Fabrication of YAG: Ce³⁺ and YAG: Ce³⁺, Sc³⁺ Phosphors by Spark Plasma Sintering Technique

In this study, a single-doped phosphors yttrium aluminum garnet (Y₃Al₅O₁₂, YAG): Ce³⁺, single-doped YAG: Sc³⁺, and double-doped phosphors YAG: Ce³⁺, Sc³⁺ were prepared by spark plasma sintering(SPS) (lower than 1 200 °C). The characteristics of synthesized phosphors were determined using scanning electron microscopy (SEM), X-ray diffraction (XRD), and fluorescence spectroscopy. During SPS, the lattice structure of YAG was maintained by the added Ce³⁺ and Sc³⁺. The emission wavelength of YAG: Ce³⁺ prepared from SPS (425–700 nm) was wider compared to that of YAG: Ce³⁺ prepared from high-temperature solid-state reaction (HSSR) (500–700 nm). The incorporation of low-dose Sc³⁺ in YAG: Ce³⁺ moved the emission peak towards the short wavelength.