Structural, spectroscopic, photoluminescence quenching, and thermal stability analysis of trivalent dysprosium activated LiZnPO4 for solid-state lighting applications

[Display omitted] •The solid-state reaction method is used to create LiZn(1−x) Dyx3+PO4(x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, and 0.07) phosphors.•Rietveld Refinement analysis has been performed to examine the structure and different lattice parameters.•Bandgap analysis and bandgap fluctuations due to doping have been investigated.•Photoluminescence excitation and emission spectra have been studiedand the concentration quenching mechanism for LiZnPO4:Dy3+ has been explored.•For potential uses in SSL, optical properties, such as CIE coordinates, CCT coordinates, and CCT values were computed. This study used a solid-state reaction method to produce Dy3+-doped LiZnPO4 (LZP: xDy3+) white emitting phosphor material. This work offers a thorough examination of the thermal stability, luminescence characteristics, structural-spectroscopic characterization, and synthesis of LZP: xDy3+ (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, and 0.07) phosphors in an endeavor to develop phosphor materials for use in white-light-emitting diode (WLED) technology. The prepared phosphor material has been investigated through powder X-ray diffraction (XRD), Diffuse Reflectance (DR) spectra, Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Microscopy (FE-SEM), Photoluminescence emission (PL), and photoluminescence excitation (PLE) analysis. The findings of Rietveld Refinement (RR) analysis and powder XRD verify the phase purity and monoclinic structure of the generated phosphor. The energy band gap values are examined using DR spectra plots, and it is found that the observed values range from 3.1 to 3.2 eV. Using an excitation wavelength of 351 nm, photoluminescence emission spectra are recorded between 450 and 700 nm to investigate the emission properties of the resulting powders. Three distinctive peaks can be identified at 480 nm (blue band), 573 nm (yellow band), and a very less intense 667 nm (Red band), which correspond to 4F9/2 → 6H15/2, 6H13/2, and 6H11/2, respectively. The three emission bands fuse to produce a white light. The concentration quenching mechanism for LZP: xDy3+ was explored, and the dependency of luminescence intensity on Dy3+ concentration was examined. The color graphs of CIE show that the emission color is located in the white zone (0.3, 0.4), demonstrating the unique emission of the Dy3+-doped powders. It has been found that the CCT values obtained are approximately 5000 K, and the usual values for color purity are 90 %. The afore