Abstract: The invention provides a lighting device (100) comprising: —a first solid state light source (10), configured to provide UV radiation (11) having a wavelength selected from the range of 380-420 nm; —a second solid state light source (20), configured to provide blue light (21) having a wavelength selected from the range of 440-470 nm; —a wavelength converter element (200), wherein the wavelength converter element (200) comprises: —a first luminescent material (210), configured to provide upon excitation with the blue light (21) of the second solid state light source (20) first luminescent material light (211) having a wavelength selected from the green and yellow wavelength range, and wherein the first luminescent material excitability for UV radiation (11) is lower than for blue light (21); and —a second luminescent material (220), configured to provide upon excitation with the blue light (21) of the second solid state light source (20) second luminescent material light (221) having a wavelength selected from

Abstract: In a method according to embodiments of the invention, for a predetermined amount of light produced by a light emitting diode and converted by a phosphor layer comprising a host material and a dopant, and for a predetermined maximum reduction in efficiency of the phosphor at increasing excitation density, a maximum dopant concentration of the phosphor layer is selected.

Abstract: The invention provides a lighting device configured to provide red lighting device light, the lighting device comprising: (i) a first light source configured to provide first light source light having a peak wavelength (?ls); (ii) a first red luminescent material configured to absorb at least part of the first light source light and to convert into first red luminescent material light having a first red emission peak wavelength (?m1), the first red luminescent material having an excitation maximum (?x1); (iii) a second red luminescent material configured to absorb at least part of the first light source light and to convert into second red luminescent material light having a second red emission peak wavelength (?m2), the second red luminescent material having a second excitation maximum (?x2); and wherein the first luminescent material and the second luminescent material are Eu2+ based, and wherein ?m1<?m2, ?x1<?ls and ?x2>?ls.

Abstract: In embodiments of the invention, a light emitting device includes a semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region. A first wavelength converting layer is disposed in a path of light emitted by the light emitting layer. The first wavelength converting layer may be a wavelength converting ceramic. A second wavelength converting layer is fused to the first wavelength converting layer. The second wavelength converting layer may be a wavelength converting material disposed in glass.

Abstract: In a method according to embodiments of the invention, for a predetermined amount of light produced by a light emitting diode and converted by a phosphor layer comprising a host material and a dopant, and for a predetermined maximum reduction in efficiency of the phosphor at increasing excitation density, a maximum dopant concentration of the phosphor layer is selected.

Abstract: The invention provides a lighting device configured to provide white lighting device light, the lighting device comprising (i) a light source, configured to provide blue light source light, and (ii) a luminescent material element, configured to absorb at least part of the blue light source light and to convert into luminescent material light, wherein the luminescent material element comprises a luminescent material which consists for at least 80 wt. % of a M2-2xEu2xSi5-yAlyOyN8-y phosphor, wherein M comprises one or more of Mg, Ca, Sr, Ba, with a molar ratio of (Mg+Ca+Sr)/(Ba)?0.1, wherein x is in the range of 0.001-0.02, wherein y is in the range of ?0.2, and wherein the white lighting device light comprises said blue light source light and said luminescent material light.

Abstract: The invention provides a lighting device configured to provide red lighting device light, the lighting device comprising: (i) a first light source configured to provide first light source light having a peak wavelength (?ls); (ii) a first red luminescent material configured to absorb at least part of the first light source light and to convert into first red luminescent material light having a first red emission peak wavelength (?m1), the first red luminescent material having an excitation maximum (?x1); (iii) a second red luminescent material configured to absorb at least part of the first light source light and to convert into second red luminescent material light having a second red emission peak wavelength (?m2), the second red luminescent material having a second excitation maximum (?x2); and wherein the first luminescent material and the second luminescent material are Eu2+ based, and wherein ?m1<?m2, ?x1<?ls and ?x2>?ls.

