Effects of local structure of Ce3+ ions on luminescent properties of Y3Al5O12: Ce nanoparticles

被引：131

作者：

He, Xiaowu ^{[1
]}

Liu, Xiaofang ^{[1
]}

Li, Rongfeng ^{[1
]}

Yang, Bai ^{[1
]}

Yu, Kaili ^{[1
]}

Zeng, Min ^{[1
]}

Yu, Ronghai ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, 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：

LOW-TEMPERATURE SYNTHESIS; YTTRIUM-ALUMINUM-GARNET; SOL-GEL SYNTHESIS; ENERGY-TRANSFER; SINGLE-CRYSTAL; YAG; PHOSPHORS; POWDERS; EMISSION; DEFECTS;

D O I：

10.1038/srep22238

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：

Ce3+-doped yttrium aluminum garnet (YAG:Ce) nanocrystals were successfully synthesized via a facile sol-gel method. Multiple characterization techniques were employed to study the structure, morphology, composition and photoluminescence properties of YAG:Ce nanophosphors. The YAG:Ce-0.0055 sintered at 1030 degrees C exhibited a typical 5d(1)-4f(1) emission band with the maximum peak located at 525 nm, and owned a short fluorescence lifetime tau(1) (similar to 28 ns) and a long fluorescence lifetime tau(2) (similar to 94 ns). Calcination temperature and Ce3+ doping concentration have significant effects on the photoluminescence properties of the YAG: Ce nanophosphors. The emission intensity was enhanced as the calcination temperature increased from 830 to 1030 degrees C, but decreased dramatically with the increase of Ce3+ doping concentration from 0.55 to 5.50 at.% due to the concentration quenching. By optimizing the synthesized condition, the strongest photoluminescence emission intensity was achieved at 1030 degrees C with Ce3+ concentration of 0.55 at.%.

引用

页数：11

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