Eu^(3+)掺杂的钼酸盐微纳米材料制备和光致发光性能研究  

Preparation and photoluminescence of Eu^(3+) doped molybdate micro/nano material

作　　者：张现峰 柴刘成 张明虎 许浩文 Zhang Xianfeng;Chai Liucheng;Zhang Minghu;Xu Haowen(School of Material and Chemical Engineering,Bengbu University,Bengbu 233030)

机构地区：[1]蚌埠学院材料与化学工程学院,蚌埠233030

出　　处：《化工新型材料》2019年第1期128-131,135,共5页New Chemical Materials

基　　金：国家自然科学基金(21503004);安徽省高校优秀青年人才支持计划重点项目(gxyqZD2016357);安徽省自然科学基金(1508085QB32);国家级大学生创新创业训练计划项目(201511305022)

摘　　要：分别采用沉淀法和水热法成功制备了Y_2(MoO_4)_3∶Eu^(3+)红色荧光粉,使用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)和荧光光谱对其物相结构、形貌和发光性能进行表征。结果表明:Eu^(3+)含量低于20%(摩尔分数,下同)不会改变Y_2(MoO_4)_3的晶体结构;沉淀法得到荧光粉呈花状,而水热法主要得到层层堆积结构的荧光粉;所制荧光粉的主激发峰和发射峰分别位于394和614nm,这是来自掺杂Eu^(3+)的f-f电子跃迁。Y_2(MoO_4)_3荧光粉中Eu^(3+)最佳摩尔分数为20%,当Eu^(3+)含量大于20%时,出现浓度猝灭现象,其5D_0→7F_2发光浓度猝灭机理是电偶极-电偶极相互作用。Y2(MoO4)3∶Eu3+red phosphors were successfully prepared by hydrothermal method and coprecipitation method,and the phase structures,morphology and luminescence properties were characterized by using X-ray powder diffraction(XRD),scanning electron microscopy(SEM)and fluorescence spectrometry.The results of XRD and SEM showed that the crystal structure of Y2(MoO4)3 did not change with the concentration of Eu3+below 20 mol%,and the phosphor powder with flower shape was mainly obtained by coprecipitation method,while phosphor powder with layer by layer structure was mainly obtained by hydrothermal method.Fluorescence spectra showed that the main excitation peaks and emission peaks of resultant phosphors were located at 394 nm and 614 nm,respectively,which was the f-f electron transition from doped Eu^3+.The optimal doping concentration of Eu^3+was 20%.When the doping concentration was more than 20%,the concentration quenching effect occured.The concentration quenching of 5D0→7F2 was caused by the interaction of electric dipole-electric dipole of Eu3+according to Dexter theory.

关 键 词：钼酸钇 红色荧光粉 浓度猝灭 沉淀法和水热法 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ422[化学工程]