Effect of Y3+ on the local structure and luminescent properties of La3-xYxSi6N11:Ce3+ phosphors for high power LED lighting

被引：47

作者：

Du, Fu ^{[1
,2
]}

Zhuang, Weidong ^{[1
,2
]}

Liu, Ronghui ^{[1
,2
]}

Liu, Yuanhong ^{[1
,2
]}

Zhong, Jiyou ^{[1
,2
,4
]}

Gao, Wei ^{[1
,2
]}

Chen, Kai ^{[1
,2
]}

Chen, Lei ^{[1
,2
]}

Kato, Kenichi ^{[3
]}

Lin, Kun ^{[4
]}

机构：

[1] Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China

[2] Grirem Adv Mat Co Ltd, Beijing 100088, Peoples R China

[3] RIKEN, SPring Ctr 8, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan

[4] Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China

来源：

RSC ADVANCES | 2016年 / 6卷 / 80期

基金：

中国国家自然科学基金;

关键词：

Luminescence - Lanthanum compounds - Lithium compounds - Solid state reactions - Spectrum analyzers - Silicon compounds - Light emitting diodes - Emission spectroscopy - Phosphors - Cerium compounds;

D O I：

10.1039/c6ra18460j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of Ce3+-activated La3-xYxSi6N11 yellow phosphors were synthesized by high temperature solid-state reaction; their structures and luminescent properties were systematically investigated. The results of structural and spectral characterization showed that with the increase of Y3+ replacing La3+ in La3-xYxSi6N11:Ce3+ (0 < x <= 0.9), the space group remains P4bm but with Y3+ occupying two crystallographic sites in different ratio, while the emission spectra exhibit a red-shift from 535 nm to 552 nm. Moreover, the thermal quenching properties of La2.86-xYxSi6N11:0.14Ce(3+) exhibit somewhat of a decrease with the increase of x value, but still remains at 95% (x = 0.9) of the initial emission intensity measured at 200 degrees C. In addition, the light quality is significantly improved by direct packaging with a blue LED chip. The above results indicate that La3-xYxSi6N11:Ce3+ may be a promising phosphor for high power white-light LEDs.

引用

页码：77059 / 77065

页数：7

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