| abstract |
Provided is a phosphor whose luminance is improved as compared with a conventional β-sialon phosphor. By including Al, O (oxygen), and Eu at specific concentrations in the manufactured β-sialon phosphor, a phosphor in which the luminance of the phosphor is improved is provided. That is, a β-type sialon phosphor containing Si, Al, O, N, and Eu, wherein the Al concentration in the phosphor is 0.80 mass% or more and 2.25 mass% or less, and the O concentration is 0.36 mass% or more and 1.15 mass% or less, Eu concentration is 0.40 mass% or more and 0.80 mass% or less, and the ratio of Al concentration to O concentration (Al / O) is 2 Provided is a phosphor characterized by being from 0.0 to 3.0. |