Luminescent properties and energy transfer in the green phosphors LaBSiO5:Tb3+, Ce3+.
Luminescence
; 30(6): 719-22, 2015 Sep.
Article
in En
| MEDLINE
| ID: mdl-25349104
ABSTRACT
LaBSiO5 phosphors doped with Ce(3+) and Tb(3+) were synthesized using the conventional solid-state method at 1100 °C. The phase purity and luminescent properties of these phosphors are investigated. LaBSiO5Tb(3+) phosphors show intense green emission, and LaBSiO5 phosphors doped with Ce(3+) show blue-violet emission under UV light excitation. LaBSiO5 phosphors co-doped with Ce(3+) and Tb(3+) exhibit blue-violet and green emission under excitation by UV light. The blue-violet emission is due to the 5d-4f transition of Ce(3+) and the green emission is ascribed to the (5) D4 â (7) F5 transition of Tb(3+). The spectral overlap between the excitation band of Tb(3+) and the emission band of Ce(3+) supports the occurrence of energy transfer from Ce(3+) to Tb(3+), and the energy transfer process was investigated.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Terbium
/
Cerium
/
Luminescent Agents
Language:
En
Journal:
Luminescence
Journal subject:
BIOFISICA
/
BIOQUIMICA
Year:
2015
Type:
Article