Wavelength-tunable and thermally stable Li-α-sialon:Eu2+ oxynitride phosphors for white light-emitting diodes

被引：291

作者：

Xie, Rong-Jun

Hirosaki, Naoto

Mitomo, Mamoru

Sakuma, Ken

Kimura, Naoki

机构：

[1] Natl Inst Mat Sci, Nanoceram Ctr, Tsukuba, Ibaraki 3050044, Japan

[2] Fujikura Ltd, Opt & Elect Lab, Sakura, Chiba 2858550, Japan

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 24期

基金：

日本学术振兴会;

关键词：

D O I：

10.1063/1.2402880

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Eu2+-activated Li-alpha-sialon is a promising yellow phosphor for white light-emitting diodes (LEDs). This letter reports that the emission of Eu2+ in Li-alpha-sialon can be tuned widely (563-586 nm) by tailoring the composition or controlling the Eu2+ concentration. The thermal stability of Li-alpha-sialon:Eu2+, relying a little on the composition and the Eu2+ concentration, remains high in a wide temperature range (25-200 degrees C). Moreover, the chromaticity of Li-alpha-sialon:Eu2+ does not shift with changes in temperature. Using a single Li-alpha-sialon:Eu2+ phosphor, highly efficient white LEDs (46-55 lm/W) with different color temperatures (3000-5200 K) can be fabricated. (c) 2006 American Institute of Physics.

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页数：3

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