Luminescence of NaGdF4:Tb3+, Eu3+ under vacuum ultraviolet excitation
Luminescence of NaGdF4:Tb3+, Eu3+ under vacuum ultraviolet excitation
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DOI：
10.1016/j.jallcom.2005.01.102
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发表时间：
2006-02
影响因子：
6.2
通讯作者：
T. Hirai;N. Ohno;S. Hashimoto;S. Sakuragi
中科院分区：
文献类型：
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作者：
T. Hirai;N. Ohno;S. Hashimoto;S. Sakuragi
研究了NaGdF_4：Tb ~（3+），Eu ~（3+）的发光和激发光谱。发光光谱由Tb ~（3+）和Eu ~（3+）离子的f-f跃迁发光谱线组成。在Eu ~（3+）离子614 nm的激发光谱中，在160 ~ 210 nm的真空紫外（VUV）光谱范围内观察到Tb ~（3+）离子f-d跃迁的激发带。结果表明，用Y ~（3+）取代Gd ~（3+）后，Eu ~（3+）离子的发光强度比Tb ~（3+）离子的发光强度减弱。Eu ~（3+）离子的发光随温度的降低而减弱。在此基础上，讨论了真空紫外激发下NaGdF_4：Tb ~（3+），Eu ~（3+）的能量转移过程。
Luminescence and excitation spectra of NaGdF4:Tb3+, Eu3+have been investigated. The luminescence spectrum consists of the luminescence lines originating from the f–f transition of Tb3+and Eu3+ions. In the excitation spectrum for the luminescence line of Eu3+ions at 614nm, excitation bands arising from the f–d transition of Tb3+ions are observed in the vacuum ultraviolet (VUV) spectral region ranging from 160 to 210nm. It is found that, by replacing Gd3+with Y3+, the intensities of the luminescence lines from Eu3+ions weaken compared to those from Tb3+ions. The luminescence of Eu3+ions is found to weaken with decreasing temperature. On the basis of the present results, we discuss the energy transfer process in NaGdF4:Tb3+, Eu3+under the VUV excitation.