Combustion synthesis and photoluminescence properties of Eu³⁺ activated Y₂Zr₂O₇ nano phosphor

Series of Y₍2_−x)Zr₂O₇:xEu³⁺ red-emitting phosphors have been synthesized by a combustion route and their structures and photo-luminescent properties have been investigated at room temperature. Powder X-ray diffraction analysis shows structural purity of as-synthesized phosphor. Topographical study of prepared sample is done through scanning electron microscopy. Emission spectra show an intense red emission at 609 nm due to 5D0 → 7F2 transition of Eu³⁺. Intensity of 5D0 → 7F2 emission (activated at wavelength of 264 nm) is found to increase with the doping concentration of Eu³⁺. Under UV excitation, Y₂Zr₂O₇:Eu³⁺ shows emission in red region corresponding to 5D1 → 7F2 transition of Eu³⁺ ion. The emission spectra exhibit red performance (CIE chromaticity coordinates: x = 0.662, y = 0.337), which is due to 5D0 → 7FJ transitions of Eu³⁺ ions. (author)