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The current study comprises the synthesis, characterization, electrochemical, and photoluminescence studies on La1-xDyxOCl (0 ≤ x ≤ 0.09) compound by the solid-state method which exhibits a tetragonal phase. The synthesized materials bandgap is determined to be between 4.16 and 4.26 eV. The presence of Lead and Tin in a 0.1M KOH solution was detected using a modified carbon paste electrode of La0.95Dy0.05OCl. Because of the lower value of EO-ER, the cyclic voltammetry (CV) results imply that La0.95Dy0.05OCl has improved electrochemical characteristics. This La0.95Dy0.05OCl material may be a good electrode for sensing molecules like Lead and Tin. The samples radiated white light owing to major two emission bands corresponding to the 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 transitions. Judd–Ofelt parameters Ω2 and Ω4 and other radiative parameters are evaluated. The CIE chromaticity coordinates are close to the white emission standards set by NTSC, hence present phosphors may be useful in the development of WLEDs.