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Title: 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

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-statemore » 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+}.« less
Authors:
 [1] ;  [1] ; ;  [2] ;  [1]
  1. Institute of Materials Science and Technology, Chengdu University of Technology, Chengdu 610059 (China)
  2. Sichuan Sunfor Light Co. Ltd., Chengdu 611731 (China)
Publication Date:
OSTI Identifier:
22451127
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 220; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BARIUM IONS; FLUORESCENCE; MICROSTRUCTURE; PEAKS; PHOSPHORS; RED SHIFT; SOLIDS; STABILITY; X-RAY DIFFRACTION