Downshifting photoluminescence of Erbium doped NaSrZrO 3 for solid-state lighting

The synthesis of novel nanophosphors exhibiting unique morphologies with high purity, stability, ecofriendliness, and a high color rendering index is crucial to meet the demands of contemporary solid -state lighting energy devices. In this investigation, we successfully synthesized Na 0.2 Sr 0.9-x ZrO 3 : x Er 3+ perovskite nanophosphors. All samples manifested an orthorhombic structure. The crystallite size was observed to increase with rising concentrations of Er 3+ . The optical band gap exhibited a range of 5.19 eV to 5.36 eV with increments in doping concentration, signifying alterations in the lattice constants attributable to crystalline disorder. The downshifting PL spectra revealed both host emission bands and dopant (Er 3+ ) emission lines. The violet - blue band was attributed to crystalline disorder while the red emission band was assigned to octahedra tilting disorder in the perovskite. The presence of Er 3+ ion lines at 523 and 546 nm produced intense green light, as depicted in the CIE chromaticity diagram for all doped samples. The study affirms that the phosphors synthesized in this research possess potential for application in the development of visible green lamps for optical display devices and solid -state lighting.