期刊
CHEMICAL PHYSICS LETTERS
卷 690, 期 -, 页码 31-37出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2017.10.038
关键词
Phosphor; Energy transfer; Thermal stability; w-LEDs
资金
- National Natural Science Foundation of China [51472223]
- Program for New Century Excellent Talents from the University of Ministry of Education of China [CET-12-0951]
- Fundamental Research Funds for the Central Universities [2652015020]
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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