Optical Characteristics and Judd-Ofelt Analysis of Dy3+-Activated Bismuth Oxychloride Phosphors for Potential Applications in WLEDs, Optical Thermometry, and Forensic Sciences
来源：ACS Publications
Designing iconic WLEDS derived from a single host has bestowed an impetus to the synthesis of Dy3+-activated bismuth oxychloride (BiOCl) phosphors via a facile solid-state method. The insights of crystal structure were confirmed using X-ray diffraction analysis and the Rietveld refinement method. The investigation of the UV–vis-NIR spectra extended the characteristics of bonding structures and radiative emission of the samples. The photoluminescence spectrum reveals the feasibility of white light generation harnessing the luminescence characteristics of Dy3+ with a critical concentration of 2 mol %. The photometric characteristics of the sample at critical concentration suggested color coordinates of (0.29, 0.33), CCT of 6864 K, and LER of 304 lm/W. Furthermore, the ultrahigh Internal Quantum Efficiency (IQE) of 96.39% exhibited by the optimized sample gives notable insight for future investigations in the fields of robust and sustainable optoelectronic applications. The synthesized phosphor demonstrated a better temperature sensitivity over 303–483 K while utilizing temperature-dependent photoluminescence for different modes of analysis. In addition, the high adhesion property of the prepared phosphors allows a precise recognition of multilevel ridge and groove patterns in fingerprint and lip print detection, establishing their outstanding utility in forensic sciences.