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

Applied Physics Letters - Tập 86 Số 21 - 2005
Naoto Hirosaki1, Rong‐Jun Xie1, Koji Kimoto1, Takashi Sekiguchi2, Yoshinobu Yamamoto1, Takayuki Suehiro1, Mamoru Mitomo1
1National Institute for Materials Science (NIMS) Advanced Materials Laboratory, , Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
2National Institute for Materials Science (NIMS) Nano Materials Laboratory, , Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

Tóm tắt

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 ∼4μm and the diameter of ∼0.5μm. 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=303nm, respectively. This newly developed green phosphor has potential applications in phosphor-converted white LEDs.

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Applied Physics Letters

Tập 86 Số 21

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