Filling of trap and green long persistent luminescence in Sr3Al2O5Cl2:Tb3+
Filling of trap and green long persistent luminescence in Sr3Al2O5Cl2:Tb3+
复制标题
DOI：
10.1016/j.optmat.2014.04.039
复制
发表时间：
2014-09
影响因子：
3.9
通讯作者：
Wenbo Chen;Yuhua Wang;Wei Zeng;Shaochun Han;Gen Li
中科院分区：
文献类型：
--
作者：
Wenbo Chen;Yuhua Wang;Wei Zeng;Shaochun Han;Gen Li
采用高温固相反应法合成了Tb 3+掺杂的Sr 3Al 2 O 5Cl 2荧光粉，并研究了其光致发光性能。Sr 3Al 2 O 5Cl 2：Tb 3+样品在Tb 3+的5D4 ~ 7 Fj（j= 6，5，4，3）跃迁发射绿色光。254 nm光照射5 min后，在黑暗中1h以上，肉眼可观察到明显的磷光（0.32mcd/m2）。热释光（TL）测量表明，TL发光曲线由位于62、142、250 °C的峰组成。通过改变辐照时间研究了陷阱的填充情况。此外，还讨论了长余辉的来源。
The Tb3+doped Sr3Al2O5Cl2phosphors have been synthesized via high temperature solid state reaction and their photoluminescence properties have been investigated. The Sr3Al2O5Cl2:Tb3+samples emit a green luminescence from5D4to7Fj(j= 6, 5, 4, 3) transition of Tb3+. The phosphorescence can be observed clearly by the naked eyes (0.32 mcd/m2) in the dark for over 1 h after 254 nm irradiation for the 5 min. Thermoluminescence (TL) measurements indicated that the TL glow curve was composed of the peaks located at 62, 142, 250 °C. The filling of traps was investigated by changing the irradiation time. Furthermore, the origin of long persistent luminescence has also been discussed.