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Characterization and properties of green-emitting beta-SiAlON : Eu2+ powder phosphors for white light-emitting diodes
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This letter reports a b-SiAlON:Eu2+ green phosphor with the composition of Eu0.00296Si0.41395Al0.01334O0.0044N0.56528. The phosphor powder exhibits a rod-like morphology with the length of ,4 mm and the diameter of ,0.5 mm. It can be excited efficiently over a broad spectral range between 280 and 480 nm, and has an emission peak at 535 nm with a full width at half maximum of 55 nm. It has a superior color chromaticity of x=0.32 and y=0.64. The internal and external quantum efficiencies of this phosphor is 70% and 61% at lex=303 nm, respectively. This newly developed green phosphor has potential applications in phosphor-converted white LEDs.
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- 17/05/2005
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Applied Physics Letters 86 (2005) 211905.pdf | 1.01 MB | MDR Open |
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