| 摘要 |
The present invention aims at providing a chemically stabilized inorganic phosphor having an orange or red emission characteristic at higher luminance, and a light emitting instrument adopting the phosphor, for a lighting instrument excellent in color rendering property and for an image displaying apparatus excellent in durability. The solving means resides in provision of a fundamental phosphor comprising:
a crystal represented by A 2 Si 5 - x Al x O x N 8-x (A is a mixture of one kind or two or more kinds of element(s) selected from Mg, Ca, Sr, and Ba; and x is a value between 0.05 inclusive and 0.8 inclusive); and
a metallic element M (M is one kind or two or more kinds of element(s) selected from Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb) dissolved, in a solid state, in the crystal. |
