Highly efficient stable oxynitride phosphor

摘要

Phosphor from the class of the oxynitridosilicates, having a cation M which is doped with divalent europium, and having the empirical formula MSi₂O₂N₂, where M=Sr_1-x-yCa_yEu_x where 0.3≦x+y≦0.725, with a Ca/Eu ratio of 1, the oxynitridosilicate having an emission with a dominant wavelength in the range from 555 to 568 nm.