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

Solution combustion synthesis (SCS) is employed for the synthesis of SrTiO3:Sm3+ (0−11 mol%) nanophosphors. The Powder X-ray diffraction (PXRD) confirms the formation of highly crystalline SrTiO3:Sm3+ nanophosphor assigned to the which was athe standard JCPDs number card 35-0734. Further, the synthesized samples are irradiated by 9 MeV electron beam (10–50 kGy) and analysed using Fourier Transform Infrared (FTIR) spectroscopy and Raman spectroscopic studies to understand the change in chemical properties. PL spectra of pristine sample exhibits 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 are observed at 192 and 358 °C in E-beam irradiated samples which shows linear L response with dose. The linear TL response is 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. © 2020 Elsevier GmbH