The Energy Transfer and Thermal Stability of a Blue-Green Color Tunable K2CaP2O7:Ce3+,Tb3+ Phosphor
The Energy Transfer and Thermal Stability of a Blue-Green Color Tunable K2CaP2O7:Ce3+,Tb3+ Phosphor
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蓝绿色可调K2CaP2O7:Ce3,Tb3荧光粉的能量传输和热稳定性
DOI：
10.1111/jace.14470
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发表时间：
2017-01-01
影响因子：
3.9
通讯作者：
Zhou, Rui
中科院分区：
文献类型：
--
作者：
Ding, Yi;Wang, Luxiang;Zhou, Rui
采用固相反应法合成了Ce 3+和Tb 3+激活的K2 CaP 2 O 7（KCPO）蓝绿色发光材料。X射线衍射，发光光谱，衰减时间，和荧光热稳定性测试已被用来表征所制备的样品。KCPO：Ce ~（3+），Tb ~（3+）的发光光谱显示出Ce ~（3+）离子的宽带和Tb ~（3+）离子跃迁的特征线（D-5（4）-F-7（5））。通过调节KCPO：Ce 3+中Tb 3+的含量，可以得到在紫外光激发下从蓝色到绿色的颜色变化。此外，Ce ~（3+）离子通过有效的能量传递过程增强了Tb ~（3+）离子的发射，衰减曲线证实了这一点。能量转移效率确定为82.51%。通过偶极-四极相互作用的共振型机制可以提出能量转移。KCPO：Ce 3+，Tb 3+荧光粉在77 ~ 673 K范围内表现出优异的发光性能，是一种很有潜力的固体发光材料。
Novel blue-green emitting Ce3+- and Tb3+-activated K2CaP2O7 (KCPO) luminescent materials were synthesized via a solid-state reaction method. X-ray diffraction, luminescence spectroscopy, decay time, and fluorescent thermal stability tests have been used to characterize the prepared samples. The KCPO:Ce3+,Tb3+ luminescence spectra show broad band of Ce3+ ions and characteristic line of Tb3+ ion transition (D-5(4)-F-7(5)). The color variation in the light emitting from blue to green under UV excitation can be obtained by tailoring the Tb3+ content in KCPO:Ce3+. Besides, Ce3+ ions obviously intensify Tb3+ ion emission through an effective energy transfer process, which was confirmed from decay curves. The energy transfer efficiency was determined to be 82.51%. A resonant type mechanism via the dipole-quadrupole interaction can be proposed for energy transfer. As a whole, the KCPO:Ce3+,Tb3+ phosphor exhibits excellent performance in the range from 77 to 673 K, indicating the phosphors are highly potential candidates for solid-state lighting.