Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3076111
Keywords
europium; glass ceramics; heat treatment; lithium compounds; luminescence; nanofabrication; nanostructured materials; Stark effect; terbium
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Funding
- National Natural Science Foundation of China [50672098]
- National Engineering Research Center for Optoelectronic Crystalline Materials [2006K02, 2006KL002]
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The Eu3+ and Tb3+ doped glass ceramics containing tetragonal LiYbF4 nanocrystals were prepared. The Stark splitting emission, the low electric dipole D-5(0)-> F-7(2) transition, and the long lifetime of Eu3+ evidenced the partition of rare earth into LiYbF4. For Tb3+ doped glass ceramic, intense ultraviolet emission of Tb3+: (5)G(6), D-5(3)-> F-7(6) transition via cooperative sensitization of Yb3+ and bright blue cooperative luminescence originated from the coupled state of Yb3+-Yb3+ ionic pairs were achieved under 976 nm excitation, ascribing to the low-phonon-energy environment of rare earth ions enriched in nanocrystals and the efficient Yb3+-Tb3+ or Yb3+-Yb3+ interionic interactions.
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