基于CaBa_2(BO_3)_2中的Ce^(3+)→Tb^(3+)能量传递及光谱特性  

Luminescence and Energy Transfer of Ce^(3+),Tb^(3+) in CaBa_2(BO_3)_2

作　　者：杨志平[1] 宋兆丰[1] 马欣[1] 王凤和[1] 李立虎[1] 闻建伟[2] 

机构地区：[1]河北大学物理科学与技术学院 [2]河北大学电子信息工程学院,河北保定071002

出　　处：《中国稀土学报》2010年第2期238-241,共4页Journal of the Chinese Society of Rare Earths

基　　金：河北科学技术发展基金资助项目(51215103b)

摘　　要：采用高温固相法合成了Ce3+,Tb3+掺杂激活的CaBa2(BO3)2荧光粉,并对其发光特性进行了研究。观察到CaBa2(BO3)2中Ce3+对Tb3+发光的敏化现象。在367 nm紫外光激发下,单掺Tb3+时CaBa2(BO3)2不发光。当Ce3+和Tb3+共掺时,出现Tb3+的发射峰,样品发绿光,表明Ce3+对Tb3+的发光有很强的敏化作用。根据Forster-Dexter理论,分析Ce3+和Tb3+的能量传递过程,还证明在CaBa2(BO3)2:Ce3+,Tb3+中Ce3+对Tb3+的能量传递属于共振能量传递。CaBa2（BO3）2：Ce3＋,Tb3＋ phosphor was synthesized by high temperature solid-state reaction,and its luminescence properties were investigated.The luminescence sensitized phenomenon,which was Ce3＋ towards to Tb3＋,was observed.Under 367 nm excitation,the sample doped by single Tb3＋ was not luminescent,when it doped together with Ce3＋,Tb3＋,the emission peak of Tb3＋ appeared,and the phosphor showed excellent green emission.It was suggested that the Tb3＋ was sensitized strongly by Ce3＋.According to Forster-Dexter′s theory,we analyzed energy transfer process between Ce3＋ and Tb3＋,and demonstrated that the energy transfer between Ce3＋ and Tb3＋ was due to resonance energy transfer in CaBa2（BO3）2：Ce3＋,Tb3＋.

关 键 词：发光 CaBa2(BO3)2:Ce3+ Tb3+ 高温固相法 共振能量传递 稀土 

分 类 号：O482.31[理学—固体物理]