Design of a Yellow-Emitting Phosphor with Enhanced Red Emission via Valence State-control for Warm White LEDs Application

被引：32

作者：

Chen, Jian ^{[1
]}

Liu, Yangai ^{[1
]}

Mei, Lefu ^{[1
]}

Peng, Peng ^{[2
]}

Cheng, Qijin ^{[3
]}

Liu, Haikun ^{[1
]}

机构：

[1] China Univ Geosci, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Sch Mat Sci & Technol, Beijing 100083, Peoples R China

[2] Beihang Univ, Dept Mat Proc & Control Engn, Sch Mech Engn & Automat, Beijing 100191, Peoples R China

[3] Xiamen Univ, Sch Energy Res, Xiamen 361005, Fujian, Peoples R China

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

中国国家自然科学基金;

关键词：

LUMINESCENT PROPERTIES; ENERGY-TRANSFER; POTENTIAL PHOSPHOR; CRYSTAL-STRUCTURE; LIGHT; CE3+; EU2+; OXYNITRIDE; GLASS; IONS;

D O I：

10.1038/srep31199

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The phosphor-converted warm W-LED have being rapidly developed due to the stringent requirements of general illumination. Here, we utilized a strategy to synergistically enhance the red region and emission intensity of novel Eu-activated yellow-emitting LaSiO2N phosphors. This was realized by predicting optimum crystal structure, and governing the concentration of doping ions as well as preparation temperature. By using these straight-forward methods, we were able to vary the valence to enhance the red region and improve the quantum efficiency of LaSiO2N phosphor. The warm W-LED lamp fabricated with this red region enhanced LaSiO2N:Eu phosphor exhibited high CRI (Ra = 86), suitable CCT (5783 K) and CIE chromaticity (0.33, 0.36), indicating this synergistically enhanced strategy could be used for design of yellow-emitting phosphor materials to obtain warm W-LEDs.

引用

页数：11

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