Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3094753
Keywords
cerium; europium; light emitting diodes; phosphors; strontium compounds; ultraviolet radiation effects
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Funding
- National Basic Research Program of China [2007CB935502]
- National Natural Science Foundation of China [20771098]
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The Sr3Al2O5Cl2:Ce3+,Eu2+ phosphors were prepared by solid state reaction. The obtained phosphors exhibit a strong absorption in the UV-visible region and have two intense emission bands at 444 and 609 nm. The energy transfer from the Ce3+ to Eu2+ ions was observed, and the critical distance has been estimated to be about 24.5 A by spectral overlap method. Furthermore, the developed phosphors can generate lights from yellow-to-white region under the excitation of UV radiation by appropriately tuning the activator content, indicating that they have potential applications as an UV-convertible phosphor for white light emitting diodes.
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