Probing local environments in Eu3+ doped SrSnO3 nano-rods by luminescence and Sr K-edge EXAFS techniques

Abstract Detailed luminescence studies on Eu 3+ doped SrSnO 3 nano-rods having body centered tetragonal structure, confirmed that up to 1.5 at% Eu 3+ ions occupy Sr 2+ site in the lattice and is having a less polarisable environment. Experimentally obtained Judd–Ofelt parameters ( Ω 2 and Ω 4 values) can be effectively used to monitor the extent of incorporation of Eu 3+ ions at Sr 2+ site. Based on Rietveld refinement of diffraction patterns and Sr K-edge EXAFS studies, it is inferred that average Sr–O and Sn–O bond lengths in SrO 12 and SnO 6 polyhedra increase with incorporation of relatively smaller Eu 3+ at Sr 2+ site in SrSnO 3 lattice.