Different up-conversion luminescent spectra of Er^(3+) ions were observed in the oxyfluoride glass-ceramics. The ratio of two fluorides in the original compositions was modified in order to form different nanocrystals. The intensity of up-conversion luminescence increased sharply when the ratio of PbF2 and CdF2 was 40:10. The data of differential thermal analysis and X-ray diffraction were used to explain the optimization fluoride ratio. The intensity of up-conversion luminescence is not only decided by the crystallizability but also mainly related with the stoichiometric proportion of fluoride nanocrystals in the glass-ceramics.
© 2005 Chinese Optics Letters
(160.2750) Materials : Glass and other amorphous materials
(170.6280) Medical optics and biotechnology : Spectroscopy, fluorescence and luminescence
(190.7220) Nonlinear optics : Upconversion
Hua Yu, Lijuan Zhao, Jie Meng, Qin Liang, Xuanyi Yu, Baiquan Tang, and Jingjun Xu, "Effect of nanocrystals on up-conversion luminescence of Er^(3+),Yb^(3+) co-doped glass-ceramics," Chin. Opt. Lett. 3, 469-471 (2005)