Synthesis and luminescence characteristics of Li2Y4–x Eux（WO4 ）7–y（MoO4 ）y red-emitting phosphor for white LED
来源期刊：JOURNAL OF RARE EARTHS2013年第11期
论文作者：茹晶晶 郭飞云 陈建中
文章页码：1059 - 1062
摘 要：Li2Y4–x Eux（WO4）7–y（MoO4）y red-emitting phosphors were synthesized by solid state reaction and characterized by powder X-ray diffraction（XRD）and photoluminescence（PL）spectrum.The excitation spectra showed that the phosphors could be efficiently excited by near-UV light of 395 nm.When the relative molar ratio of Mo/W was 7:0,and the optimum doped concentration of Eu3+was 2.8 mol,the phosphor showed strong red emission lines at 615 nm corresponding to the forced electric dipole5D0→7F2transition of Eu3+.Compared with Na2Y2Eu2（MoO4）7and K2Y2Eu2（MoO4）7,the fluorescence intensity of Li2Y1.2Eu2.8（MoO4）7phosphor was the strongest.The CIE chromaticity coordinates of Li2Y1.2Eu2.8（MoO4）7phosphor was calculated to be（0.66,0.34）.
茹晶晶1，郭飞云2，陈建中2
1. Department of Chemistry, Ningde Normal University2. College of Chemistry and Chemical Engineering, Fuzhou University
摘 要：Li2Y4–x Eux（WO4）7–y（MoO4）y red-emitting phosphors were synthesized by solid state reaction and characterized by powder X-ray diffraction（XRD）and photoluminescence（PL）spectrum.The excitation spectra showed that the phosphors could be efficiently excited by near-UV light of 395 nm.When the relative molar ratio of Mo/W was 7:0,and the optimum doped concentration of Eu3+was 2.8 mol,the phosphor showed strong red emission lines at 615 nm corresponding to the forced electric dipole5D0→7F2transition of Eu3+.Compared with Na2Y2Eu2（MoO4）7and K2Y2Eu2（MoO4）7,the fluorescence intensity of Li2Y1.2Eu2.8（MoO4）7phosphor was the strongest.The CIE chromaticity coordinates of Li2Y1.2Eu2.8（MoO4）7phosphor was calculated to be（0.66,0.34）.
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