溶胶-凝胶合成BaMoO_4∶Eu^(3+)荧光粉及发光性能研究  

Sol-gel Synthesis and Photoluminescent Properties of BaMoO_4∶Eu^(3+)Phosphors

作　　者：张建夫[1] 李可[1] 李伊光[1] 王振领 

机构地区：[1]周口师范学院化学系,周口466001 [2]周口市应用化学与精细化工工程技术研究中心,周口466001

出　　处：《人工晶体学报》2013年第8期1677-1680,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21171179):人力资源和社会保障部留学人员科技活动项目择优资助;河南省住房和城乡建设厅城市科学研究课题(20137612);周口师范学院应用化学重点学科资助

摘　　要：采用溶胶-凝胶法,通过改变煅烧温度、掺杂稀土离子的浓度合成以BaMoO4为基质的红色荧光粉。利用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见光谱(UV-Vis)、荧光光谱(PL)等技术对样品进行表征。结果表明,BaMoO4∶Eu3+荧光粉属四方晶系;BaMoO4∶Eu3+荧光粉在464 nm的紫外光激发下,其发射光谱由Eu3+的5D0-7F J(J=1,2,3,4)特征发射组成,在615 nm处的电偶极跃迁(5D0-7F2)最强,表现为Eu3+的橙-红特征发射;BaMoO4∶Eu3+荧光粉的最佳掺杂浓度为3%(摩尔比);Eu的光致发光衰减曲线符合单指数行为,其寿命(τ)为0.57 ms。A novel red light emitting phosphor based on molybdate was synthesized by sol-gol method. The structure and luminescent properties of these phosphors can be controlled through altering the reaction temperature and the doping concentration of rare earth ions, and characterized by X-ray diffraction （XRD） ,scanning electron microscopy（ SEM）, UV-Vis and photoluminescence （PL） spectra. The result of XRD showed that BaMoO4： Eu3＋ phosphors are belong to tetragonal crystal structure. Upon excitation into the Eu3＋ at 464 nm, the emission spectrum of BaMoO4： Eu3＋ phosphor is composed of 5Do-TFj（J = 1, 2, 3, 4） emission lines of Eu3＋, and the electric-dipole transition 5D0-TF2（615 nm） is dominant. This is characterized by orange-red emission. The optimum doping concentration of Eu3＋ is 5% （molar fraction） in the BaMoO4： Eu3 ＋ phosphor. The luminescence decay curve of BaMoO4： Eu3＋ phosphor show single-exponential behavior, and the lifetime （τ） is about 0.57 ms.

关 键 词：BAMOO4 溶胶-凝胶法 荧光粉 

分 类 号：O482.31[理学—固体物理]