The present paper reports the synthesis and Photoluminescence (PL) study of the Y3Al5O12 phosphor doped with Eu(2.5 mol %) monitoring at 400nm, and shows emission peak at 254 nm. The phosphor was synthesized using the standard solid state reaction technique and ground using mortar and pestle, fired at 1200o C for 3 hour with heating rate of 5o C/min in a muffle furnace. The powder phosphors were characterized by X-ray diffraction and Scanning electron microscopy. The Photoluminescence (PL) excitation spectra were recorded for different Eu concentrations of (0.5 – 3.0 mol %) and shows emission peaks at 365, 399, 469, 535, 592, 610 and 631 nm with good intensity, these are mainly due to Eu3+ electron transitions. When Eu concentration increases all the Eu3+ emission intensities increases linearly. After 2.5% Eu in the host Y3Al5O12 phosphor the intensity decreases. This is due to standard quenching effect.