Abstract: The invention provides, amongst others for application in a lighting unit, a phosphor selected from the class of M2D2C2-2bBbA2N6:Ln ??(I) with M=selected from the group consisting of divalent Ca, Sr, and Ba; D=selected from the group consisting of monovalent Li, divalent Mg, Mn, Zn, Cd, and trivalent Al and Ga; C=selected from the group consisting of monovalent Li and Cu; B=selected from the group consisting of divalent Mg, Zn, Mn and Cd; A=selected from the group consisting of tetravalent Si, Ge, Ti, and Hf; Ln=selected from the group consisting of ES and RE; ES=selected from the group consisting of divalent Eu, Sm and Yb; RE=selected from the group consisting of trivalent Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm; and 0?b?1.

Abstract: The invention provides a lighting device (100) comprising: a first solid state light source (10), configured to provide UV radiation (11) having a wavelength selected from the range of 380-420 nm; a second solid state light source (20), configured to provide blue light (21) having a wavelength selected from the range of 440-470 nm; a wavelength converter element (200), wherein the wavelength converter element (200) comprises: a first luminescent material (210), configured to provide upon excitation with the blue light (21) of the second solid state light source (20) first luminescent material light (211) having a wavelength selected from the green and yellow wavelength range, and wherein the first luminescent material excitability for UV radiation (11) is lower than for blue light (21); and a second luminescent material (220), configured to provide upon excitation with the blue light (21) of the second solid state light source (20) second luminescent material light (221) having a wavelength selected from the

Abstract: In embodiments of the invention, a light emitting device includes a semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region. A first wavelength converting layer is disposed in a path of light emitted by the light emitting layer. The first wavelength converting layer may be a wavelength converting ceramic. A second wavelength converting layer is fused to the first wavelength converting layer. The second wavelength converting layer may be a wavelength converting material disposed in glass.

Abstract: The invention provides a lighting unit comprising a source of blue light, a source of green light, a first source of red light comprising a first red luminescent material, configured to provide red light with a broad band spectral light distribution, and a second source of red light comprising a second red luminescent material, configured to provide red light with a spectral light distribution comprising one or more red emission lines. Especially, the first red luminescent material comprises (Mg,Ca,Sr)AlSiN3:Eu and/or (Ba,Sr,Ca)2Si5-xAlxOxN8-x:Eu, and the second red luminescent material comprises K2SiF6:Mn.

Abstract: The invention provides a lighting unit comprising a light source, configured to generate light source light and a particulate luminescent material, configured to convert at least part of the light source light into luminescent material light, wherein the light source comprises a light emitting diode (LED), wherein the particulate luminescent material comprises particles comprising cores, said cores comprising a phosphor comprising M?xM2-2xAX6 doped with tetravalent manganese, wherein M? comprises an alkaline earth cation, M comprises an alkaline cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, at least comprising silicon, wherein X comprises a monovalent anion, at least comprising fluorine, and wherein the particles further comprise a metal phosphate based coating, wherein the metal of the metal phosphate based coating is selected from the group consisting of Ti, Si and Al.

Abstract: The invention provides a lighting unit comprising a source of blue light, a source of green light, a first source of red light comprising a first red luminescent material, configured to provide red light with a broad band spectral light distribution, and a second source of red light comprising a second red luminescent material, configured to provide red light with a spectral light distribution comprising one or more red emission lines. Especially, the first red luminescent material comprises (Mg,Ca,Sr)AlSiN3:Eu and/or (Ba,Sr,Ca)2Si5-xAlxOxN8-x:Eu, and the second red luminescent material comprises K2SiF6:Mn.

Abstract: The invention provides a lighting unit (100) comprising a light source (10), configured to generate light source light (11) and a luminescent material (20), configured to convert at least part of the light source light (11) into luminescent material light (51), wherein the luminescent material (20) comprises a phosphor (40), wherein this phosphor comprises an alkaline earth aluminum nitride based material having a cubic crystal structure with T5 supertetrahedra, wherein the T5 supertetrahedra comprise at least Al and N, and wherein the alkaline earth aluminum nitride based material further comprises a luminescent lanthanide incorporated therein.

