| abstract |
It is an object of the present invention to provide a phosphor with little decrease in emission intensity even at high temperatures. When excited by light having an emission peak in the wavelength range of 250 to 500 nm, the phosphor of the embodiment exhibits an emission peak in the wavelength range of 490 to 580 nm, and is represented by the following general formula (1). Having the composition represented. In X-ray diffraction by Bragg-Brendano method using Cu-Kα ray, the maximum peak diffraction peak intensity (I 31 ) generated at 2θ = 30.1 ° to 31.1 ° is 2θ = 25.0 ° to 26.26. It is characterized by being higher than the diffraction peak intensity (I 26 ) occurring at 0 °. (M 1-x Eu x ) 3-y Al 3 + z Si 13-z O 2 + u N 21-w (1) (Here, M is Sr, and a part of Sr may be substituted with at least one selected from Ba, Ca, Mg, and Na. X, y, z, u, and w each satisfy the following: 0 <x ≦ 1, −0.1 ≦ y ≦ 0.3, −3 ≦ z ≦ −0.52. −1.5 ≦ u ≦ −0.3; −3 <u−w ≦ 1) [Selection figure] None |