| Nanocrystals precipitation and up-conversion luminescence in Yb^3＋-Tm^3＋ co-doped oxyfluoride glasses |
| |
| 引用本文： | 邱建备,宋志国.Nanocrystals precipitation and up-conversion luminescence in Yb^3＋-Tm^3＋ co-doped oxyfluoride glasses[J].中国稀土学报(英文版),2008,26(6):919-923. |
| |
| 作者姓名： | 邱建备 宋志国 |
| |
| 作者单位： | Key Laboratory of Advanced Materials, Kunming University of Science and Technology, Kunming 650093, China |
| |
| 基金项目： | Project supported by the National Natural Science Foundation of China （50572029） and Natural Science Foundation Project of Yunnan Province （2007E036M） |
| |
| 摘 要： | Rare earth ions doped oxyfluoride glass with composition of 28SiO2·22AlO1.5·40PbF2·10PbO·（4.8-x） GdFy0.1NdF3.xYbF3·0.1TmF3 （x=-0, 0.1, 0.2, 0.5, 1, 2, 3, 4 and 4.8） in molar ratio was developed. When the oxyfluoride glasses were heat-treated at the first crystallization temperature, the glasses gave transparent glass-ceramics in which rare earth containing fluorite-type nanocrystals of about 17.2 nm in diameter uniformly precipitated in the glass matrix. Compared with the glasses before heat treatment, the glass-ceramics exhibited very strong blue up-conversion luminescence under 800 nm light excitation. Rare earth containing nanocrystals were also space selectively precipitated upon laser irradiation in an oxyfluoride glass, the size of precipitated nanocrystals could be controlled by laser power and scan speed. The intensity of the blue up-conversion luminescence was strongly dependent on the precipitation of β-PbF2 nanocrystal and the YbF3 concentration. The reasons for the highly efficient Tm^3＋ up-conversion luminescence after laser irradiation were discussed.
|
| 关 键 词： | 氟氧化玻璃 纳米晶体 激光辐射 稀土 |
| 收稿时间： | 11 January 2008 |
Nanocrystals precipitation and up-conversion luminescence in Yb-Tm co-doped oxyfluoride glasses |
| |
| Jianbei QIU,Zhiguo SONG.Nanocrystals precipitation and up-conversion luminescence in Yb-Tm co-doped oxyfluoride glasses[J].Journal of Rare Earths,2008,26(6):919-923. |
| |
| Authors: | Jianbei QIU Zhiguo SONG |
| |
| Affiliation: | aKey Laboratory of Advanced Materials, Kunming University of Science and Technology, Kunming 650093, China |
| |
| Abstract: | Rare earth ions doped oxyfluoride glass with composition of 28SiO2·22AlO1.5·40PbF2·10PbO·(4.8–x) GdF3·0.1NdF3·xYbF3·0.1TmF3 (x=0, 0.1, 0.2, 0.5, 1, 2, 3, 4 and 4.8) in molar ratio was developed. When the oxyfluoride glasses were heat-treated at the first crystallization temperature, the glasses gave transparent glass-ceramics in which rare earth containing fluorite-type nanocrystals of about 17.2 nm in diameter uniformly precipitated in the glass matrix. Compared with the glasses before heat treatment, the glass-ceramics exhibited very strong blue up-conversion luminescence under 800 nm light excitation. Rare earth containing nanocrystals were also space selectively precipitated upon laser irradiation in an oxyfluoride glass, the size of precipitated nanocrystals could be controlled by laser power and scan speed. The intensity of the blue up-conversion luminescence was strongly dependent on the precipitation of β-PbF2 nanocrystal and the YbF3 concentration. The reasons for the highly efficient Tm3+ up-conversion luminescence after laser irradiation were discussed. |
| |
| Keywords: | oxyfluoride glass nanocrystal up-conversion laser irradiation rare earths |
| 本文献已被 维普 ScienceDirect 等数据库收录！ |
|
