Photoluminescence Characteristics of Sr3SiO5:Eu2+ Yellow Phosphors Synthesized by Solid-State Method and Pechini Process

Yellow-emitting Sr 3-x Eu x SiO 5 (x = 0∼0.1) phosphors were synthesized by solid-state reaction method and Pechini process, and the phase, morphology, photoluminescence (PL) properties were investigated. In solid-state method, Sr 3 SiO 5 was obtained with a small amount of Sr 2 SiO 4 , but a single phase Eu-doped Sr 3 SiO 5 was realized at 1600°C in Pechini process. The phosphor prepared by Pechini process had a rather round shape with a smooth surface and a smaller size distribution. The obtained Sr 3-x Eu x SiO 5 phosphors exhibited a strong emission at 581 nm under the excitation of λ exc = 460 nm. The highest PL intensity was observed in Sr 3-x Eu x SiO 5 (x = 0.05) prepared by Pechini process at 1600°C. The obtained PL properties were discussed in terms of phase purity, particle size and shape, surface roughness, and effect of concentration quenching. In addition, the temperature dependence of the PL intensity and the emission characteristics of white light-emitting InGaN-based Sr 3-x Eu x SiO 5 LED were compared with those of commercial YAG:Ce 3+ phosphor.