Effect of glass network modifier R_2O(R=Li, Na and K) on upconversion luminescence in Er^(3+)/Yb^(3+) co-doped NaYF_4 oxyfluoride glass-ceramics  

作　　者：高源 胡曰博 任鹏 周大成 邱建备 

机构地区：[1]Faculty of Material Science and Engineering, Kunming University of Science and Technology [2]Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology [3]Key Laboratory of Advanced Materials of Yunnan Province

出　　处：《Journal of Rare Earths》2015年第8期830-836,共7页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(61368007,61265004,51272097);the Specialized Research Fund for the Doctoral Program of Higher Education of China(20125314120018)

摘　　要：The effect of glass network modifier R2O （R=Li, Na, K） on upconversion luminescence in Er3＋/yb3＋ co-doped NaYF4 oxyfluoride glass-ceramics was investigated. NaYF4 nanocrystals with different sizes were studied under glass network modifier alkali mental oxide. The nanocrystals size in NaYF4 of Li2O modified samples was 11 nm, whereas in the Na20 and K2O modified sample, the crystal size was 25 and 43 nm, respectively. It was found that red, yellow and green upconversions were observed in SAL, SAN, SAK glass ceramics. The reported results would deepen the understanding of size effects on the lanthanide upcon- version in nanocrystals.The effect of glass network modifier R2O （R=Li, Na, K） on upconversion luminescence in Er3＋/yb3＋ co-doped NaYF4 oxyfluoride glass-ceramics was investigated. NaYF4 nanocrystals with different sizes were studied under glass network modifier alkali mental oxide. The nanocrystals size in NaYF4 of Li2O modified samples was 11 nm, whereas in the Na20 and K2O modified sample, the crystal size was 25 and 43 nm, respectively. It was found that red, yellow and green upconversions were observed in SAL, SAN, SAK glass ceramics. The reported results would deepen the understanding of size effects on the lanthanide upcon- version in nanocrystals.

关 键 词：upconversion luminescence glass network modifier glass ceramics crystallization activation energy rare earths 

分 类 号：TQ171.112[化学工程—玻璃工业]