| abstract |
Disclosed are an oxynitride phosphor and a light-emitting device which are improved in luminous efficiency and emission intensity. A SiAlON phosphor (7) is composed of an oxynitride phosphor represented by the general formula of CaX(Si,Al)12(O,N)16: Eu2+y wherein x is not less than 0.75 and not more than 1.0 and y is not less than 0.04 and not more than 0.25. The main phase of the oxynitride phosphor has an alpha-sialon crystal structure. |