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A series of Tb-doped solid solutions PbGd_(1-x)Tb_xB_7O_(13)(x = 0~1) were synthesized by high-temperature solid state reaction method. The luminescence properties were investigated under UV(274 nm) and near-UV(372 nm) excitation. The emission spectrum by 274 nm exciting reveals a charge-transfer between Gd~(3+) and Tb~(3+) ions. Under near-UV light(372 nm) excitation, PbGd_(1-x)Tb_xB_7O_(13):x Tb~(~(3+)) exhibits intense green emission centered at 543 nm due to the ~5D_4→~7F_5 transition of Tb~(3+) activator. The optimum doping concentrations were found to be x = 0.8 with the quantum efficiency of 35%. One may expect that PbGd_(1-x)Tb_xB_7O_(13) has the potential to be used as a green phosphor activated by near near-UV light. 相似文献
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