Abstract: A tanning device is described that includes semiconductor light-emitting diodes (LEDs) as a light source, which LEDs are preferably composed of (InGa)N, (AlGa)N, (AlInGa)N or (AlInGa)P as their semiconductor material.

Abstract: The invention relates to GLS-look-alike LED light source (100) comprising two different types of LEDs (21, 22), preferably LEDs emitting with a near UV spectrum and a blue or white spectrum, respectively. The light source (100) further preferably comprises a transparent bulb (40) with a shape similar to an incandescent lamp that is coated by a luminescent layer (30) to achieve a white lamp spectrum. The luminescent layer may contain one or two luminescent compositions.

Abstract: A low-pressure gas discharge lamp includes a gas discharge vessel having a gas filling with a discharge-maintaining composition. At least part of a wall of the discharge vessel is provided with a luminescent material including a first UV-B phosphor containing, in a host lattice, gadolinium(III) as an activator and praseodymium(III) as a sensitizer.

Abstract: A dielectric barrier Xe discharge lamp include discharge vessel with a gas filling containing Xe or a Xe/Ne mixture and a luminescent layer of a UV-B phosphor emitting in the UV-B range 280 to 320 nm. The luminescent layer includes a Gd3+ activated phosphor according to at least one the formulas of (Y1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)B3O6, (Y1-x-y-zGdxSyLuz)PO4, (Y1-x-y-zGdxSyLuz)BO3, (Y1-x-y-zGdxSyLuz)3Al5O12, Me(Y1-x-yGdxSy)F4 (Me=Li, Na, K; S?Bi, Nd, Pr; 0.0<x,z?1.0; 0.0<y?0.1) or a mixture thereof. The luminescent layer may be sensitized by Bi3+, Pr3+ or Nd3+.

Abstract: The invention relates to an illumination unit having an adjustable colour location consisting of a discharge lamp as primary light source and LEDs as secondary light source and additionally a phosphor layer in the form of a phosphor screen comprising conversion phosphors. Furthermore, the present invention relates to a method for lighting usable areas by the illumination unit according to the invention.

Abstract: The invention relates to photonic materials having regularly arranged cavities containing at least one colorant, where the wall material of the photonic material has dielectric properties and as such is essentially non-absorbent for the wavelength of an absorption band of the respective colorant and is essentially transparent for the wavelength of a colorant emission which can be stimulated by the absorption wavelength, and the cavities are shaped in such a way that radiation having the wavelength of the weak absorption band of the colorant is stored in the photonic material, to the use thereof as phosphor system in an illuminant, to corresponding illuminants and production processes.

Abstract: The invention relates to an illumination system with a material having a low or negative thermal expansion coefficient in order to compensate for the thermal expansion of the further materials present in the illumination system.

Abstract: The invention relates to phosphors having a garnet structure of the formula I (Ya,Gdb,Luc,Sed,Sme,Tbf,Prg,Thh,Iri,Sbj,Bik)3-x(All,Gam)5O12:Cex??(I) where a+b+c+d+e+f+g+h+i+j+k=1 l+m=1 and x=0.005 to 0.1, and to a process for the preparation of these phosphors, and to the use thereof as conversion phosphors for conversion of the blue or near-UV emission from an LED.

Abstract: The subject of the present invention relates to a high efficiently dielectric barrier discharge (DBD)-lamp for generating and/or emitting a radiation of ultraviolet (UV)-light comprising: a discharge gap (1) being at least partly formed and/or surrounded by at least an inner wall (2) and an at least partly transparent (3), each with an inner surface (2a, 3a), facing the discharge gap (1) and an outer surface (2b, 3b) arranged opposite of and directed away from the corresponding inner surface (2a, 3a), a filling located inside the discharge gap (1), at least two electrical contacting means (4), a first electrical contacting means (4a) at the inner wall (2) and a second electrical contacting means (4b) at the outer wall (3), and at least one luminescent coating layer (5) arranged at/on and at least partly covering at least a part of the respective wall's inner surface (3a), arranged such, that at least a part of the generated UV-light of a certain wavelength range can pass the luminescent coating layer (5) from

Abstract: The invention relates to a tri-color lamp for generating white light comprising a phosphor composition comprising a phosphor of general formula (Ba1-x-y-z-SrxCay)2SiO4:Euz, wherein 0?x?1, 0?y?1 and 0<z<1. The phosphor composition may also comprise a red phosphor. The two phosphors can absorb radiation emitted by a light emitting diode, particularly a blue LED. This arrangement provides a mixing of three light sources—light emitted from the two phosphors and unabsorbed light from the LED. The invention also relates to an alternative to a green LED comprising a single green phosphor of general formula (Ba1-x-y-z-SrxCay)2SiO4:Euz, wherein 0?x?0 1, 0?y?1 and 0<z<1, that absorbs radiation from a blue LED. A resulting device provides green light of high absorption efficiency and high luminous equivalent values.

