| 摘要 |
Disclosed is an LED that has a low color temperature of up to 3500 K and comprises a blue-emitting LED as well as two luminous substances which are mounted upstream thereof. A first luminous substance belongs to the class of oxinitridosilicates, contains a cation M which is doped with divalent europium, and is of general formula M(1-c)Si2O2N2:Dc, wherein M = Sr or M = Sr(1-x-y)BayCax with the stipulation x+y < 0.5. The oxinitridosilicate entirely or mainly consists of the highly temperature-resistant HT modification. A second luminous substance of formula (Ca,Sr)2Si5N8:Eu belongs to the class of nitridosilicates. |
