| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1496604 | Optical Materials | 2007 | 5 Pages |
Abstract
YAG:Tm3+and YAG:Yb3+, Tm3+ nanocrystals were synthesized by a co-precipitation method using ammonium hydrogen carbonate as precipitator. Pure nanocrystals with a crystallite size of 40 nm were obtained after the precipitates were calcined at 800 °C. YAG:Tm3+ and YAG:Yb3+, Tm3+ powder compacts were excited by 796 and 940 nm, respectively. No upconversion emissions were observed either in YAG:Tm3+ and YAG:Yb3+, Tm3+ nanocrystals excited at 796 nm or in YAG:Tm3+ nanocrystals excited at 940 nm. However, the blue emission of YAG:Yb3+, Tm3+ nanocrystals excited by 940 nm was strong enough to be seen by the naked eyes. The emission intensity of this material was also influenced by Yb3+ concentration as well as the calcination temperature.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
M. Liu, S.W. Wang, J. Zhang, L.Q. An, L.D. Chen,