A luminescent double perovskite phosphor Sr 2 YNbO 6 doped with Eu 3+ crystallized to the monoclinic phase and was synthesized successfully via a conventional hightemperature combustion method. The formation of the crystal structure, phase purity, and surface morphology were studied using X-ray diffraction patterns and scanning electron microscopy. The characteristic vibrations between the atoms of the functional groups present in phosphor were studied using Fourier transform infrared spectra analysis. The luminescence properties of the prepared phosphors were investigated in terms of photoluminescence (PL) and thermoluminescence (TL).PL excitation spectra exhibited charge transfer bands and the characteristic 4f 6 transitions of Eu 3+ . A prominent PL emission was obtained for the phosphor doped with 4 mol% Eu 3+ under the 396 nm excitation wavelength. PL emission quenching was
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