Synthesis and photoluminescence properties of a red emitting phosphor NaSr2（NbO3）5:RE3+（RE=Sm,Pr） for white LEDs
来源期刊：JOURNAL OF RARE EARTHS2013年第11期
论文作者：朱革 慈志鹏 史玉茸 王育华
文章页码：1049 - 1052
摘 要：Rare earth Sm3+,Pr3+doped NaSr2（NbO3）5 red phosphors were successfully synthesized.X-ray diffraction analysis indicated that all the samples were single phased.The luminescence property was investigated in detail by diffuse-reflectance spectra and photoluminescence spectra measurement.Both NaSr2（NbO3）5:Sm3+and NaSr2（NbO3）5:Pr3+phosphors showed strong absorption in near ultraviolet region,which was suitable for application in LEDs.When excited by UV light,they both emitted bright red emission with CIE chromaticity coordinates（0.603,0.397）and（0.669,0.330）,respectively.The optimal doping concentration of Sm3+doped NaSr2（NbO3）5was measured to be 0.04 and that for Pr3+doped NaSr2（NbO3）5was 0.01.The integral emission intensity was also measured and compared with the commercial red phosphor Y2O3:Eu3+.The results indicated that NaSr2（NbO3）5:RE3+（RE=Sm,Pr）have potential to serve as a red phosphor for UV pumped white LEDs.
朱革，慈志鹏，史玉茸，王育华
Department of Materials Science, School of Physical Science and Technology, Lanzhou University
摘 要：Rare earth Sm3+,Pr3+doped NaSr2（NbO3）5 red phosphors were successfully synthesized.X-ray diffraction analysis indicated that all the samples were single phased.The luminescence property was investigated in detail by diffuse-reflectance spectra and photoluminescence spectra measurement.Both NaSr2（NbO3）5:Sm3+and NaSr2（NbO3）5:Pr3+phosphors showed strong absorption in near ultraviolet region,which was suitable for application in LEDs.When excited by UV light,they both emitted bright red emission with CIE chromaticity coordinates（0.603,0.397）and（0.669,0.330）,respectively.The optimal doping concentration of Sm3+doped NaSr2（NbO3）5was measured to be 0.04 and that for Pr3+doped NaSr2（NbO3）5was 0.01.The integral emission intensity was also measured and compared with the commercial red phosphor Y2O3:Eu3+.The results indicated that NaSr2（NbO3）5:RE3+（RE=Sm,Pr）have potential to serve as a red phosphor for UV pumped white LEDs.
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