Luminescence, energy transfer and tunable color of Ce3+,Dy3+/Tb3+ doped BaZn2(PO4)2 phosphors
Luminescence, energy transfer and tunable color of Ce3+,Dy3+/Tb3+ doped BaZn2(PO4)2 phosphors
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Ce3 、Dy3 /Tb3 掺杂 BaZn2(PO4)2 荧光粉的发光、能量转移和可调颜色
DOI：
10.1039/c5nj03148f
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发表时间：
2016-01-01
影响因子：
3.3
通讯作者：
Jia, Dianzeng
中科院分区：
文献类型：
--
作者：
Wang, Luxiang;Xu, Mengjiao;Jia, Dianzeng
采用高温固相反应法制备了Ce 3+、Dy 3+和Tb 3+掺杂的BaZn 2（PO 4）2荧光粉。研究了其晶体结构、光致发光性能、衰减寿命、发光效率和热稳定性。根据荧光粉的光致发光光谱和衰减曲线，确定了Ce 3 +-Dy 3 +/Tb 3+能量传递的机理为偶极-偶极相互作用。用浓度猝灭法和光谱重叠法计算了Ce ~（3+）和Dy ~（3+）/Tb ~（3+）离子的临界距离。在紫外光照射下，通过能量转移和改变Dy 3+和Tb 3+的掺杂浓度，可以实现从蓝色到蓝白色和绿色的可调谐发光。BaZn 2（PO 4）2：Ce 3+，Dy 3 +/Tb 3+荧光粉具有优异的热稳定性和发光性能，在照明领域有着广阔的应用前景。
Ce3+,Dy3+ and Tb3+ doped BaZn2(PO4)2 phosphors were prepared via a high temperature solid state reaction route. The crystal structure, photoluminescence properties, decay lifetime, luminous efficiency and thermal stability of the phosphors were investigated. The mechanism of Ce3+–Dy3+/Tb3+ energy transfer was determined to be a dipole–dipole interaction based on the photoluminescence spectra and decay curves of the phosphors. The critical distance between the Ce3+ and Dy3+/Tb3+ ions was calculated using both the concentration quenching method and the spectral overlap method. Tunable emission from blue to bluish white and green can be realized by energy transfer and changing the doping concentrations of Dy3+ and Tb3+ under UV light. BaZn2(PO4)2:Ce3+,Dy3+/Tb3+ phosphors are proved to be promising candidates in the lighting field due to their excellent thermal stability and luminescence properties.