Unveiling the Potential of Sm³⁺ Doped Li₂SrSiO₄ Phosphor for UVC Dosimetry: Comprehensive Analysis with Synthesis, Morphological, Elemental and Thermoluminescence Studies

Abstract

In the present study, the successful synthesis of a series of Sm 3+ doped Li 2 SrSiO 4 (LSS) phosphors using the solid-state reaction method was done. Phase identification, morphological and elemental analysis was investigated using X-ray diffraction, FESEM and EDX analyses, respectively. The experiments provided the proof of existence of constituent elements and surface morphology of phosphor under different magnification. Sm 3+ doped Li 2 SrSiO 4 phosphor's thermoluminescence properties are reported for the first time. Thermoluminescence experiments were conducted, and the highest intensity was observed at 1 mol % doping concentration of Sm 3+ contained a single glow curve at ∼238 °C. Furthermore, the study revealed that TL intensity exhibited a linear relationship with UV−C irradiation, and also, repeatability, fading, and filter analysis were probed. Fading tests, T m − T stop method and E a − T stop methods suggested the existence of a single trap. Various other methods were performed to evaluate the kinetic parameters and their reliability in estimating trapping parameters for a single glow curve. These findings collectively support the potential of LSS:Sm 3+ phosphor for UVC dosimetry, marking a significant contribution to the understanding of its TL properties and defect states.