Abstract: The invention provides, amongst others for application in a lighting unit, a phosphor having the formula M1?x?y?zZzAaBbCcDdEeN4?nOn:ESxREy (I), with M=selected from the group consisting of Ca, Sr, and Ba; Z=selected from the group consisting of monovalent Na, K, and Rb; A=selected from the group consisting of divalent Mg, Mn, Zn, and Cd; B=selected from the group consisting of trivalent B, Al and Ga; C=selected from the group consisting of tetravalent Si, Ge, Ti, and Hf; D=selected from the group consisting of monovalent Li, and Cu; E=selected for the group consisting of P, V, Nb, and Ta; ES=selected from the group consisting of divalent Eu, Sm and Yb; RE=selected from the group consisting of trivalent Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm; 0?x?0.2; 0?y?0.2; 0<x+y?0.4; 0?z<1; 0?n?0.5; 0?a?4 (such as 2?a?3); 0?b?4; 0?c?4; 0?d?4; 0?e?4; a+b+c+d+e=4; and 2a+3b+4c+d+5e=10?y?n+z.

Abstract: The invention provides a lighting unit comprising a light source, configured to generate light source light and a luminescent material, configured to convert at least part of the light source light into luminescent material light, wherein the light source comprises a light emitting diode (LED) and wherein the luminescent material comprises a phosphor comprising M2AX6 doped with tetravalent manganese, wherein M comprises monovalent cations, at least comprising potassium and rubidium, wherein A comprises a tetravalent cation, at least comprising silicon, wherein X comprises a monovalent anion, at least comprising fluorine, and wherein M2AX6 has the hexagonal phase.

Abstract: The invention provides, amongst others for application in a lighting unit, a phosphor having the formula M1?y?zZzAaBbCcDdEeN6?nOn:ESx,REy (I), with M=selected from the group consisting of divalent Ca, Sr, and Ba; Z=selected from the group consisting of monovalent Na, K, and Rb; B=selected from the group consisting of divalent Mg, Mn, Zn, and Cd; C=selected from the group consisting of trivalent B, Al and Ga; D=selected from the group consisting of tetravalent Si, Ge, Ti, and Hf; A=selected from the group consisting of monovalent Li, and Cu; E=selected for the group consisting of P, V, Nb, and Ta; ES=selected from the group consisting of divalent Eu, Sm and Yb; RE=selected from the group consisting of trivalent Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm; 0?x?0.2; 0?y?0.2; 0<x+y?0.4; 0?z<1;x+y+z<1; 0?n?0.75; 0?a?2 (such as 0?b?0.5); 0?b?2; 0?c?4; 0?d?4; 0?e?4; a+b=2; c+d+e=4; and a+2b+3c+4d+e+y?z=16?n.

Abstract: The invention provides a lighting unit comprising a light source, configured to generate light source light and a luminescent material, configured to convert at least part of the light source light into luminescent material light, wherein the light source comprises a light emitting diode (LED) and wherein the luminescent material comprises a phosphor comprising M2AX6 doped with tetravalent manganese, wherein M comprises monovalent cations, at least comprising potassium and rubidium, wherein A comprises a tetravalent cation, at least comprising silicon, wherein X comprises a monovalent anion, at least comprising fluorine, and wherein M2AX6 has the hexagonal phase.

Abstract: In embodiments of the invention, a light emitting device includes a semiconductor structure including a light emitting layer disposed between an n-type region and a p-type region. A first wavelength converting layer is disposed in a path of light emitted by the light emitting layer. The first wavelength converting layer may be a wavelength converting ceramic. A second wavelength converting layer is fused to the first wavelength converting layer. The second wavelength converting layer may be a wavelength converting material disposed in glass.

Abstract: The invention relates to a novel red emitting material of (Ba1—x—y—zSrxCayEuz)2Si5—a?bAlaN8?a?4bOa+4b having an average particle size distribution d50 of >6 ?m, with 0.3?x?0.9, 0.01?y?0.1, 0.005?z?0.04, 0?a?0.2 and 0?b?0.2.