New Green and Red Phosphors for White LEDs

High-luminous green phosphors and a red phosphor have been newly developed for white LEDs. The developed green phosphors are Ca3(Sc,Mg)2Si3O12:Ce made by replacing with Mg a part of Sc of green phosphor Ca3Sc2Si3O12:Ce, a new green phosphor CaSc2O4:Ce, and a new host material doped with a rare-earth element, Ba3Si6O12N12:Eu. The new red phosphor is (Sr,Ca)AlSiN3:Eu made by replacing a part of Ca of CaAlSiN3:Eu with Sr.