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采用共沉淀法合成了微米花状,四方晶系的NaLa(MoO4)2∶Eu3+红色荧光粉。利用X射线衍射仪、扫描电子显微镜、光致发光光谱等分析手段对样品的结构、形貌以及发光性能进行了表征。研究了结构控制剂种类、聚乙烯吡咯烷酮(PVP)添加量、Eu3+掺杂浓度、反应物浓度等系列对合成NaLa(MoO4)2∶Eu3+发光材料发光性能的影响。结果表明:所合成的微米花状NaLa(MoO4)2∶Eu3+红色荧光粉为四方晶系,在464nm紫外激发下,观察到其发射主峰位置在615nm。当反应条件分别为PVP=0.75g、Eu3+掺杂浓度10%、反应物浓度为0.12mol/L时样品具有最强的发光强度。在紫外灯照射下,样品呈现出明亮的红色。
The micron flower-like tetragonal NaLa (MoO4) 2Eu3 + red phosphor was synthesized by co-precipitation method. The structure, morphology and luminescent properties of the samples were characterized by X-ray diffraction, scanning electron microscopy and photoluminescence spectroscopy. The effect of the kinds of structure control agents, PVP addition, Eu3 + doping concentration and reactant concentration on the luminescent properties of the synthesized NaLa (MoO4) 2:Eu3 + phosphors was studied. The results show that the luminescent NaLa (MoO4) 2Eu3 + red phosphor is tetragonal, and the emission peak at 615nm is observed under UV excitation at 464nm. When the reaction conditions were PVP = 0.75g, Eu3 + doping concentration of 10%, the reactant concentration of 0.12mol / L when the sample has the strongest luminous intensity. The sample showed a bright red color when irradiated with UV light.