掺Yb^3＋硼酸盐玻璃的浓度猝灭机理  

Concentration Quenching Mechanism in Yb^3＋ -doped Borate Glass

作　　者：张约品[1] 许思超[1] 夏海平[1] 王金浩[1] 章践立[1] 

机构地区：[1]宁波大学光电子功能材料研究所,宁波315211

出　　处：《武汉理工大学学报》2007年第E01期331-334,共4页Journal of Wuhan University of Technology

基　　金：浙江省自然科学基金（Y106394）,宁波市博士基金（2005A610023）和浙江省教育厅科研项目（20051747）

摘　　要：测量了不同掺杂浓度下掺Yb^3＋硼酸盐玻璃的吸收光谱、荧光光谱和上转换光谱。研究了Yb^3＋掺杂浓度对其发光强度、荧光寿命和上转换发光的影响及浓度猝灭机理。实验结果袁明Yb^3＋离子掺杂浓度到1arm％时，Yb^3＋离子的荧光强度开始下降，出现浓度猝灭效应，Yb^3＋硼酸盐玻璃的浓度猝灭主要是杂质稀土离子引起的。Yb^3＋掺杂硼酸盐玻璃中能量从Yb^3＋离子向杂质稀土离子的能量转移，使Yb^3＋产生浓度猝灭效应。Absorption spectra, emission spectra and upconversion spectra were measured with differem concentrations of Yb^3＋ - doped borate glasses. Dependence of luminescence intensity and fluorescence lifetime on concentrations of Yb^3＋ was analyzed. The mechanism of concentration quenching was discussed and explained. The experiment demonstrates that concentration quenching occurred when the concentration was above 1 atm%. Luminescence intersity and fluorescence decreased because of it. It is shown that the presence of the Er^3＋ , Tm^3＋ etc. impurities ions was responsible for the quenching of the luminescence of Yb^3＋ ions in the borate glass. Energy migration from Yb^3＋ to Er^3＋ , Tm^3＋ etc. impurities ions quenched the luminescence of Yb^3＋.

关 键 词：Yb^3+掺杂 硼酸盐玻璃 浓度猝灭 光谱性质 

分 类 号：TQ171[化学工程—玻璃工业]