Realizing emission color tuning, ratiometric optical thermometry and temperature-induced redshift investigation in novel Eu3 -doped Ba3La(VO4)(3) phosphors
Realizing emission color tuning, ratiometric optical thermometry and temperature-induced redshift investigation in novel Eu3 -doped Ba3La(VO4)(3) phosphors
复制标题
实现新型 Eu3 掺杂 Ba3La(VO4)(3) 荧光粉的发射颜色调谐、比率光学测温和温度诱导红移研究
DOI：
10.1039/c9dt01917k
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发表时间：
2019
影响因子：
4
通讯作者：
Zhou Xianju
中科院分区：
文献类型：
--
作者：
Yang Peixin;Li Li;Deng Yongsen;Wang Yongjie;Jiang Sha;Luo Xiaobing;Xiang Guotao;Lu Yi;Zhou Xianju
首次探索了稀土掺杂的发光颜色可调的Ba3La(VO4)3荧光粉，并系统地研究了其光致发光特性。实验结果表明，Ba3La(VO4)3荧光粉具有高亮度的自激活发光，使我们能够敏化稀土激活剂的发光。在近紫外(UV)激发下，在Ba3La(VO4)3：Eu3+荧光粉中观察到了Vo43−基团的宽带发射和Eu3+离子的尖峰发射。通过调整Eu3+的掺杂浓度，可以实现发光颜色从绿色到红色的调制，这被指定为从Vo43−到Eu3+离子的有效能量转移。值得注意的是，Ba3La(VO4)3：Eu3+的光学测温是基于VO43−和Eu3+在298K-573K发射的荧光强度比来表征的，298K时的最大绝对和相对灵敏度分别为0.0515 K−1和1.77%K−1。此外，在Sm 3+和Dy3+掺杂的Ba3La(Vo4)3荧光粉中也观察到了类似的现象。这些结果验证了通过调节主体和激活剂之间的能量传递来改变单组分荧光粉的发射颜色和实现光学测温的可行策略。它为白光发光二极管和非接触式测温多功能材料的设计提供了新的可能性。
Rare earth-doped Ba3La(VO4)3 phosphors with tunable emitting colors were firstly explored and their photoluminescence properties were systematically investigated. The experimental results show that the Ba3La(VO4)3 phosphors exhibit high-brightness self-activated emission and enable us to sensitize the luminescence of rare earth activators. Under near-ultraviolet (UV) excitation, both the broadband emission from VO43− groups and the sharp peak emissions from Eu3+ ions are observed in Ba3La(VO4)3:Eu3+ phosphors. Modulation of the emitting color from green to red can be realized by adjusting the Eu3+ doping concentration, which is assigned to an efficient energy transfer from VO43− to Eu3+ ions. Notably, the optical thermometry of Ba3La(VO4)3:Eu3+ was characterized based on the fluorescence intensity ratio of VO43− and Eu3+ emissions in the 298–573 K range, with the maximum absolute and relative sensitivities of 0.0515 K−1 and 1.77% K−1 at 298 K. In addition, similar phenomena were observed in Sm3+ and Dy3+-doped Ba3La(VO4)3 phosphors. These results verify a feasible strategy for varying the emission color and realizing optical thermometry in the single-component phosphors by adjusting the energy transfer between the host and the activator. It provides new possibilities for the design of multifunctional materials for white light-emitting diodes and non-contact thermometry.