Patent ID: 7700002
Filing Date: 2010-04-20
Classification: C09K

Abstract:
1. Illumination system comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing part of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light, wherein said at least one phosphor is a europium(II)-activated halogeno-oxonitridosilicate of the general formula Ea X Si y N 2/3x+4/3y :Eu z O a X b , wherein 1≦x≦2; 3≦y≦7; 0.001<z≦0.09, 0.005<a≦0.05, 0.01<b≦0.3, EA is at least one earth alkaline metal chosen from the group of calcium, barium and strontium and X is at least one halogen chosen from the group of fluorine, chlorine, bromine and iodine.