Li^+掺杂ZnO基荧光粉的制备、性能研究及其表面包覆

Preparation,Performance and Surface Coated of Li^+ Doped ZnO Phosphor

采用草酸根沉淀法制备ZnO∶Eu3+荧光粉,探讨了Li+对Eu3+的敏化作用,并研究了SiO2的表面包覆对ZnO∶Eu3+,Li+荧光粉性能的影响。采用XRD、IR、SEM、PL等分析了样品的物相、形貌及发光性能。结果表明:Li+的掺杂能有效的增强Eu3+与ZnO之间的能量传递,提高其发光性能。而表面包覆SiO2使ZnO∶Eu3+,Li+荧光粉的晶粒间团聚减小,并对其激发光谱产生影响。

The phosphor of ZnO∶Eu3＋ was synthesized by oxalate precipitation method.The sensibilization of Li＋ and the effect of SiO2 coating on the properties of ZnO∶Eu3＋,Li＋ phospher was investigated.The phase composition,morphology and luminescent properties of the powders derived from the sintered precursor were characterized by XRD,IR,SEM and PL.The results show that the ability of transfer energy from ZnO to Eu3＋become better attribute to doping Li＋.The crystal particle of phosphors was separated by coating SiO2 and its excitation spectrum was affected.