Influence of calcination temperature on the luminescent properties of Eu³⁺ doped CaAl₄O₇ phosphor prepared by Pechini method.

Motivated by the need for new phosphor for white light emitting diode (WLED) applications, CaAl₄O₇ phosphors activated by Eu(3+) rare earth ion was synthesized using the Pechini method at different calcination temperatures. The crystal structure and luminescent properties were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence spectroscopy (PL). The XRD and SEM patterns confirm the presence of a single grossite monoclinic phase (311) and the particles exhibit good crystallinity and the particle size varies with calcination temperature.