Yb^3＋／Pr^3＋共掺TeO2-ZnO-Na2O玻璃的能量传递和上转换发光  

Energy Transfer and Frequency Upconversion in Yb^3＋/Pr^3＋ Co-doped TeO2-ZnO-Na2O Glasses

作　　者：厉旭杰[1,2] 聂秋华[1,2] 戴世勋[1,2] 徐铁峰[1,2] 陆龙君[1,2] 章向华 

机构地区：[1]宁波大学信息科学与工程学院,宁波315211 [2]宁波市新型功能材料及其制备科学实验室——省部共建国家重点实验室培育基地,宁波315211 [3]法国雷恩1大学玻璃与陶瓷实验室,雷恩35042

出　　处：《武汉理工大学学报》2007年第E01期118-123,共6页Journal of Wuhan University of Technology

基　　金：浙江省自然科学基金（Y104498）和浙江省科技厅（2005C31014和2006C21082）

摘　　要：制备了Yb^3＋／Pr^3＋共掺TeO2-ZnO-Na2O玻璃。研究了980nm泵浦下上转换发光光谱，分析了上转换发光机制。基于吸收光谱对Pr^3＋在TZN玻璃进行了Judd—Ofelt分析，计算了荧光跃迁几率，激发态辐射寿命，和荧光分之比。在450—750nm范围内有多处上转换荧光，依次为479nm（^3Po→^3H4），542nm（^3P0→^3H5），589nm（^1D2→^3H4），621nm（^3P0→^3H6），651nm（^3P0→^3F2）和687nm（^1D2→^3H5）。其中651nm（^3P0→^3F2）红光明显强于其它以Pr^3＋：^3P0为初始能级的上转换光（479nm，542nm，621nm）。通过Dexter理论，计算得到了碲酸盐玻璃中Yb^3＋→Pr^3＋共振能量转移参数为CnA=2．67×10^-40cm^6／s，转移效率为16．5％。Glasses with the composition of TeO2-ZnO-Na2O were fabrication and characterization. The upconversion luminescence spectra under 980 nm exaltation were investigated and the possible upconversion mechanisms had been evaluated. The Judd-Ofelt analysis for Pr^3＋ ions in TZN glasses was also performed on the base of absorption spectrum, and the transition probabilities, excited state lifetimes and the fluorescence branching ratios were calculated. The efficient upconversion fluorescences corresponding to the ^3P0→^3H4（479 nm）, ^3P0→^3H5（542 nm）, ^1D2→^3H4（589 nm）, ^3P0→^3H6（621 nm）, ^3P0→^3F2（651 nm） and ^1D2→^3H5（687 nm） transitions of Pr^3＋ were observed under 980 nm excitation. And the red emission ^3p0→^3F2（651 nm） was-stronger than the emission （ 479 nm,542 nm, 621 nm）. By theoretical investigations of resonant energy transfer proposed by Dexter, the calculated energy transfer constant and energy transfer rate were 2.67 × 10^-40cm^6/s and 16.5%, respectively.

关 键 词：碲酸盐玻璃 上转换发光 能量转移 

分 类 号：O482.31[理学—固体物理]