Synthesis and Characterization of CaYSi₂Al₂O₂N₅:Eu²

Eu²⁺-activated CaYSi₂Al₂O₂N₅ phosphors have been prepared by the modified three-step solid-state diffusion method. Prepared phosphors are characterized by XRD, SEM, photoluminescence techniques, and chromatic properties. Upon excitation at 330 nm, the Eu²⁺-activated CaYSi₂Al₂O₂N₅ phosphor shows a single strong broad emission at 455 nm in the blue region of the optical spectrum. The variation of intensity with dopant concentration was studied, and the quenching was observed at 1 mol%. The Stokes shift is also calculated. It was found that the obtained samples may be suitable for UV-excited white light-emitting diodes.