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

In the present study, the successful synthesis of a series of Sm3+ doped Li2SrSiO4 (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. Sm3+ doped Li2SrSiO4 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 Sm3+ 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, Tm – Tstop method and Ea – Tstop 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:Sm3+ phosphor for UVC dosimetry, marking a significant contribution to the understanding of its TL properties and defect states.