| 摘要 |
The embodiment of the present disclosure provides yellow luminescent substance having high luminous efficiency. This fluorescent substance is represented by the formula (1):;(M1-xREx)2yAlzSi10-zOuNwCla (1)(in the formula, M is at least one element selected from the group consistingof Ba, Sr, Ca, Mg, Li, Na and K), and it emits luminescence with a peak within 500 to 600 nm when excited by light of 250 to 500 nm. |
| 主权项 |
1. A fluorescent substance represented by the following formula (1):
(M1-xREx)2yAlzSi10-zOuNwCla (1) in which
M is at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Li, Na and K;RE is an element selected from the group consisting of Ce, Tb, Eu and Mn; andx, y, z, u, w and a are numbers satisfying the conditions of 0<x≦1, 0.8≦y≦1.1, 2≦z≦3.5, 0<u≦1, 1.8≦z−u, 13≦u+w≦15, and 0<a≦0.0017, respectively wherein said fluorexcent substance emits luminescence with a peak in the wavelength range of 500 to 600 nm under excitation by light in the wavelength range of 250 to 500 nm. |
