Near-ultraviolet excitable orange-yellow Sr3(Al2O5)Cl2:Eu2+ phosphor for potential application in light-emitting diodes

Yu-Sheng Tang; Shu-Fen Hu; Wei-Chih Ke; Chun Che Lin; Bagkar, Nitin C.; Ru-Shi Liu
September 2008
Applied Physics Letters;9/29/2008, Vol. 93 Issue 13, p131114
Academic Journal
Sr3(Al2O5)Cl2 phosphor doped with Eu2+ was prepared by a soli-state reaction. This phosphor emits a broad orange-yellow luminescence with a peak wavelength of 620 nm and a full width at half maximum of about 175 nm under near-ultraviolet (NUV) excitation at ∼400 nm. Yellow light-emitting diodes (LEDs) for general lighting were fabricated by combining Sr3(Al2O5)Cl2:Eu2+ phosphor with an NUV chip. The phosphor-converted LEDs had a color temperature of about 2300 K and their color rendering index was 74.


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