TITLE

Characterization and properties of green-emitting β-SiAlON:Eu2+ powder phosphors for white light-emitting diodes

AUTHOR(S)
Hirosaki, Naoto; Xie, Rong-Jun; Kimoto, Koji; Sekiguchi, Takashi; Yamamoto, Yoshinobu; Suehiro, Takayuki; Mitomo, Mamoru
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/23/2005, Vol. 86 Issue 21, p211905
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This letter reports a β-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 μm and the diameter of ∼0.5 μm. 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 λex=303 nm, respectively. This newly developed green phosphor has potential applications in phosphor-converted white LEDs.
ACCESSION #
17226928

 

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