Patel, D. K.; Nuwad, J.; Rajeswari, B.; Vishwanadh, B.; Sudarsan, V.; Vatsa, R. K.; Kadam, R. M.; Pillai, C. G. S.; Kulshreshtha, S. K. (ChD;RCD;MSD;KMG)
Source
Materials Research Bulletin, 2013. Vol. 48 (2): pp. 566-573
ABSTRACT
Blue light emitting SrSn(OH)6 nano-rods were prepared in aqueous medium at room temperature. Presence of lanthanide ions in reaction medium during synthesis of nano-rods, leads to significant changes in the morphology of the nano-rods. Based on luminescence studies emission in the blue region from SrSn(OH)6 nano-rods has been attributed to radiative recombination of self trapped excitons in the lattice. SrSn(OH)6 nano-rods were doped with lanthanide ions like Eu3+, Tb3+ and Dy3+ and their luminescence studies revealed that there exists energy transfer from host to lanthanide ions. From the luminescence studies on Eu3+ doped samples, it is confirmed that up to 1.5 at%, Eu3+ ions get incorporated at Sr2+ site in SrSn(OH)6 lattice and beyond which a separate Eu3+ containing phase is formed. Part of the europium ions also exists as Eu2+ species in the lattice as confirmed by electron paramagnetic resonance (EPR) studies.