Activation of KZr2(PO4)3 Nanophosphor with Dy3+ ions to Demonstrate its Optical and Spectral Properties

In the present study, the synthesis, structural, electronic, and optical characteristics of Dy3+-doped KZr2(PO4), nanophos- phors are investigated. X-ray diffraction is used to investigate the structural conformation, which is found to be rhombohedral in phase. The elemental presence of K, Zr, P. O, and Dy is confirmed by x-ray photoelectron spectroscopy (XPS) studies in the KZr2 (PO4)(3), sample. Using photoluminescence (PL) spectroscopy, the variation in the PL spectrum due to the incorpo- ration of Dy+ ions is effectively studied. The analytical formula based on Dexter's theory is used to analyze the process of concentration quenching; results show that it is attributable to the quadrupole-quadrupole interaction, and the maximum Dy-3+ concentration is observed at 1.5 mol.%. A value of 4.52 eV is found for the optical direct bandgap. These findings indicate the phosphor may be used in solid-state lighting applications as white light-emitting diodes (WLEDs) when stimulated by a near-UV source of 348 nm, since its CIE coordinates are comparable to those of white light.