Luminescence Characteristics of Ca ۱-xZrx/۲TiO ۳:x/۲Eu۳+ Phosphor for White Light-emitting Diodes and Photocatalytic Degradation of Polluting Organic Dyes

The present study investigated the crystal structure, temperature-dependent luminescence, and photocatalytic properties of Ca۱-xZrx/۲TiO۳:x/۲Eu۳+ phosphors for their potential applications in WLEDs and environmental remediation. The phosphors were synthesized using a solution combustion method with varying concentrations of Zr⁴⁺ and Eu³⁺ dopants to optimize their structural and optical properties. X-ray diffraction and SEM were also used to characterize the phosphors. X-ray diffraction analysis confirmed the perovskite crystal structure of the phosphors, with a slight distortion observed at low doping levels. Photoluminescence spectra revealed strong emission at ۶۱۷ nm, corresponding to the red-light band, indicating the phosphors’ potential for WLEDs. The synthesized Ca۱-xZrx/۲TiO۳:x/۲Eu۳+ phosphors demonstrated significant photocatalytic activity in the degradation of toxic organic dyes, specifically methylene blue (MB) and crystal violet (CV), under visible light irradiation. The photocatalytic efficiency was found to be highest for CV, with a degradation rate of ۹۶.۰۱%, compared to ۷۰.۶۳% for MB. These findings highlight the excellent potential of these phosphors for both lighting and environmental applications. The present study offers valuable insights into the design of efficient, eco-friendly phosphors for WLEDs and the degradation of harmful pollutants, contributing to sustainable lighting solutions and environmental remediation efforts.

کلیدواژه ها:

Ca۱-xZrxTiO ۳:xEu۳+ ، photoluminescence ، photocatalysis ، methylene blue ، crystal violet