Wet chemical synthesis of Ce3+ activated fluoro-elpasolite and related fluoro-aluminate phosphors

Abstract New results on synthesis and luminescence of Ce 3+ activated fluoro-elpasolites and some related fluoroaluminates are presented. Wet chemical synthesis of fluoroaluminates with elpasolite (K 2 NaAlF 6 ) structure and related fluorides such as simmonsite Na 2 LiAlF 6 and pyrochlore derived rhombohedral phases Cs 2 NaAl 3 F 12 is described. Ce 3+ activation also could be achieved using the simple procedure. Intense Ce 3+ emission in ultraviolet region could be observed in the fluoro-aluminates prepared by wet chemical method, without resorting to any thermal treatment except for that required for drying. The method will provide a simple route for preparing this important class of materials.