<p>Down-conversion phosphors significantly improve the efficiency of optoelectronic devices, especially in light-emitting diodes (LEDs) and photovoltaic cells. In this work, Sr₃Al₂O₆ phosphors doped with rare-earth ions Dy³⁺ and Tb³⁺ were synthesized using a wet chemical method. The crystal structure and luminescence properties of phosphors were thoroughly studied. XRD analysis confirmed the formation of a single-phase cubic Sr₃Al₂O₆ structure. Crystallite size (D) determined to be 18.57&#xa0;nm. Photo-luminescent studies showed characteristic emissions of Dy³⁺ (yellow and blue bands) and Tb³⁺ (green emission). The FE-SEM observations indicated that the Sr₃Al₂O₆ phosphor. The Sr₃Al₂O₆ phosphor exhibits tunable color properties due to characteristic transitions of Dy³⁺ and Tb³⁺ ions. The emission spectrum shows characteristic peaks attributed to Dy³⁺ transitions (486&#xa0;nm and 578&#xa0;nm) and Tb³⁺ (492&#xa0;nm, 574&#xa0;nm, 585&#xa0;nm, and 620&#xa0;nm). The PL decay measurements revealed lifetimes of τ = 2.965856 µs for Dy³⁺ and τ = 3.013946 µs for Tb³⁺ in the Sr₃Al₂O₆ host. These results suggest potential applications in lighting and display technologies.</p>