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  4. Synthesis and photoluminescence studies of Ba(Gd,Ln)B9O16:Eu3+(Ln=La,Y) phosphors for n-UV LED lighting and display devices

稀土学报(英文版), 2015, (2): 140-147. doi: 10.1016/S1002-0721(14)60394-X

V.V. Rangari 1, , S.J. Dhoble 2,

1.Department of Physics, RTM Nagpur University, Nagpur-440033, India

2.Department of Physics, RTM Nagpur University, Nagpur-440033, India

Synthesis and photoluminescence studies of Ba(Gd,Ln)B9O16:Eu3+(Ln=La,Y) phosphors for n-UV LED lighting and display devices

Keywords： phosphor

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 po-tential 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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