Abstract: The invention relates to a phosphor element comprising Cr(III)-activated aluminium oxide (ruby), to the production thereof, and to the use thereof as LED conversion phosphor for white LEDs or so-called colour-on-demand applications.

Abstract: The invention relates to a tri-color lamp for generating white light comprising a phosphor composition comprising a phosphor of general formula (Ba1?x?y?z?SrxCay)2SiO4:Euz, wherein 0?x?1, 0?y?1 and 0<z<1. The phosphor composition may also comprise a red phosphor. The two phosphors can absorb radiation emitted by a light emitting diode, particularly a blue LED. This arrangement provides a mixing of three light sources—light emitted from the two phosphors and unabsorbed light from the LED. The invention also relates to an alternative to a green LED comprising a single green phosphor of general formula (Ba1?x?y?z ?SrxCay)2SiO4:Euz, wherein 0?x?1, 0?y?1 and 0<z<1, that absorbs radiation from a blue LED. A resulting device provides green light of high absorption efficiency and high luminous equivalent values.

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: This invention relates to a dielectric barrier Xe discharge lamp comprising an UV-B phosphor. The lamp consists of a gas-tight, discharge vessel with a gas filling containing Xe or a Xe/Ne mixture and is provided with a luminescent layer, which comprises at least one luminescent material emitting in the UV-B range (280 to 320 nm). The luminescent layer comprises a Gd3+ activated phosphor according to the formulas McPO4:Gd, Lal1—XAl3(BO3)4:Gdx, and La1—xB3O6:Gdx which is eventually sensitised by Bi3+, Pr3+ or Nd3+ The advantages of such an UV-B emitting discharge lamp over fluorescent lamps based on a Hg low-pressure discharge are a high power density, 10 instant light, long lifetime, a spectral power distribution which is only determined by the phosphor blend, and an arbitrary burner design.

Abstract: An illumination system, comprising a radiation source (1) and a luminescent material (3,4,5) 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 europium(II)-activated earth alkaline lithium orthosilicate of general formula (Sr1-x-y-zCaxBay)Li2SiO4:Euz wherein 0?x?1; 0?y?1; 0.001<z<0.3 can provide light sources having high luminosity and color-rendering index, especially in conjunction with a light emitting diode as a radiation source. The red to yellow-emitting europium(II)-activated earth alkaline lithium orthosilicate of general formula (Sr1-x-y-zCaxBay)Li2SiO4:Euz wherein 0<x?1; 0?y<1; 0.001<z<0.3 is efficiently excitable by primary radiation in the near UV-to-blue range of the electromagnetic spectrum.

Abstract: This invention relates to a light emitting device based on a Xe or Xe/Ne excimer discharge, e.g. a full colour display screen or a xenon excimer lamp, comprising a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UVlight emitting phosphor. Full colour plasma display panels (PDPs) according to the present invention comprising a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UV-light emitting phosphor for the red pixels show an improved colour point and a shorter decay time compared to the use of the respective single red emitting Eu(III) activated phosphor. Xenon excimer lamps for illumination purposes (e.g. for LCD backlighting or X-Ray image illumination) comprising a phosphor blend of a redemitting Eu(III) activated phosphor and an UV-light emitting phosphor show an improved colour rendering. The invention is also related to a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UV-light emitting phosphor.

Abstract: 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<x<1, 0<y<1, 0<z£0.1, 0<a£0.2 and 0<b£0.1. The invention also relates to with a green-emitting cerium-activated lutetium-aluminum-garnet of general formula (Lu1-x-y-a-bYxGdy)3(Al1-zGaz)5O12:CeaPrb wherein 0<x<1, 0<y<1, 0<z£0.1, 0<a£0.2 and 0<b£0.1.

Abstract: The invention relates to nanoparticles coated with an inorganic nanoscale material herein referred to as core-shell nanoparticle, in which the core material has a wider band gap than the shell material. The described core-shell nanoparticles are very suitable for the application in photodynamic therapy due to their enhanced energy transfer ability.

Abstract: The invention relates to a light emitting plate system (1), in which the plate (10) is equipped with at least one particle layer (40), the particle (50) of which have been designed to achieve an improved transparency and light extraction efficiency of the plate (10).

Abstract: The invention is concerned with a discharge lamp provided with a gas discharge vessel comprising a gas filling with a discharge-maintaining composition, at least part of a wall of the discharge vessel being provided with a luminescent material comprising as a first UV-phosphor a lanthanide-activated lanthanum magnesium aluminate of formula Lai_xMgAl?Oic>:Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001<x<0.5, which discharge lamp is further provided with means for generating and maintaining a gas discharge. If it comprises gadolinium as an activator, such a lamp is especially useful for narrow-band UV-B phototherapy. The invention is also concerned with an UV-phosphor in the form of a lanthanide-activated lanthanum magnesium aluminate of formula Lai_xMgAl?Oic>:Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001<x<0.5.