【摘 要】
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Ce3+ and Tb3+ co-doped SrSi2N2O2 phosphors were prepared by solid-state reaction.The X-ray diffraction pattern exhibited that the phosphor consisted mainly of o
【机 构】
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Department of Chemistry,College of Materials Science and Engineering
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Ce3+ and Tb3+ co-doped SrSi2N2O2 phosphors were prepared by solid-state reaction.The X-ray diffraction pattern exhibited that the phosphor consisted mainly of oxygen-rich SrSi2N2O2.The optical properties of SrSi2N2O2∶Ce3+,SrSi2N2O2∶Tb3+ and SrSi2N2O2∶Ce3+,Tb3+were studied,respectively.The emission intensity of Tb3+ at 541 nm was remarkably enhanced by Ce3+ in SrSi2N2O2∶Ce3+,Tb3+ phosphor,which was attributed to the energy transfer from Ce3+ to Tb3+.The chromaticity coordinates of phosphors were investigated as a function of Tb3+ concentration.When the Ce3+ and Tb3+ concentratios were 0.02 and 0.18 mol per formula unit,respectively,the chromaticity coordinate was (0.257,0.337) in the CIE 1931 chromaticity diagram.SrSi2N2O2Ce3+,Tb3+ phosphors could be used for white light emitting diodes.
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