| abstract |
The present invention provides an oxynitride phosphor power having a fluorescence peak wavelength of 580 to 605 nm, the oxynitride phosphor having a higher external quantum efficiency than ever before. The oxynitride phosphor powder of the present invention is an oxynitride phosphor powder containing ±-SiAlON and aluminum nitride, represented by the composition formula: nCa x1 Eu x2 Si 12-(y+z) Al (y+z) O z N 16-z n(wherein x1, x2, y and z are 0<x1¤2.50, 0.01¤x2¤0.20, 0<y¤2.3 and 1.5¤z¤3.5, or x1, x2, y and z are 0<x2¤2.70, 0.05¤x2¤0.20, 2.3¤y¤5.5 and 1¤z¤2.5). Also, the present invention provides a method for producing the above-described oxynitride phosphor. |