Luminescence and Microstructural Features of Eu-Activated LiBaPO4 Phosphor
Luminescence and Microstructural Features of Eu-Activated LiBaPO4 Phosphor
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DOI：
10.1021/cm102854p
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发表时间：
2011-01
影响因子：
8.6
通讯作者：
Suyin Zhang;Y. Nakai;T. Tsuboi;Yanlin Huang;H. Seo
中科院分区：
文献类型：
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作者：
Suyin Zhang;Y. Nakai;T. Tsuboi;Yanlin Huang;H. Seo
采用传统的固相反应法合成了Eu 2+激活的LiBaPO 4荧光粉。研究了磷光体的光致发光激发和发射光谱、随温度变化的发光强度（12−450 K）和衰减曲线。随着温度的升高，LiBaPO 4：Eu 2+的发光峰出现异常蓝移，发光强度降低。报道了LiBaPO 4中Eu ~（2+）发光的性质，如发光猝灭温度、热猝灭激活能（ΔE）等。在LiBaPO 4：Eu 2+荧光粉中检测到余辉荧光。在Eu ~（2+）发光的同时，还观察到了具有反常晶场的Eu ~（3+）离子。利用脉冲可调谐窄带染料激光器研究了Eu 3+离子在LiBaPO 4中5D 0 → 7 F0区的择位激发、发射光谱和衰减曲线，并对Eu 3+，2+在Ba 2+位的微结构和晶体学环境进行了研究.多个网站…
Eu2+-activated LiBaPO4 phosphor was synthesized by conventional solid-state reaction. The photoluminescence excitation and emission spectra, the temperature dependent luminescence intensities (12−450 K), and decay curves of the phosphor were investigated. With the increasing of temperatures, the emission bands of LiBaPO4:Eu2+ show the abnormal blue-shift and the decreasing of emission intensity. The natures of the Eu2+ emission in LiBaPO4, for example, the luminescence quenching temperature, and the activation energy for thermal quenching (ΔE), were reported. The afterglow fluorescence was detected in LiBaPO4:Eu2+ phosphor. Together with the Eu2+ luminescence, Eu3+ ions with the abnormal crystal field were observed. The site-selective excitation in the 5D0 → 7F0 region for Eu3+ ions, emission spectra, and decay curves have been investigated using a pulsed, tunable, and narrowband dye laser to detect the microstructure and crystallographic surrounding of Eu3+,2+ at Ba2+ sites in LiBaPO4. The multiple sites...