【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.更多还原

【Abstract】 The sensitization effect of Sm3+ to Eu3+ in Eu3+/Sm3+ 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 Eu3+/Sm3+ co-doped PMMA. It is found that by doping Sm(TTFA)3 in Eu(TTFA)3-doped materials the fluorescence intensity of Eu3+ ions can be significantly improved. It indicates that Sm(TTFA)3 has a strong sensitization effect to the fluorescence of Eu(TTFA)3.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.更多还原