| abstract |
The present invention relates to a phosphor that satisfies requirements (1) to (3): n(1) the phosphor satisfies Formula [2] and/or Formula [3]: 85 ‰ R 455 125 / R 455 R 25 × 100 ‰ 110 92 ‰ R 405 100 / R 405 R 25 × 100 ‰ 110 nwherein R 455 (125) represents an emission peak intensity when the phosphor is excited by light having a peak wavelength of 455 nm at 125°C, n(2) the emission peak wavelength is in the range of 570 nm to 680 nm, and n(3) the full width at half maximum of an emission peak is 90 nm or less. The phosphor of the present invention has a high luminous efficiency and emits light of orange to red with high luminance. The use of the phosphor makes it possible to produce a light-emitting device, an illumination apparatus, and an image display, having a high efficiency and excellent color rendering properties. |