Fig. 1. (a) XRD of different concentrations of Eu³⁺ single-doped Sr₃Y₂(BO₃)₄ samples; (b) XRD patterns of samples co-doped with Sr₃Y₂(BO₃)₄ with different concentration ratios of Eu³⁺/Dy³⁺

Fig. 2. (a) Sr₃Y₂(BO₃)₄ Matrix; (b) Sr₃Y₂(BO₃)₄∶10%Eu³⁺ sample; (c) Sr₃Y₂(BO₃)₄∶SEM image of 5%Eu³⁺/5%Dy³⁺ sample

Fig. 3. (a) The excitation spectra of different doping concentrations of Eu³⁺ single-doped Sr₃Y₂(BO₃)₄ and the emission spectra of Sr₃Y₂(BO₃)₄∶10%Eu³⁺ under excitation at 395 and 466 nm; (b) The CIE chromaticity coordinates of Sr₃Y₂(BO₃)₄∶10%Eu³⁺ sample under excitation at 395 and 466 nm

Fig. 4. (a) Excitation spectrum of Eu³⁺/Dy³⁺ double-doped Sr₃Y₂(BO₃)₄ phosphor with different concentration ratio (λ_em=613 nm); (b) Emission spectra of double-doped Sr₃Y₂(BO₃)₄ phosphors under 395 nm ultraviolet excitation; (c) Emission spectra of 5%Eu³⁺ single-doped, 5%Dy³⁺ single-doped and 5%Eu³⁺/5%Dy³⁺ double-doped Sr₃Y₂(BO₃)₄ phosphors under 395 nm ultraviolet excitation; (d) Energy level transition diagram of Eu³⁺ and Dy³⁺; (e) CIE chromaticity coordinates of double-doped Sr₃Y₂(BO₃)₄ samples under 395 nm UV excitation