Eu^(3+)/Sm^(3+)共掺聚合物PMMA中敏化效应的研究  

Study on Sensitization Effect in Eu^(3+)/Sm^(3+) Co-doped PMMA

作　　者：孙婷[1] 王耀祥[1] 黄昌清[1] 田维坚[1] 葛文萍[1] 章兴龙[1] 黄琨[1] 于惠霞[1] 

机构地区：[1]中国科学院西安光学精密机械研究所信息光子学室,西安710068

出　　处：《光子学报》2007年第9期1614-1617,共4页Acta Photonica Sinica

基　　金：陕西省自然科学基金(2002F35)资助

摘　　要：研究了Eu3 +/Sm3 +共掺聚合物PMMA中Sm3 +对Eu3 +发光的敏化效应,实验采用改进的本体聚合法制备得到了Eu3 +/Sm3 +共掺聚合物PMMA,并对其荧光光谱和荧光寿命进行了分析.荧光光谱分析发现,Sm(TTFA)3的加入大大增强了Eu3 +的特征发光,表明Sm3 +对Eu3 +的荧光有很强的敏化效应,文中对其敏化过程进行了探讨与分析,提出了两种可能的敏化机理.荧光寿命分析表明,在共掺情况下,掺杂浓度对荧光寿命没有明显的影响,寿命范围在300 ～400μs之间.The sensitization effect of Sm^3＋ to Eu^3＋ in Eu^3＋/Sm^3＋ co-doped PMMA with different doping concentrations was studied. These samples were fabricated using modified noumenon polymeric method. Fluorescence spectrometer was utilized to characterize the fluorescence properties of the Eu^3＋/Sm^3＋ co doped PMMA. It is found that by doping Sm（TTFA）3 in Eu（TTFA）3-doped materials the fluorescence intensity of Eu^3＋ ions can be significantly improved. It indicates that Sm （TTFA）3 has a strong sensitization effect to the fluorescence of Eu（TTFA）s. To our knowledge, this paper is the first detailed report on this sensitization process. Two possible sensitization mechanisms were put forword. The luminescence lifetimes are almost invariable while the doping concentrations are changed. Such fluorescent PMMA might have extensive prospect of applications in optical devices, such as polymer optical fibers, polymer optical fiber laser,amplifier,waveguides and so on.

关 键 词：光学 敏化机理 Eu^3+/Sm^3+共掺 荧光强度 荧光寿命 PMMA 

分 类 号：TN244[电子电信—物理电子学]