Journal
OPTICAL MATERIALS
Volume 31, Issue 2, Pages 342-345Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2008.05.005
Keywords
Luminescence of Tb3+ and Mn2+ ions; Cross-relaxation; Energy transfer
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Funding
- National Basic Research Program of China [2007CB935502]
- National Natural Science Foundation of China [20771098]
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Luminescent properties of LaMgAl11O19:Tb, Mn phosphors were investigated. It was observed that the energy distributions of the Tb3+-emission bands associated with transitions from the D-5(3) and D-5(4) levels to F-7(J) depend on the Tb3+-concentration, which is due to the cross-relaxation between Tb 31 ions. The emission band at about 516 nm is attributed to the T-4(1) -> (6)A(1) transition of the Mn2+ ions. We observed an energy transfer from the Tb 3, to Mn2+ ions in LaMgAl11O19:Tb, Mn. The energy transfer process may involve the D-5(3) level of the Tb3+ ions and the T-4(2) and T-4(1) level of the Mn2+ ions. (C) 2008 Elsevier B.V. All rights reserved.
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