Photoluminescence properties of GdBa3B9O18:Ln3+ (Ln = Eu, Tb) under UV and VUV excitation
Photoluminescence properties of GdBa3B9O18:Ln3+ (Ln = Eu, Tb) under UV and VUV excitation
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DOI：
10.1016/j.jallcom.2006.11.128
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发表时间：
2008-04-03
影响因子：
6.2
通讯作者：
Chen, Zhong
中科院分区：
文献类型：
--
作者：
Li, Xiao Xia;Wang, Yu Hua;Chen, Zhong
采用固相反应法制备了单相Gd0.95Eu0.05Ba3B9O18和Gd0.95Tb0.05Ba3O18。研究了它们在紫外光和真空紫外光激发下的光致发光特性。结果表明，Gd0.95Eu0.05Ba3B9O18和Gd0.95Tb0.05Ba3B9O18在紫外区的激发光谱主要由Eu3+的电荷转移激发带和Tb3+的4f(7)5d(1)跃迁引起。在真空紫外区观察到基质晶格吸收带较宽，最大吸收波长在165 nm左右，主要由BO_3基团和BaO基团的吸收组成。在254和147 nm激发下，Gd0.95Eu0.05Ba3B9O18和Gd0.95Eu0.05Ba3B9O18分别在592和541 nm处出现红光和绿光发射。(C)2006爱思唯尔B.V.保留所有权利。
The single phase of Gd0.95Eu0.05Ba3B9O18 and Gd0.95Tb0.05Ba3O18 was prepared by the solid-state reaction. Their photoluminescence properties were investigated under ultraviolet and vacuum ultraviolet excitation. The results indicated that the charge transfer excitation band of Eu3+, and 4f(8) -> 4f(7)5d(1) transitions of Tb3+ dominated the excitation spectra of Gd0.95Eu0.05Ba3B9O18 and Gd0.95Tb0.05Ba3B9O18 in ultraviolet region, respectively. The broad band of the host lattice absorption with maximum at about 165 nm was observed in vacuum ultraviolet region, which could consist of the absorptions of BO3 groups and Ba-O groups. Under 254 and 147 nm excitation, Gd0.95Eu0.05Ba3B9O18 and Gd0.95Eu0.05Ba3B9O18 showed red and green emission peaking at about 592 and 541 nm, respectively. (c) 2006 Elsevier B.V. All rights reserved.