Preparation and Photoluminescence Properties of Green-Emitting LiYb_1-xTb_x(MoO₄)₂(x = 0.01-1) Phosphors

Abstract:

s. Tb³⁺-doped LiYb_1-xTb_x(MoO₄)₂ (x = 0.01-1) solid solutions were prepared by solid state reaction. Structural of the solid solution series was carried out by X-ray powder diffraction. By increasing the Tb³⁺concentration, the XRD results reveal that LiYb_1-xTb_x(MoO₄)₂ adopt a tetragonal structure with space group of I4(No. 82) and transfer to tetragonal structurewith space group of P41/a (No.88) systemically. The emission and excitation spectra were employed to characterize the synthesized phosphors. Theexcitation spectra showed that LiYb_1-xTb_x(MoO₄)₂ can be efficiently excited by the lights of 250-500 nm, which well match with the emission wavelength of near-UV and blue LEDs chips. The phosphor showed bright green luminescence peaking at around 545 nm under the excitation at 266 nm and 490 nm.The Luminescence intensities are investigated under different Tb³⁺ concentrations. The luminescence decay and the color coordinates were also discussed in order to further investigate the potential applications.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 496-501
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.496
• Online since: April 2016
• Authors: Xue Bin Qiao, Hyo Jin Seo
• Keywords: LiYb_1-xTb_x(MoO₄)₂, Luminescence, Phosphor, Solid Solution

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