Structural and Luminescent Properties of Dy(III) Doped Ca_0.5Bi₃P₂O₁₀ Nanophosphors for Solid-State Lighting & Latent Fingerprinting Applications

An efficient urea-assisted SC (solution-combustion) approach was used to synthesize a novel series of doped Ca_0.5Bi₃P₂O₁₀: xDy³⁺ nanophosphors (0.01–0.1 mol). The powdered materials were thoroughly investigated using structural and optical measures. 'Rietveld refinement' investigations found that the produced nanophosphor formed a triclinic system with the P -1 triclinic space group. An EDS (energy-dispersive spectral) study was conducted to determine the corresponding proportions of constituent elements of doped nanophosphors. The TEM (transmission electron microscopy) revealed aggregated particles with a standard size on the nanoscale. The PLE (Photoluminescence excitation) spectrum indicates that the indicated phosphors can be stimulated by NUV (near ultraviolet) illumination sources. The Dy³⁺-ions undergo transitions from (⁴F_9/2 → ⁶H_15/2 & ⁴F_9/2 → ⁶H_13/2) were recognized as (PL) spectra with an excitation of 353 nm revealed the presence of blue-yellow bands at 481, and 577 nm, correspondingly. Further, PL data was used to determine photometric metrics such as CCT (correlated color-temperature), CC (chromaticity-coordinates (x & y)), and CP (color-purity (%)), supporting their use in solid-state lighting and latent fingerprinting applications.