Abstract: The invention concerns an 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 yellow to red-emitting europium(II) activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3X+4/3y:EuzOaXb, wherein 1?x?2; 3?y?7; 0.001?z?0.09, 0.005<a?5 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. The invention is also concerned with a red to yellow-emitting europium(II)-activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3x+4/3y:EuzOaXb, wherein 1?x?2; 3?y??7; 0.001<z?0.09, 0.005<a?0.05, 0.01<b?0.

Abstract: An illumination system includes a radiation source and a fluorescent material including at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light. The phosphor includes a yellow red-emitting cerium-activated carbido-nitridosilicate of general formula (RE1?z)2?aEAaSi4N6+aC1?a:Cez where 0?a<1, 0<z?0.2, EA is at least one earth alkaline metal selected from the group of calcium, strontium and barium, and RE is a least one rare earth metal chosen from the group of yttrium, gadolinium and lutetium. The phosphor may include a red to yellow-emitting cerium-activated carbido-nitridosilicate of general formula (RE1?z)2?aEAa Si4N6+aC1?a:Cez where 0?a<1, 0<z?0.2, EA is at least one earth alkaline metal selected from the group of calcium, strontium and barium, and RE is a least one rare earth metal chosen from the group of yttrium, gadolinium and lutetium.

Abstract: The invention concerns an 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 yellow to red-emitting europium(II) activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3X+4/3y:EuzOaXb, wherein 1?x?2; 3?y?7; 0.001?z?0.09, 0.005<a?5 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. The invention is also concerned with a red to yellow-emitting europium(II)-activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3x+4/3y:EuzOaXb, wherein 1?x?2; 3?y??7; 0.001<z?0.09, 0.005<a?0.05, 0.01<b?0.

Abstract: The invention concerns an illumination system, comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is a yellow red-emitting cerium-activated carbido-nitridosilicate of general formula (RE1?z)2?aEAaSi4N6+aC1?a:CeZ, wherein 0?a<1, 0<z?0.2, EA is at least one earth alkaline metal selected from the group of calcium, strontium and barium, and RE is a least one rare earth metal chosen from the group of yttrium, gadolinium and lutetium. The invention is also concerned with a red to yellow-emitting cerium 10 activated carbido-nitridosilicate of general formula (RE1?z)2?aEAaSi4N6+aC1?a:Cez wherein 0?a<1, 0<z?0.

Abstract: The invention concerns a light emitting device comprising a light emitting structure capable of emitting primary light of a wavelength less then 480 nm and a luminescent screen comprising a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002?a?0.2, 0.0?b?0.25, 0.0?c?0.25, 0.0?d?0.25, 0.0?e?0.25, 1.5?x?2.5, 1.5?y?2.5 and 1.5?z?2.5. The invention also concerns a luminescent screen comprising a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002?a?0.2, 0.0?b?0.25, 0.0?c?0.25, 0.0?d?0.25, 0.0?e?0.25, 1.5?x?2.5, 1.5?y?2.5 and 1.5?z?2.5. The invention also concerns a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002?a?0.2, 0.0?b?0.25, 0.0?c?0.25, 0.0?d?0.25, 0.0?e?0.25, 1.5?x?2.5, 1.5?y?2.5 and 1.5 <z<2.5.

Abstract: The invention concerns a light emitting device comprising a light emitting structure capable of emitting primary light of a wavelength less then 480 nm and a luminescent screen comprising a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002?a?0.2, 0.0?b?0.25, 0.0?c?0.25, 0.0?d?0.25, 0.0?e?0.25, 1.5?x?2.5, 1.5?y?2.5 and 1.5?z?2.5. The invention also concerns a luminescent screen comprising a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002?a?0.2, 0.0?b?0.25, 0.0?c?0.25, 0.0?d?0.25, 0.0?e?0.25, 1.5?x?2.5, 1.5?y?2.5 and 1.5?z?2.5. The invention also concerns a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002?a?0.2, 0.0?b?0.25, 0.0?c?0.25, 0.0?d?0.25, 0.0?e?0.25, 1.5?x?2.5, 1.5?y?2.5 and 1.5<z<2.5.