A thin film phosphor for an electroluminescent device, the phosphor being selected from the group consisting of thiasluminates, thiogallates and thioindates having at least one cation selected from elements of Groups IIA and IIB of the Periodic Table of Elements. The phosphor being activated by a rare...http://www.google.de/patents/US6982124?utm_source=gb-gplus-sharePatent US6982124 - Yttrium substituted barium thioaluminate phosphor materials
