| 摘要 |
<p>The invention is directed to a light emitting comprising a blue emitting LED, a first phosphor layer exited at the emitting wavelength of the LED, which phosphor has an emission wavelength within a range of between 500 nm and 560 nm, and a second phosphor layer having a color point u′in the range between 0.24 and 0.35 and a peak emission of the phosphor layer ofλp>600 nm of the emission spectra, especially a pcLED comprising a combination of a green emitting luminescent ceramic material and a second phosphor material having a broad emission spectra. The second phosphor material can comprise a compound of the general formula M1-x-y-zSi1+zAl1−zN3−zOz:Eu2+xCe2+y, whereby M is selected from the group consisting of Ca, Sr or mixtures thereof and 0.0001≰x≰0.005; 0.001≰y≰0.05 and 0≰z≰0.25.</p> |
