| abstract |
Inorganic oxynitride phosphors containing alkaline earths emit light with a longer wavelength orange or red than the conventional rare earth activated sialon phosphors, and emit chemically stable minerals. Provide a phosphor. This provides a lighting device excellent in color rendering and a light emitting device of an image display device having excellent durability.n n n The solution includes AO (where A is one or two or more elements selected from Mg, Ca, Sr and Ba, and AO is an oxide of A), Si 3 N 4 , and SiO 2 . Composition on pseudo ternary state diagram as a component,n n n n n n n n At least one metal element M (wherein M is Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb) in a composition satisfying all of the above conditions ) Is provided to provide a basic phosphor. |