Synthesis and luminescent properties of a new phosphor, La2CaB8O16:RE3+ (RE = Eu, Tb)

Synthesis and luminescent properties of a new phosphor, La2CaB8O16:RE3+ (RE = Eu, Tb)
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新型荧光粉La2CaB8O16:RE3(RE=Eu、Tb)的合成及发光性能

DOI:
10.1016/j.jallcom.2012.10.077
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发表时间:
2013-02
影响因子:
6.2
通讯作者:
Tan, Dunqiang
Tan, Dunqiang
中科院分区:
材料科学2区
文献类型:
--
作者:
Tang, Songling;Zheng, Feng;Yang, Zhenyu;Tan, Dunqiang

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采用固相反应法合成了一种新的硼酸盐发光材料La_2CaB_8O_(16):RE ~(3+)(RE=Eu,Tb)。利用Eu ~(3+)的室温和低温荧光光谱确定了La_2CaB_8 O_(16)中掺杂离子的局域晶格环境。研究了稀土离子掺杂La_2CaB_8O_(16)的发光性能。La_2CaB_8 O_(16)中Eu ~(3+)的主要发射位于616 nm处,对应于电偶极跃迁5D_0 - 7 F_2,而La_2CaB_8 O_(16):Tb ~(3+)的绿色发射位于544 nm处,对应于电偶极跃迁5D_4 - 7 F_5。发光强度的浓度依赖性表明,Eu ~(3+)和Tb ~(3+)的最佳掺杂浓度分别为30mol%和15mol%。
A new borate phosphor, La2CaB8O16:RE3+(RE=Eu, Tb) has been synthesized by solid-state reaction method. The local lattice environment of doping ions in La2CaB8O16has been determined by use of the room temperature and low temperature fluorescence spectra of Eu3+. The luminescent properties of RE3+-doped La2CaB8O16have been investigated. The dominant emission of Eu3+in La2CaB8O16is located at 616nm corresponding to the electric dipole transition5D0–7F2, while the green emission of La2CaB8O16:Tb3+attributed to the transition5D4–7F5is centered at 544nm. The concentration dependence of the emission intensity shows that the optimum doping concentrations of Eu3+and Tb3+are 30mol% and 15mol%, respectively.
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