中国物理B ›› 2014, Vol. 23 ›› Issue (5): 57802-057802.doi: 10.1088/1674-1056/23/5/057802
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
马辰硕a, 焦清a, 李龙基a, 周大成a, 杨正文a b, 宋志国a b, 邱建备a b
Ma Chen-Shuo (马辰硕)a, Jiao Qing (焦清)a, Li Long-Ji (李龙基)a, Zhou Da-Cheng (周大成)a, Yang Zheng-Wen (杨正文)a b, Song Zhi-Guo (宋志国)a b, Qiu Jian-Bei (邱建备)a b
摘要: The Er3+/Yb3+ co-doped transparent oxyfluoride glass-ceramics containing CaF2 nano-crystals were successfully prepared. After heat treatments, transmission electron microscopy (TEM) images showed that CaF2 nano-crystals of 20-30 nm in diameter precipitated uniformly in the glass matrix. Comparing with the host glass, high efficiency upconversion luminescence of Er3+ at 540 nm and 658 nm was observed in the glass ceramics under the excitation of 980 nm. Moreover, the size of the precipitated nano-crystals can be controlled by heat-treatment temperature and time. With the increase of the nano-crystal size, the intensity of the red emission increased more rapidly than that of the green emission. The energy transfer process of Er3+ and Yb3+ was convinced and the possible mechanism of Er3+ up-conversion was discussed.
中图分类号: (Absorption and reflection spectra: visible and ultraviolet)