Energy transfer and thermal stability of Ce3+, Tb3+ co-doped Ca3Si2O4N2 phosphors for white light-emitting diodes

被引：27
|
作者：
Wang, Baochen [1 ]
Liu, Yan-gai [1 ]
Huang, Zhaohui [1 ]
Fang, Minghao [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
来源：
CHEMICAL PHYSICS LETTERS | 2017年 / 690卷
基金：
中国国家自然科学基金;
关键词：
Phosphor; Energy transfer; Thermal stability; w-LEDs; TEMPERATURE-DEPENDENT LUMINESCENCE; PHOTOLUMINESCENCE PROPERTIES; NITRIDE PHOSPHORS; CRYSTAL-STRUCTURE; OXYNITRIDE; EARTH; EU2+; SR;
D O I：
10.1016/j.cplett.2017.10.038
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of Ca3Si2O4N2: Ce3+, Tb3+ phosphors were synthesized and their phase composition and luminescence properties were investigated. Results showed that an efficient energy transfer occurred between the Ce3+ and Tb3+ ions. The thermal stability of the Ce3+ emission was dramatically enhanced upon Tb3+ doping. The mechanism was attributed to a shift of the configuration coordinate and an increased energy barrier for thermal quenching, which resulted from the enhanced rigid structure of the host. Finally, a white light emitting diode lamp was fabricated, which exhibited excellent properties. These results indicate that Ca3Si2O4N2: Ce3+, Tb3+ can serve as promising blue-green emitting phosphors for w-LEDs. (C) 2017 Elsevier B.V. All rights reserved.
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页码：31 / 37
页数：7
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