| 摘要 |
The invention provides a lighting device (100) configured to provide white lighting device light (101), the lighting device comprising (i) a light source (10), configured to provide blue light source light (11), and (ii) a luminescent material element (20), configured to absorb at least part of the blue light source light (11) and to convert into luminescent material light (21), wherein the luminescent material element (20) comprises a luminescent material (30) which consists for at least 80 wt.% of a M2-2xEu2xSi5-yAlyOyN8-y phosphor (130), wherein M comprises one or more of Mg, Ca, Sr, Ba, with a molar ratio of (Mg+Ca+Sr)/(Ba) ≤ 0.1, wherein x is in the range of 0.001-0.02, wherein y is in the range of ≤ 0.2, and wherein the white lighting device (101) light comprises said blue light source light (11) and said luminescent material light (21). |
