Influence of electron beam irradiation on structural, thermo and photoluminescence properties of SrTiO3:Sm3+ nanophosphor

Abstract SCS is employed for the synthesis of SrTiO3:Sm3+ (0-11 mol%) nanophosphors. PXRD patterns are in line with the standard JCPDs number 35-0734 confirmed the formation of crystalline SrTiO3:Sm3+ phosphor. Further, the synthesized samples are irradiated by 9 MeV electron beam (10-50 kGy) and analysed using (FTIR) and Raman spectroscopic studies to understand the change in chemical properties. PL spectra of pristine sample exhibited emission peaks at 552, 607 and 732 nm wherein irradiated samples 552 and 732 nm peaks vanishes due to loss of crystallinity by irradiation. Further, two TL glow peaks were observed at 192 and 358 °C in E-beam irradiated samples which shows linear L response with dose. The linear TL response was attributed to release of more number of charge carriers and trap density. The kinetic parameters estimated shows simple trap distribution making SrTiO3: Sm3+(3 mol %) nanophosphor good material for radiation dosimetry applications.