Patent ID: 8153025
Filing Date: 2012-04-10
Classification: C04B,C09K,H01L

Abstract:
1. Light emitting device, comprising a LED comprising at least one material of the formula M 1−y A 1+x Si 4−x N 7−x−2y O x+2y :RE, whereby: M is selected out of the group comprising Ba, Sr, Ca, Mg or mixtures thereof; A is selected out of the group comprising Al, Ga, B or mixtures thereof; RE is selected out of the group comprising rare earth metals, Y, La, Sc or mixtures thereof; x is ≧0 and ≦1 and y is ≧0 and ≦0.2; and the RE doping level is ≧0.05% and ≦10%; wherein the LED emits blue light and the material emits red light, the device further comprising a phosphor that emits yellow light.