Green, Orange, and Magenta Luminescence in Strontium Stannates with Perovskite-Related Structures

Intense green, orange or magenta luminescence was observed in rare-earth doped alkaline earth (Ca, Sr, and Ba) stannates, particularly strontium stannates with perovskite-related structures. Tb–Mg codoped SrSnO 3 showed sharp emission lines corresponding to Tb ions as a green phosphor. Sm doped Sr 3 Sn 2 O 7 exhibited sharp pairs of emission lines corresponding to Sm ions as an orange phosphor. Eu–Ti codoped Sr 2 SnO 4 as a magenta phosphor showed sharp red luminescent lines corresponding to Eu ions as well as a broad blue emission band corresponding to Ti-related complexes. It was suggested that codoping and/or layered structures in these phosphors are closely related to the increase in luminescence intensity from these rare-earth ions.