| 摘要 |
Provided is an oxynitride phosphor powder, which is an ±-SiAlON phosphor having a dominant wavelength of 565-577 nm and fluorescence intensity and external quantum efficiency that are high enough for practical use. This oxynitride phosphor powder comprises an ±-SiAlON represented by the compositional formula: Ca x1 Eu x2 Yb x3 Si 12 - (y+z )Al (y+z )O z N 16-z (wherein 0.0 < x1 ‰¤ 2.0, 0.0000 < x2 ‰¤ 0.0100, 0.0000 < x3 ‰¤ 0.0100, 0.4 ‰¤ x2/x3 ‰¤ 1.4, 1.0 ‰¤ y ‰¤ 4.0, 0.5 ‰¤ z ‰¤ 2.0). |
