Enhanced luminescence properties in (Sr{sub 1−x}Ba{sub x}){sub 2.97}SiO{sub 3}N{sub 4/3}:0.03Eu{sup 2+} oxynitride phosphor
- Institute of Materials Science and Technology, Chengdu University of Technology, Chengdu 610059 (China)
- Sichuan Sunfor Light Co. Ltd., Chengdu 611731 (China)
An oxynitride phosphor (Sr{sub 1−x}Ba{sub x}){sub 2.97}SiO{sub 3}N{sub 4/3}:0.03Eu{sup 2+} (SBSON) was synthesized by the solid-state reaction at 1550 °C for 4 h. XRD results show that the major phase of the synthesized phosphors is isostructural with Sr{sub 3}SiO{sub 5} when the content of Ba{sup 2+} is not greater than 0.5. Through the doping of Ba{sup 2+} ions, the particle morphology, luminescence intensities and thermal stability are all improved obviously. When the x equals 0.5 the luminescence intensity reaches maximum which is about 1.48 times as that of the phosphor free of Ba{sup 2+}. The emission peaks can be tuned from 583 nm to 601 nm by adjusting Ba{sup 2+} content. The doping of Ba{sup 2+} can also prolong the average lifetime from 1482 to 2122 ns. With high emission intensity and thermal stability, this novel oxynitride phosphor SBSON shows potential application in white LEDs. - Graphical abstract: Through the change of micro-structure by doping Ba{sup 2+} ions proved by the XRD patterns, (Sr{sub 1−x}Ba{sub x}){sub 2.97}SiO{sub 3}N{sub 4/3}:0.03Eu{sup 2+}phosphor eventually achieves the extension of lifetime and the improvement of luminescence properties and thermal stability. - Highlights: • (Sr{sub 1−x}Ba{sub x}){sub 2.97}SiO{sub 3}N{sub 4/3}:0.03Eu phosphors were prepared by the solid-state reaction. • The synthesized phosphor (x≤0.5) is isostructural with Sr{sub 3}SiO{sub 5}. • The emission peaks red shift to 601 nm then slightly blue shift by adding Ba{sup 2+}. • The emission intensity and thermal stability are both enhanced. • Fluorescent lifetime can be prolonged by doping Ba{sup 2+}.
- OSTI ID:
- 22451127
- Journal Information:
- Journal of Solid State Chemistry, Vol. 220; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enhancement of photoluminescence properties and modification of crystal structures of Si{sub 3}N{sub 4} doping Li{sub 2}Sr{sub 0.995}SiO{sub 4}:0.005Eu{sup 2+} phosphors
Structure, luminescence and thermal quenching properties of Eu doped Sr{sub 2−x}Ba{sub x}Si{sub 5}N{sub 8} red phosphors