Journal
APPLIED PHYSICS LETTERS
Volume 84, Issue 10, Pages 1647-1649Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1667620
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In order to develop a yellow phosphor that emits efficiently under the 450-470 nm excitation range, we have synthesized a Eu2+-activated Sr3SiO5 yellow phosphor and attempted to develop white light-emitting diodes (LEDs) by combining them with a InGaN blue LED chip (460 nm). Two distinct emission bands from the InGaN-based LED and the Sr3SiO5:Eu phosphor are clearly observed at 460 nm and at 570 nm, respectively. These two emission bands combine to give a spectrum that appears white to the naked eye. Our results showed that InGaN (460 nm chip)-based Sr3SiO5:Eu exhibits a better luminous efficiency than that of the industrially available product InGaN (460 nm chip)-based YAG:Ce. (C) 2004 American Institute of Physics.
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