Potential white-light long-lasting phosphor: Dy3+-doped aluminate
Potential white-light long-lasting phosphor: Dy3+-doped aluminate
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DOI：
10.1063/1.1925778
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发表时间：
2005-05-09
影响因子：
4
通讯作者：
Qi, ZM
中科院分区：
文献类型：
--
作者：
Liu, B;Shi, CS;Qi, ZM
制备并研究了CaAl 249/2O：Dy 3+长余辉白光荧光粉。在254或365 nm的照射下，白光余辉光谱由蓝光发射和黄光发射组成，其发射来自Dy~（3+）的4f（6 H）（，4F）（15/2）（9/2）（6 H）（13/2）（在4f）（9）组态中）的跃迁。当Dy掺杂浓度为2at. %.衰减曲线和热释光曲线表明是一个二级过程。热释光曲线在230 - 450 K范围内呈现出复杂的结构，峰位分别在244、280、310和346 K。在室温以上的两个热释光峰对应的陷阱深度为0.54和0.61 eV，这是负责在室温下的余辉发射。该研究为白光长余辉荧光粉的开发提供了一条有前途的途径。2005年美国物理学会。
The white-light long-lasting phosphor CaAl249/2O: Dy3+ was prepared and investigated. The white-light afterglow spectra under the irradiation of 254 or 365 nm are comprised of the blue light emission and the yellow light emission, originating from the transitions of 4F (6H)(, 4F)(15/2)(9/2) (6H)(13/2) (in the 4f)(9) configuration of Dy3+. The afterglow can last 32 min for the best sample with Dy-doped concentration of 2 at. %. The decay curve and the thermoluminescence curve show to be a second-order process. Thermoluminescence curves exhibit a complicated structure in the range of 230-450 K with the peaks at 244, 280, 310, and 346 K. The two thermoluminescence bands peaking above room temperature have corresponding traps with the depths of 0.54 and 0.61 eV, which are responsible for the afterglow emission at room temperature. This work provides a promising approach for the development of white-light long-lasting phosphor. 2005 American Institute of Physics.