| 摘要 |
The invention relates to a white emitting light source with an improved luminescent material of the formula (AEN2/3)*b(MN)*c(SiN4/3)*d1CeO3/2*d2EuO*xSiO2*yAlO3/2 wherein AE is an alkaline earth metal chosen of the group of Ca, Mg, Sr and Ba or mixtures thereof and M is a trivalent element chosen of the group of Al, B, Ga, Sc with d1>10*d2. In combination with a UV to blue light generating device this material leads to an improved light quality and stability, especially an improved temperature stability for a wide range of applications. |
| 主权项 |
1. A device comprising:
a light source configured to emit light having a wavelength between 400 nm and 480 nm; and a luminescent material positioned to absorb light emitted by the light source, the luminescent material comprising (AEN2/3)*b(MN)*c(SiN4/3)*d1CeO3/2*d2EuO*xSiO2*yAlO3/2 wherein AE is an alkaline earth metal chosen of the group of Ca, Mg, Sr and Ba or mixtures thereof and M is a trivalent element chosen of the group of Al, B, Ga, Sc or mixtures thereof, wherein
0.95≦2*(a+d1+d2)/(b+c+x+y)≦1.2a+d1+d2≧c+x, (b+y):(c+x)≧1,(b+y)≦1+10*d1,b≧5*y, c≧10*x, 0.0001≦d1≦0.2 and d1≧10*d2. |
