SO2-4/BO3-3掺杂对NaGd(MoO4)2:Eu3+荧光粉发光性能影响的研究

摘要

NaGd(MoO4 )2 : xEu3+ (x=10% ,20% ,30% ,40% ) and NaGd(MoO4 )2 :7% Eu3+ ,ySO2 -4 /BO3 -3 phosphors were prepared by hydrothermal method with sodium citrate as a surfactant .The crystal phase ,morphology and luminescent properties of the prepared samples were characterized . The results showed that the structures of NaGd (MoO4 )2 : xEu3+ and NaGd (MoO4 )2 :7% Eu3+ ,ySO2 -4 /BO3 -3 phosphors were tetragonal scheelite .The characteristic absorption peak of SO2 -4 /BO3 -3 was found by infrared spectroscopy ,indicating that SO2 -4 /BO3 -3 was successfully incorporated into the matrix .The emission spectrum of NaGd(MoO4 )2 : 30% Eu3+ was the strongest .Besides ,by studying the emission spectrum of NaGd (MoO4 )2 :7%Eu3+ ,ySO2-4 /BO3 -3 phosphors ,it can find that appropriate doping of SO2 -4 /BO3 -3 can enhance the characteristic emission intensity of Eu3+ .The addition of 10% SO2 -4 or 10% BO3 -3 can reduce the doping of Eu3+ by about 3% ,which can save the doping amount of rare earth .%采用柠檬酸钠为表面活性剂的水热法制备了NaGd(MoO4)2:xEu3+(x=10%,20%,30%,40%)和NaGd(MoO4)2:7%Eu3+,ySO2-4/BO3-3荧光粉,对所制备样品的晶相、形貌、发光性质进行了表征.XRD分析表明NaGd(MoO4)2:xEu3+和NaGd(MoO4)2:7%Eu3+,ySO2-4/BO3-3荧光粉均为四方相的白钨矿结构;红外光谱测试发现有SO2-4/BO3-3的特征吸收峰,这表明SO2-4/BO3-3被成功掺入基质;荧光光谱测试说明,在NaGd(MoO4)2基质中Eu3+掺杂量为30%时发光最强;通过研究NaGd(MoO4)2:7%Eu3+,ySO2-4/BO3-3荧光粉的发射光谱,发现适量的SO2-4/BO3-3掺杂会使Eu3+的特征发射增强,且掺杂10%SO2-4或10%BO3-3后可以减少3%左右的Eu3+掺杂,起到了节约稀土掺杂量的作用.