Synthesis and photoluminescence studies of Ba（Gd,Ln）B9O16:Eu3+（Ln=La,Y） phosphors for n-UV LED lighting and display devices
来源期刊：JOURNAL OF RARE EARTHS2015年第2期
论文作者：V.V.Rangari S.J.Dhoble
文章页码：140 - 147
摘 要：BaGdB9O16:Eu3+ and Ba（Gd,Ln）B9O16:Eu3+（Ln=La, Y） phosphors were synthesized by solid state diffusion method. The X-ray diffraction, scanning electron microscopy（SEM） and photoluminescence properties were investigated. The as-synthesized BaGdB9O16:Eu3+ and Ba（Gd,Ln）B9O16:Eu3+（Ln=La, Y） phosphors showed strong red emission under ultraviolet light excitation. By partially substituting Gd3+ by La3+ and Y3+ ions in the host BaGdB9O16:Eu3+ materials, the maximum emission intensity was observed for the optimum composition of BaGd0.91La0.8B9O16Eu0.01 phosphor. The experimental results indicated that the Eu doped BaGdB9O16 and Ba（Gd,Ln）B9O16（Ln=La, Y） phosphors were promising red phosphors, which might find potential applications in near-UV excited LED lighting as well as display devices. Comparison of as-synthesized phosphors with standard phosphor used in CFL（compact fluorescent lamp） was also done. Energy transfer mechanism of Gd3+ to Eu3+ was also discussed in this paper.
V.V.Rangari，S.J.Dhoble
Department of Physics, RTM Nagpur University
摘 要：BaGdB9O16:Eu3+ and Ba（Gd,Ln）B9O16:Eu3+（Ln=La, Y） phosphors were synthesized by solid state diffusion method. The X-ray diffraction, scanning electron microscopy（SEM） and photoluminescence properties were investigated. The as-synthesized BaGdB9O16:Eu3+ and Ba（Gd,Ln）B9O16:Eu3+（Ln=La, Y） phosphors showed strong red emission under ultraviolet light excitation. By partially substituting Gd3+ by La3+ and Y3+ ions in the host BaGdB9O16:Eu3+ materials, the maximum emission intensity was observed for the optimum composition of BaGd0.91La0.8B9O16Eu0.01 phosphor. The experimental results indicated that the Eu doped BaGdB9O16 and Ba（Gd,Ln）B9O16（Ln=La, Y） phosphors were promising red phosphors, which might find potential applications in near-UV excited LED lighting as well as display devices. Comparison of as-synthesized phosphors with standard phosphor used in CFL（compact fluorescent lamp） was also done. Energy transfer mechanism of Gd3+ to Eu3+ was also discussed in this paper.
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