Investigation on Synthesis and Property of Tb3+/Dy3+ Co-Doped Gd3Al5O12 Phosphor

Xin Teng; Bin Li; Jin Kai Li; Guang Bin Duan; Zong Ming Liu

doi:10.4028/www.scientific.net/KEM.726.261

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 726Investigation on Synthesis and Property of...

Investigation on Synthesis and Property of Tb³⁺/Dy³⁺ Co-Doped Gd₃Al₅O₁₂ Phosphor

Abstract:

The (Gd_0.9-_xTb_0.1Dy_x)₃Al₅O₁₂ (x=0-0.04, GdAG:Tb³⁺/Dy³⁺) solid solution was acquired by calcining their respective precursor prepared via co-precipitation method at 1500 °C. The performance of GdAG:Tb³⁺/Dy³⁺ powders was characterized by combined technology of Fourier transform infrared absorption spectra (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and photoluminescence (PL) spectrum analyses. The metastable Gd₃Al₅O₁₂ could be stabilized by doping smaller Tb³⁺ ions of 10 at.%. Under the optimal UV excitation of 275 nm, the GdAG:Tb³⁺/Dy³⁺ phosphors exhibit vivid green emission at 548 nm which were attributed to the ⁵D₄→⁷F₅ transition of Tb³⁺. The CIE chromaticity coordinate was determined at (~0.32, ~0.48) with the color temperature of ~5872 K. Compared to the Dy³⁺-free (Gd_0.9Tb_0.1)AG phosphor, the emission intensity of Dy³⁺-doped phosphors display stronger owing to the efficient energy transfer from Dy³⁺ to Tb³⁺. The optimal amount of Dy³⁺ in GdAG:Tb³⁺/Dy³⁺ phosphors was determined to be ~2.5 at.% (x=0.025). The GdAG:Tb³⁺/Dy³⁺ phosphors developed in present work are expected to be a new type of green phosphor widely used in the lighting and display areas.

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Key Engineering Materials (Volume 726)

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261-265

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https://doi.org/10.4028/www.scientific.net/KEM.726.261

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January 2017

Authors:

Xin Teng, Bin Li, Jin Kai Li*, Guang Bin Duan, Zong Ming Liu

Keywords:

Energy Transfer, Garnet Phosphors, Lattice Structure Stabilization, Luminescent Property

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