Abstract
Eu2+, Dy3+, and Er3+ ions codoped SrAl2 O4 phosphors with near infrared (NIR) (at 1530 nm) long-persistent phosphorescence were synthesized by a combustion method. The NIR phosphorescence emission was realized through a persistent energy transfer process from Eu2+ ions to Er3+ ions. Optimal Er 3+ concentration for the maximum energy transfer efficiency was determined and NIR phosphorescence persisting for more than 10 min was achieved. A model of charge trapping and energy transfer process among Eu, Dy, and Er ions in SrAl2 O4 host was proposed.
| Original language | English |
|---|---|
| Article number | 231110 |
| Journal | Applied Physics Letters |
| Volume | 95 |
| Issue number | 23 |
| DOIs | |
| State | Published - 2009 |
| Externally published | Yes |
Bibliographical note
Funding Information:This work was supported by the U.S. Office of Naval Research (Contract No. N004315578).
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)