期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 1, 期 7, 页码 1407-1412出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2tc00732k
关键词
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资金
- National Science Foundation for Distinguished Young Scholars [50925206]
A novel red-emitting oxonitridosilicate phosphors, Sr2SiNzO4-1.5z:Eu2+ (0.7 < z < 1.2), was prepared by solid state reaction in NH3-N-2 atmosphere. The crystal structure was determined by Rietveld analysis on powder X-ray data. Sr(2)SiNzO(4-1.5z) (0.7 < z < 1.2) crystallizes in an orthorhombic structure with the space group of Pmnb: ba-c (no. 62), and cell parameter a 5.67366(5) angstrom, b 7.09777(4) angstrom, c 9.75112(1) angstrom. Sr2SiNzO4-1.5z:Eu2+ (0.7 < z < 1.2) exhibited broad-band red emission centred at similar to 620 nm (FWHM approximate to 95 nm) under blue light irradiation with a high QE value of 78.0% and good thermal stability, its emission intensity remains 87% at 150 degrees C of that measured at room temperature. The outstanding luminescent properties allow it to be an attractive red luminescent material for white LEDs.
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