Fig. 1. XRD patterns，rietveld refinement and crystal structure schematic diagram of（Y_0.7）₆TeO₁₂：0.3Eu³⁺ phosphor

Fig. 2. SEM image and grain size distribution of（Y_0.7）₆TeO₁₂：0.3Eu³⁺ phosphor

Fig. 3. Diffuse reflection spectra of（Y_0.7）₆TeO₁₂：0.3Eu³⁺ phosphors. The inset presents curves for［F（R）hn］^1/2 versus hn

Fig. 4. Excitation（left black line，λ_em=632 nm）and emission（right red line，λ_ex=393 n m）spectra of（Y_0.7）₆TeO₁₂：0.3Eu³⁺ phosphors

Fig. 5. Emission spectra of（Y_1-x）₆TeO₁₂：xEu³⁺ with different doping concentrations（x=0.1~0.5，λ_ex=393 nm），the inset shows the relationship between integral luminescence intensity and doping concentrations x

Fig. 6. The relationship between lg（I/x）and lg x of integral luminescence intensity I and doping concentrations x

Fig. 7. Emission spectra of（Y_0.7）₆TeO₁₂：0.3Eu³⁺ phosphors at different temperatures（the inset shows the relationship between ln［I₀/I_T-1］and 1/（k_BT））

Fig. 8. Decay curves of（Y_1-x）₆TeO₁₂：xEu³⁺ phosphors

Fig. 9. Electroluminescent spectrum，relevant chromaticity coordinates and photographs of the fabricated red LED