Upconversion luminescence of Tm3+/Yb3+codoped oxyfluoride glasses
Duan Zhong-Chao (段忠超)ab, Zhang Jun-Jie (张军杰)a, He Dong-Bing (何冬兵)ab, Dai Shi-Xun (戴世勋)a, Hu Li-Li (胡丽丽)a
a Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; b Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Abstract Novel oxyfluoride glasses are developed with the composition of 30SiO2-15Al2O3-28PbF2-22CdF2-0.1TmF3-xYbF3-(4.9-x) AlF3(x=0, 0.5, 1.0, 1.5, 2.0) in mol fraction. Furthermore, the upconversion luminescence characteristics under a 970nm excitation are investigated. Intense blue, red and near infrared luminescences peaked at 453nm, 476nm, 647nm and 789nm, which correspond to the transitions of Tm3: 1D2 $\to$ 3F4, 1G4 $\to$ 3H6, 1G4 $\to$ 3F4, and 3H4 $\to$3H6, respectively, are observed. Due to the sensitization of Yb3+ ions, all the upconversion luminescence intensities are enhanced considerably with Yb3+ concentration increasing. The upconversion mechanisms are discussed based on the energy matching rule and quadratic dependence on excitation power. The results indicate that the dominant mechanism is the excited state absorption for those upconversion emissions.
Received: 10 March 2005
Revised: 02 September 2005
Accepted manuscript online:
PACS:
78.55.Qr
(Amorphous materials; glasses and other disordered solids)
Fund: Project supported by the Shanghai ``Post-Qi-Ming-Xing plan'' for Young Scientists, China (Grant No04QMX1448) and the National Natural Science Foundation of China (Grant No 60207006).
Cite this article:
Duan Zhong-Chao (段忠超), Zhang Jun-Jie (张军杰), He Dong-Bing (何冬兵), Dai Shi-Xun (戴世勋), Hu Li-Li (胡丽丽) Upconversion luminescence of Tm3+/Yb3+codoped oxyfluoride glasses 2006 Chinese Physics 15 209
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