Structural and Thermoluminescence Glow Curve Analysis of Eu3+-Doped LaCePO4 Phosphor

Abstract

Europium ion (Eu³⁺) doped lanthanum cerium phosphate is synthesized using the solid-state reaction method. Phase purity and morphology are assessed via XRD and SEM, respectively. The XRD analysis shows a monophasic crystalline structure with the average crystallite size of 87 nm. SEM images show a tablet-like morphology of phosphor. FTIR spectroscopy confirms the phosphor formation based on stretching, bending, and vibrational modes. The photoluminescence excitation spectrum demonstrates a broad excitation band centered at 277 nm, while emission spectra exhibit narrow luminescent bands at 469 and 544 nm, attributed to intracenter transitions of Eu³⁺. The thermoluminescence glow curve analysis is performed for the optimized doping ion concentration, and trap parameters are obtained using the computerized glow curve deconvolution technique. These investigations suggest the potential utility of the prepared phosphor for bluish-green emission in diverse display applications, while the trap analysis elucidates the formation of luminescence centers in Eu³⁺-doped phosphors.