摘要
分别采用化学沉淀法、微波法、水热法制备了SrMoO4:0.05Eu3+,0.05Gd3+荧光粉,并通过X-射线粉末衍射(XRD)、荧光光谱和扫描电子显微镜(SEM)对其晶体结构、荧光光谱和形貌进行了表征。结果表明:SrMoO4:0.05Eu3+,0.05Gd3+的结构属体心四方晶系;其宽激发带由Eu3+-O2-、Gd3+-O2-电荷迁移带和Mo6+-O2-基质吸收峰组成,荧光发光以在616nm处Eu3+的5 D0→7 F2跃迁引起的红光发光最强;254nm紫外光激发时,化学沉淀法制备SrMoO4:0.05Eu3+,0.05Gd3+的发光峰比SrMoO4:0.05Eu3+的相应发光峰强度增大,这是由于Gd3+向Eu3+的能量传递敏化增强了Eu3+的发光。
SrMoO4：0.05Eu3＋,0.05Gd3＋phosphors were prepared by chemical precipitation method,microwave method and hydrothermal method.The crystal structure,luminescence property and morphology of the samples were characterized by XRD,fluorescence spectroscopy,SEM.XRD Analysis confirmed the samples exhibited a body-centered tetragonal crystal structure.Fluorescence spectroscopy showed that the broad excitation bands belonged to charge transfer band of Eu3＋-O2-,Gd3＋-O2-and the host absorption of Mo6＋-O2-in SrMoO4：0.05Eu3＋,0.05Gd3＋,and the most intense peak was located at 616 nm,which corresponded to the 5D0→7F2transitions of Eu3＋.The photoluminescence intensity of Eu3＋in SrMoO4：0.05Eu3＋,0.05Gd3＋prepared by chemical precipitation method increased due to an efficient energy migration process of Gd3＋→Eu3＋occurred in the phosphors under 254 nm light excitation.
出处
《化学与生物工程》
CAS
2014年第12期9-11,共3页
Chemistry & Bioengineering
基金
国家自然科学基金资助项目(21101133)
