| 摘要 |
<p>The embodiment of the present disclosure provides a phosphor exhibiting an emission peak in the wavelength range of 500 to 600 nm under excitation by light having a peak in the wavelength range of 250 to 500 nm. This phosphor is in the form of particles having a median size of 5 to 40 µm inclusive, shows a luminous efficiency of more than 70%, and has a composition represented by the following formula (1):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ ((Sr p M 1-p ) 1-x Ce x ) 2y Al z Si 10-z O u N w €ƒ€ƒ€ƒ€ƒ€ƒ(1).
In the formula, M is at least one of the alkaline earth metals, and p, x, y, z, u and w satisfy the conditions of
0‰¤p‰¤1,
0<x‰¤1,
0.8‰¤y‰¤1.1,
2‰¤z‰¤3.5,
0<u‰¤1,
1.5‰¤z-u, and
13‰¤u+w‰¤15, respectively.</p> |
