Sm^(3+)掺杂BaCeO_3基发光材料的制备及发光性能  

Synthesis and Photoluminescence Properties of Sm^(3+) Doping BaCeO_3:Sm^(3+) Phosphor

作　　者：左明扬[1] 杨定明[2] 魏乐[2] 

机构地区：[1]绵阳职业技术学院,绵阳621000 [2]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,绵阳621010

出　　处：《武汉理工大学学报》2013年第7期21-25,共5页Journal of Wuhan University of Technology

基　　金：国防基础研究项目(B312011001);西南科技大学博士基金(08zx0103)

摘　　要：采用溶胶-凝胶法合成了BaCeO3:Sm3+红色荧光粉,用XRD和FL分析表征了样品的结构及发光性能。研究了Sm3+掺杂量和电荷补偿剂对其发光性能的影响。所得样品为立方晶系,荧光光谱测试结果表明:Sm3+掺杂的BaCeO3在紫外波段有两个吸收带,分别位于258nm和353nm,对应于O2-→Sm3+和O2-→Ce4+电荷迁移带;BaCeO3:Sm3+在紫外波长353nm的激发下发射出Sm3+的特征光谱,其发射峰分别位于572nm、615nm和656nm处,与Sm3+的4 G5/2→6 HJ(J=5/2,7/2,9/2)电子跃迁相对应,样品发出强烈的橙红光。Sm3+的最佳摩尔掺量为0.4%,其浓度猝灭机理是Sm3+之间的离子交换作用。共掺电荷补偿剂Li+之后,BaCeO3:Sm3+的发光强度有着很大程度的提高,当Li+摩尔浓度为12%时,其发光强度达到最大。The red phosphor of BaCeO3：Sm3＋ was synthesized by sol-gel method,the crystal structure and luminescent properties of samples were characterized by XRD and FL.The effect of doping concentration of Sm3＋ on the luminescence properties of BaCeO3：Sm3＋ was investigated.The results show that the sample belongs to cubic crystal system.BaCeO3：Sm3＋ has two absorption bands peaking at about 258 nm and 353 nm,they are attributed to the charge transfer from O2-→Sm3＋ and O2-→Ce4＋,respectively.Under ultraviolet excitation with a wavelength of 353 nm sample gives an orange luminescence,and the emission spectrum was constituted of the transition of Sm3＋,which located at 572 nm,615 nm and 656 nm,they are belongs to 4G5/2→6HJ（J=5/2,7/2,9/2） of Sm3＋.The proper amount of Sm3＋ is about 0.4%,and the mechanism of the concentration quenching is ion exchange between Sm3＋.The luminescence intensity firstly increased with Li＋ doping concentration increasing,then decreased.The optimal content of Li＋ is about 12.0%.

关 键 词：溶胶-凝胶法 BACEO3 Sm3+ 荧光性能 电荷补偿剂 

分 类 号：O482[理学—固体物理]