Abstract
We have synthesized the pure ternary nitride phosphor, LaSi3 N5: Ce3+from the multicomponent oxide system La 2 O3 - CeO2 - SiO2, by using the gas-reduction-nitridation method. Highly pure, single-phase LaSi3 N5: Ce3+powders possessing particle sizes of ∼0.4-0.6 μm were obtained with the processing temperature 1500 °C. The synthesized LaSi3 N5: Ce3+exhibits tunable blue broadband emission with the dominant wavelength of 464-475 nm and the external quantum efficiency of ∼34%-67% under excitation of 355-380 nm. A high thermal stability of LaSi3 N5: Ce3+compared to the existing La-Si-O-N hosts was demonstrated, indicating the promising applicability as a blue-emitting phosphor for UV-converting white light-emitting diodes.
Original language | English |
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Article number | 051903 |
Journal | Applied Physics Letters |
Volume | 95 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2009 Aug 14 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)