Abstract
Here, we systematically investigate the structural and luminescent behaviour of Ba2+ co-doped BiOCl:Dy3+ nanophosphors synthesized by a cost-effective solid-state reaction method. The effect of Barium concentration on the structural and optical properties of Dy3+ doped BiOCl phosphors was examined in detail. The X-ray Diffraction (XRD) patterns and Rietveld refinement revealed that the as-prepared phosphors had a tetragonal crystal structure with the space group P4/nmm. X-ray Photon Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR), and Raman analysis unveiled the elemental composition and vibrational modes of the prepared sample and it directly confirms the incorporation of Dy3+ and Ba2+ ions into the BiOCl lattice. The effect of Ba2+ co-doping on photoluminescence of optimized BiOCl:2%Dy3+ was studied and, observed a remarkable enhancement in the emission intensity. The decay time obtained in microseconds implied the fast-switching response of the nanophosphors. The prepared nanophosphors at optimum concentration were used for the development and visualization of latent fingerprints (LFPs) and Cheiloscopy for individual identification in forensic science. Our results reveal that the synthesized nanophosphors have potential applications in the field of color displays and may act as a valuable tool for law enforcement.
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