) and Gd 3+ ions in (Y,Al)BO 3 :Eu, the intensities of emission at 254 and 147 nm are remarkably improved, because Sc 3+ ions can absorb UV light and transfer the energy to Eu 3+ ions efficiently. Moreover, Gd 3+ and Bi 3+ ions act as an intermediate "bridge" between the sensitizer and the activator (Eu 3+ ) in energy transfer to produce light in the (Y, Gd)BO 3 :Bi 3+ , Eu 3+ system more effectively. After doping an appropriate concentration of Gd 3+ into Y 0.50 Gd 0.25 Al 0.10 BO 3 :Eu0.01 3+ , Bi0.05 3+ , the emission intensity reaches its maximum, which is nearly 110% compared with the red commercial phosphor (Y,Gd)BO 3 :Eu and better chromaticity coordinates (0.650, 0.350) are obtained.
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| 关 键 词： | Sc 3+ Bi 3+ Gd 3+ luminescence intensity chromaticity |
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