Eu2＋ and （or） Eu3＋ doped Sr2SiO4 phosphors particles were synthesized by a conventional solid-state reaction technique, and their structural and optical properties were investigated. The X-ray diffraction （XRD） ...Eu2＋ and （or） Eu3＋ doped Sr2SiO4 phosphors particles were synthesized by a conventional solid-state reaction technique, and their structural and optical properties were investigated. The X-ray diffraction （XRD） results showed that the obtained phosphors were composed of orthorhombic α′-Sr2SiO4 and monoclinic β-Sr2SiO4 phase. When excited under 256 nm, Sr2SiO4：Eu3＋ phosphors showed intense emission in the red region. Sr2SiO4：Eu3＋ phosphors exhibited white emissions （x=0.30, y=0.40, Tc=6500 K） ranging from 425 to 650 nm when it was excited by near-ultraviolet （near-UV） light, indicating that Sr2SiOn：Eu2＋ was a good light-conversion phosphor candidate for near-UV chip.展开更多
The green long-after-glow luminescence from Tb3＋-doped Sr2SiO4 phosphors, which are synthesized by the high temperature solid state reaction in a reductive atmosphere, is observed in this paper. The results show that...The green long-after-glow luminescence from Tb3＋-doped Sr2SiO4 phosphors, which are synthesized by the high temperature solid state reaction in a reductive atmosphere, is observed in this paper. The results show that under ultraviolet excitation, the obtained phosphors produce an intense green-lighting-emission from the Tb3＋, and the green-lighting long- after-glow luminescence related to Tb3＋ can last half an hour after the irradiation source has been removed. Moreover, the effects of co-doping Li＋, Dy3＋, Er3＋, Gd3＋, and Yb3＋ with Tb3＋ on the decay properties and thermoluminescence properties are investigated to confirm the long-after-glow mechanism.展开更多
基金supported by the grants from the Natural Science Foundation of Zhejiang Province (Y406309)Research Program from Science and Technology Bureau of Jinhua City (2008-1-151)
文摘Eu2＋ and （or） Eu3＋ doped Sr2SiO4 phosphors particles were synthesized by a conventional solid-state reaction technique, and their structural and optical properties were investigated. The X-ray diffraction （XRD） results showed that the obtained phosphors were composed of orthorhombic α′-Sr2SiO4 and monoclinic β-Sr2SiO4 phase. When excited under 256 nm, Sr2SiO4：Eu3＋ phosphors showed intense emission in the red region. Sr2SiO4：Eu3＋ phosphors exhibited white emissions （x=0.30, y=0.40, Tc=6500 K） ranging from 425 to 650 nm when it was excited by near-ultraviolet （near-UV） light, indicating that Sr2SiOn：Eu2＋ was a good light-conversion phosphor candidate for near-UV chip.
基金supported by the National Natural Science Foundation of China(Grant Nos.51272097,61265004,and 61265007)
文摘The green long-after-glow luminescence from Tb3＋-doped Sr2SiO4 phosphors, which are synthesized by the high temperature solid state reaction in a reductive atmosphere, is observed in this paper. The results show that under ultraviolet excitation, the obtained phosphors produce an intense green-lighting-emission from the Tb3＋, and the green-lighting long- after-glow luminescence related to Tb3＋ can last half an hour after the irradiation source has been removed. Moreover, the effects of co-doping Li＋, Dy3＋, Er3＋, Gd3＋, and Yb3＋ with Tb3＋ on the decay properties and thermoluminescence properties are investigated to confirm the long-after-glow mechanism.
