Luminescent properties and energy transfer mechanism from Tb~(3+) to Eu~(3+) in CaMoO_4:Tb~(3+),Eu~(

来源 :Journal of Rare Earths | 被引量 : 0次 | 上传用户:siman2008
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A series of CaMoO_4:Tb~(3+),Eu~(3+) phosphors were prepared by the method of precipitation. The structure and morphology of the phosphors were characterized by the X-ray diffraction(XRD) and field emission scanning electron microscopy(FE-SEM). The photoluminescence properties of the prepared products were researched, and the energy transfer from Tb~(3+) to Eu~(3+) in CaMoO_4 phosphors was studied. By adjusting the doping concentration of Eu~(3+) ions in CaMoO_4:Tb~(3+),Eu~(3+) phosphors, the emitting color of the phosphors could be easily tuned from green to red. With Tb~(3+) doped in the phosphors, the red luminescence of Eu~(3+) by near UV excitation was significantly enhanced. The energy transfer efficiency, rate and average distance between Tb~(3+) and Eu~(3+) in CaMoO_4:5%Tb~(3+),x%Eu~(3+)(mole percent) phosphors(x=0.3–10) were calculated. It was found that the interaction type between Tb~(3+) and Eu~(3+) was electric dipole-dipole interaction in the phosphors. A series of CaMoO_4: Tb ~ (3 +), Eu ~ (3+) phosphors were prepared by the method of precipitation. The structure and morphology of the phosphors were characterized by the X-ray diffraction (XRD) and field emission scanning electron The photoluminescence properties of the prepared products were researched, and the energy transfer from Tb ~ (3+) to Eu ~ (3+) in CaMoO_4 phosphors was studied. By adjusting the doping concentration of Eu ~ ( 3+) ions in CaMoO_4: Tb ~ (3 +), Eu ~ (3+) phosphors, the emitting color of the phosphors could be easily tuned from green to red. With Tb ~ (3+) doped in the phosphors, the The energy transfer efficiency, rate and average distance between Tb ~ (3+) and Eu ~ (3+) in CaMoO_4: 5% Tb ~ (3+) It was found that the interaction type between Tb ~ (3+) and Eu ~ (3+) was electric dipole- dipole interaction in the phosphors.
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