| 摘要 |
The embodiment provides a green light-emitting fluorescent substance having high quantum efficiency and also a light-emitting device comprising that substance so as to less undergo color discrepancies. The fluorescent substance is generally represented by (Sr 1-x EU x ) 3-y Al 3+z Si 13-z O 2+u N 21-w , and is a kind of the Sr 3 Al 3 Si 13 O 2 N 21 phosphors. This substance also gives an X-ray diffraction pattern having a diffraction peak at 2¸ of 15.2 to 15.5° and the half-width thereof is 0.14° or less. Further, the substance emits luminescence having a peak within 490 to 580 nm when excited by light of 250 to 500 nm. The light-emitting device provided by the embodiment comprises that substance in combination with a light-emitting element and a red light-emitting fluorescent substance. |
