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Monoclinic LnPO 4 :Tb,Bi (Ln=La,Gd) phosphors were prepared by hydrothermal reaction and their luminescent properties under ultraviolet (UV) and vacuum ultraviolet (VUV) excitation were investigated. LaPO 4 :Tb,Bi phosphor and GdPO 4 :Tb phosphor showed the strongest emission intensity under 254 and 147nm excitation, respectively, because of the different energy transfer models...
Tb doped LnPO 4 (Ln=La, Gd) phosphors with monoclinic system were successfully prepared by mild hydrothermal reaction at 240°C. The 543nm emission of Tb 3+ in GdPO 4 is higher than in LaPO 4 . By comparison, it is found that the intensity of host absorption band of GdPO 4 :Tb is higher than that of LaPO 4 :Tb which is ascribed to the energy transfer...
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