RESUMO
Eu(3+)-doped Na3Gd(PO4)2 phosphors were synthesized by the modified citrate gel combustion technique. From the XRD pattern, structure of the compound was found to be orthorhombic with a particle size of 10-20nm. The emission spectra revealed that the Na3Gd(PO4)2:Eu(3+) phosphors can be excited effectively by 394nm pump wavelength. From the concentration dependent photoluminescence studies, the optimum concentration for efficient luminescence of Eu(3+) ions in Na3Gd(PO4)2 phosphor has been found to be 1.5mol%. Decay curves of the (5)D0 level of Eu(3+) ions were recorded by monitoring the emission at 596nm corresponding to (5)D0â(7)F1 transition and are found to be single exponential for all the concentrations. The chromaticity properties for different concentrations of Na3Gd(PO4)2:Eu(3+) nanophosphors were calculated from emission spectra and analyzed in the frame work of CIE color diagram.
