全文下载：2012030221
韩荣江， 高丹， 陈克正
（青岛科技大学 材料科学与工程学院，山东 青岛 266042）
摘要： 采用沉淀法合成了YVO4:Eu3+,Bi3+荧光粉，利用XRD，SEM和TEM对样品的结构和形貌进行表征，并用荧光光谱仪测试了样品的激发和发射光谱。X射线衍射图分析表明，所制得的荧光粉与YVO4的物相一致，样品属于体心四方相。其扫描电镜和透射电镜照片显示颗粒为纺锤形，大小比较均匀，长径为250 nm左右，短径为100 nm左右。在275 nm近紫外光激发下，该荧光粉的发光峰分别归属于Eu3+的5D0→7F1（596 nm），5D0→7F2(617 nm，621 nm)，5D0→7F3(654 nm)，5D0→7F4(702 nm)辐射跃迁。最强发射位于617 nm左右，属于红光。研究了Eu3+浓度对样品发光强度的影响。随着Eu3+浓度的增加，发射峰强度增大，当Eu3+摩尔分数为12%时，峰值强度最大。Bi3+对Eu3+的发光有一定的敏化作用，当Bi3+摩尔分数达到5%时，敏化作用最强。
关键词: YVO4:Eu3+,Bi3+； 沉淀法； 荧光粉； 发光性能
中图分类号： O 482.31文献标志码： A
收稿日期：2011-12-12
基金项目： 国家自然科学基金项目（51072087）；山东省中青年科学家科研奖励基金项目（BS2010CL020）.
作者简介： 韩荣江（1971—），男，副教授.
Morphology-controlled Precipitation Synthesis and Luminescent Properties of YVO4:Eu3+, Bi3+ Powder
HAN Rong-jiang, GAO Dan, CHEN Ke-zheng
(CollegeofMaterials Scienceand Engineering,QingdaoUniversityof Science and Technology,Qingdao266042,China)
Abstract: YVO4:Eu3+, Bi3+ phosphors were synthesized by a precipitation method. The structure and morphology of the products were characterized by XRD, FE-SEM, and TEM. The exitation and emission spectra of the products were investigated by fluorescence spectrometer. The X-ray diffraction (XRD) patterns showed that the powder was a body-centered tetragonal YVO4 phase. The SEM and TEM images showed that the YVO4:Eu3+, Bi3+ particles were spindle in shape with a mean diameter of 250 nm and minimum as 100 nm. The emission spectra of YVO4:Eu3+, Bi3+ phosphors have several emission peaks corresponding to the 5D0→7F1(596 nm), 5D0→7F2(617 nm, 621 nm), 5D0→7F3(654 nm) and 5D0→7F4(702 nm) transitions of Eu3+. The effect of Eu3+ concentration on the emission intensity of YVO4:Eu3+,Bi3+ was investigated, and the results showed that the emission intensity increased with the increment of Eu3+ concentration, reaching a maximum value at 12% of Eu3+ concentration. It was also found that Bi3+ could increase the emission intensity of Eu3+, reaching a maximum value at 5% of Bi3+.
Key words: YVO4:Eu3+, Bi3+; precipitation method; phosphor; luminescent properties
