摘要:
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
摘要:
The invention relates to an improved red light emitting material of the formula M 1-y A 1+x Si 4-x N 7-x-2y O x+2y :REwhereby 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 and x is ≥0 and ≤1 and y is ≥0 and ≤0.2. This material is believed to crystallize in a novel structure type that comprises two individual lattice sites for rare 10 earth metal incorporation, which leads to an improved lighting behaviour.
摘要:
The invention concerns an illumination system for generation of colored, especially amber or red light, 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 amber to red emitting a rare earth metal-activated oxonitridoalumosilicate of general formula (Ca 1-x-y- zSrxBa y Mg z ) 1-n (Al 1-a+b B a )Si 1-b N 3-b O b : Re n , wherein 0 = x = l, 0 = y = l, 0 = z = l, 0 = a = l , 0
摘要:
The invention is concerned with a low-pressure mercury vapor discharge lamp comprising a light-transmitting discharge vessel, said discharge vessel enclosing, in a gastight manner, a discharge space provided with a filling of mercury, at least a part of wall of the discharge vessel being provided with a luminescent composition comprising a first UV-A phosphor of the general formula (Gdl-x-y-zYxLuy)P04:Cez, wherein 0 ≤ x
摘要:
The invention concerns an illumination system for generation of colored, especially amber or red light, 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 amber to red emitting a rare earth metal-activated oxonitridoalumosilicate of general formula (Ca1-x-y-zSrxBayMgz)1-n(Al1-a+bBa)Si1-bN3-bOb: Ren, wherein 0 ≤ x ≤ l, 0 ≤ y ≤ l, 0 ≤ z ≤ l, 0 ≤ a ≤ l , 0
摘要:
The invention relates to an illumination system comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing a portion 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 green-emitting cerium-activated lutetium-aluminum-garnet of general formula (Lu1-x-y-a-bYxGdy)3(Al1-zGaz)5O12:CeaPrb wherein 0
摘要:
The invention relates to a method of coating a luminescent material with a layer of a metalpolyphosphate wherein the metal is chosen from the group formed by Ca, Sr and Ba. According to the invention, the luminescent material is dispersed in a watery solution of sodium polyphosphate, a watery solution of nitrate of the metal M is added, after which the luminescent material is separated, dried and fired.
摘要:
The invention relates to a red emitting material of the composition a (MIIN2/3)*b (MIIIN)*c (MIVN4/3) *d1 CeO3/2*d2 EuO *x MIVO2 *y MIIIO3/2 with Cerium and Europium present in the material. This material has been found to have an increased lumen equivalent and absorption efficiency of blue light.