| 摘要 |
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:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒCa x1 Eu x2 Si 12-(y+z) Al (y+z) O z N 16-z
(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. |
