Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 477, Issue 1-2, Pages 941-945Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2008.11.012
Keywords
Upconversion; Energy transfer
Categories
Funding
- National Natural Science Foundation of China [10674113]
- Program for New Century Excellent Talents in University [NCET-06-0707]
- Hunan Provincial Natural Science Foundation of China [06JJ50006]
- Scientific Research Fund of Hunan Provincial Education Department [0713073, 06A071]
- Ministry of Education of China [KF0713]
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Nd3+-Yb3+-Ho3+-doped beta-Na(Y1.5Na0.5)F-6 luminescent phosphor was synthesized. Green and red upconverted emission bands of Ho3+ were observed under 808 and 980 nm diode lasers excitations The Nd3+ ion. can enhance the emissions of Ho3+ under 808 nm excitation while it quenches emissions of Ho3+ under, 980 nm excitation. The investigation of temporal behaviors exhibit the rise times of green and red emissions are much shorter under 808 nm excitation than that under 980 nm excitation. The upconversion mechanisms under two excitation sources have been discussed in terms of the experiment results. (C) 2008 Elsevier B.V. All rights reserved.
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