| 摘要 |
According to one embodiment, the phosphor exhibits a luminescence peak within a wavelength range of 500 to 600 nm when it is excited with light having an emission peak within a wavelength range of 250 to 500 nm. The phosphor has a composition represented by (M 1-x Ce x ) 2y Al z Si 10-z O u N w B s (M represents Sr and a part of Sr may be substituted by at least one selected from the group consisting of Ba, Ca and Mg; and x, y, z, u, w and s satisfy 0 < x ‰¤ 1, 0.8 ‰¤ y ‰¤ 1.1, 2 ‰¤ z ‰¤ 3.5, 1 < u ‰¤ 1, 1.5 ‰¤ z - u, 13 ‰¤ u + w ‰¤ 15, and 0 < s < 0.245.) |
