SUN Xiao-yuan, ZHANG Jia-hua, ZHANG Xia, LUO Yong-shi, WANG Xiao-jun. Long Lasting Yellow Phosphorescence in Sr<sub>3</sub>SiO<sub>5</sub>:Eu<sup>2+</sup> and Sr<sub>3</sub>SiO<sub>5</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2008,29(4): 665-669
SUN Xiao-yuan, ZHANG Jia-hua, ZHANG Xia, LUO Yong-shi, WANG Xiao-jun. Long Lasting Yellow Phosphorescence in Sr<sub>3</sub>SiO<sub>5</sub>:Eu<sup>2+</sup> and Sr<sub>3</sub>SiO<sub>5</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2008,29(4): 665-669DOI:
phosphors have been synthesized through the solid-state reaction technique.We observed long lasting yellow phosphorescence in Sr
3
SiO
5
:Eu
2+
and Sr
3
SiO
5
:Eu
2+
Dy
3+
phosphors
originating from 4f
6
5d-4f
7
transition of Eu
2+
after UV exposure.The phosphorescence in Sr
3
SiO
5
:Eu
2+
can be observed by naked eyes for more than 4 hours after the termination of excitation light.The decay patterns of phosphorescence and thermoluminescence curves demonstrate that introduction of Dy
3+
into Sr
3
SiO
5
:Eu
2+
can generate lots of shallow traps and deep traps.The generated deep traps prolong the phosphorescence up to 6 hours after UV irradiation.The depths of traps are obtained by fitting the thermoluminescence experimental data to the general order kinetics formula.