Synthesis of SrAl2O4: Dy3 and Eu2 as the Photoluminescence and Long-Lasting Properties

This study presents the synthesis and characterization of SrAl2O4 phosphors doped with Dy3+ and Eu2+ ions. The phosphors were prepared via the solid-state reaction method and their crystal structure was analyzed using X-ray diffraction (XRD). The surface morphology and microstructure were examined using scanning electron microscopy (SEM), while the luminescent properties were evaluated through photoluminescence (PL) emission spectra. The synthesized phosphors exhibited a uniform and compact morphology, with well-defined particles and high purity. Under UV excitation, the phosphors displayed intense emission peaks in the blue-green region of the spectrum. The emitted color could be tuned by adjusting the Eu2+:Dy3+ ratio, offering flexibility for specific application requirements. Additionally, the phosphors demonstrated excellent long-lasting luminescence properties, with sustained emission visible even after several minutes of UV excitation. These findings highlight the potential of SrAl2O4: Dy3+ and Eu2+ phosphors for various applications, particularly those requiring persistent emission in low-light conditions. The results contribute to the understanding of the synthesis, characterization, and potential applications of these phosphors, opening avenues for further research in the field.