Abstract: The invention is concerned with 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 an oxido-nitrido-silicate of general formula EA2-zSi5-aBaN8-aOa:Lnz, wherein 0<z?1 and 0<a<5; comprising at least one element EA selected from the group consisting of Mg, Ca, Sr, Ba and Zn and at least one element B selected from the group consisting of Al, Ga and In, and being activated by a lanthanide selected from the group consisting of cerium, europium, terbium, praseodymium and mixtures thereof.

Abstract: The invention relates to a device for generating images and/or projections, which device includes a device for the detection of input radiation. The device for the detection of input radiation comprises a sensor with a Pr3+-activated scintillator for converting the input radiation into UV radiation. The Pr3+-activated scintillators have short excitation and decay times.

Abstract: The invention relates to a luminescent material comprising a luminescent particle (20) for generating light (4), wherein the luminescent particle (20) has a structured particle surface for effectively outcoupling the light (4) generated within the luminescent particle (20). Furthermore, the invention relates to a light source comprising a luminescent material according to the invention and a device for exciting the luminescent material.

Abstract: The invention relates to a process for the incorporation of nanophosphors (phosphors) into micro-optical structures, and to corresponding illuminants. In this impregnation process, a micro-optical system comprising inverse opal powders is filled with a dispersion of a nanophosphor.

Abstract: A phosphor converted light emitting device includes a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the light emitting layer being configured to emit light having a first peak wavelength; a first phosphor configured to emit light having a second peak wavelength; and a second phosphor configured to emit light having a third peak wavelength. The second phosphor is an Eu3+-activated phosphor, configured such that in the excitation spectrum at 298K and 1.013 bar, a maximum intensity in a wavelength range between 460 nm and 470 nm is at least 5% of a maximum intensity in a wavelength range between 220 nm to 320 nm.

Abstract: The subject of the present invention is a system incorporating a DBD lamp (1), a dielectric barrier discharge (DBD-) lamp (1), and a phosphor coating (2) for use as luminescent coating in a dielectric barrier discharge (DBD-) lamp (1), especially in a mercury-free DBD-lamp, comprising several phosphor grains (3a) together forming a luminescent coating layer (3) for converting a primary discharge radiation into a wanted radiation, whereby the phosphor coating (2) comprises a protective coating layer (4) at least partly surrounding the luminescent coating layer (3) for minimizing degradation of the luminescent coating layer (3) during use in a DBD-lamp (1).

Abstract: The invention relates to a plasma display screen comprising a carrier plate, a transparent front plate, a ribbed structure which divides the space between the carrier plate and the front plate into plasma cells that are filled with a gas, one or more electrode arrays to generate corona discharges in the plasma cells, and a phosphor layer which comprises a phosphor selected from the group composed of doped terbium(III)-activated phosphors of the general formula (In1-x-y-zGdyYz)BO3:Tbx, where 0<x?0.5 and 0<y?0.5, 0?z?0.5 and 1-x-y-z>0. The invention also relates to a phosphor selected from the group composed of doped terbium(III)-activated phosphors of the general formula (In1-x-y-zGdyYz)BO3:Tbx, where 0<x?0.5 and 0<y?0.5, 0?z?0.5 and 1-x-y-z>0.

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) fro

Abstract: A phosphor converted light emitting device includes a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the light emitting layer being configured to emit light having a first peak wavelength; a first phosphor configured to emit light having a second peak wavelength; and a second phosphor configured to emit light having a third peak wavelength. The second phosphor is an Eu3+-activated phosphor, configured such that in the excitation spectrum at 298K and 1.013 bar, a maximum intensity in a wavelength range between 460 nm and 470 nm is at least 5% of a maximum intensity in a wavelength range between 220 nm to 320 nm.

Abstract: A device for generating ultraviolet radiation by an excimer discharge is equipped with an at least partly UV-transparent discharge vessel whose discharge space is filled with a gas filling. The device includes electrodes for triggering and maintaining the excimer discharge in the discharge space. The device further has a coating that contains a phosphor including a host lattice and neodymium(III) as an activator.

Abstract: An EL structure is described, with a single ultraviolet or blue light emitting layer that is connected to a back electrode. The top surface comprises three separate segments for the primary colors red, green and blue. Another single phosphorescent blend or a two-component phosphorescent blend is deposited on at least two of the three segments. Each of the three segments can be individually driven by a corresponding top electrode. Thus, a single chip solution is provided for a LED with tunable visible light.

Abstract: A tanning device is described by which the bluish light emitted by mercury vapor lamps is converted into yellow or white light. For this purpose, the mercury lamps, or the sheets of transparent plastics material covering these lamps, are doped or coated with one or more organic or inorganic fluorescent dyes that partially absorb the blue light emitted by the mercury lamps and convert it into light of wavelengths of 550 to 650 nm.

Abstract: The invention relates to a low-pressure gas discharge lamp provided with a gas discharge vessel comprising a gas filling with a discharge-maintaining composition, wherein at least part of a wall of the discharge vessel is provided with a luminescent material comprising a first UV-B phosphor containing, in a host lattice, gadolinium(III) as an activator and praseodymium(III) as a sensitizer, which lowpressure gas discharge lamp is further provided with means for generating and maintaining a low-pressure gas discharge Such a lamp is particularly useful for narrow-band UV-B phototherapy. The invention also relates to a UV-B phosphor containing, in a host lattice, gadolinium(III) as an activator and praseodymium(III) as a sensitizer.

Abstract: A low-pressure vapor discharge lamp has a radiation-transmitting discharge vessel (1) enclosing, in a gastight manner, a discharge space (3) provided with a gas filling. The gas filling is substantially free of mercury and comprises an indium compound and a buffer gas. The discharge vessel (1) comprises discharge means (2) for maintaining a gas discharge in the discharge space (3). The discharge vessel (1) is provided with a luminescent layer (4). The luminescent layer (4) comprises a luminescent material based on a nitridosilicate or on an oxonitridosilicate. Preferably, the luminescent material comprises rare-earth emitters. Preferably, the luminescent material comprises europium, cerium, or ytterbium emitters.

Abstract: An ultraviolet reflecting layer and a fluorescent lamp is described, comprising an envelope having an inner surface, means within the lamp envelope for generating ultraviolet radiation, a light emitting layer of a luminescent material for generating visible light when impinged by ultraviolet radiation, and said ultraviolet reflecting layer, located between the light emitting layer and the inner surface of the lamp envelope, wherein the ultraviolet reflecting layer comprises a metal phosphate and/or a metal borate, with the metal being selected from Sc, Y, La, Gd, Lu and Al, or combinations thereof. The phosphates or borates used in the ultraviolet reflecting layer may optionally be doped by a Tb3+ and/or Dy3+ activator, to further improve the quantum yield of the conversion of UV radiation into visible light.

Abstract: The invention describes a light-emitting device (1) which comprises a light-emitting diode and a phosphor layer. To prolong the useful life of the light-emitting device (1), a phosphor (4) in the phosphor layer (2) has a water-resistant coating.

Abstract: A method of joining an electrode of a spark plug with a noble metal is described, the noble metal being joined locally with the electrode using a thermal input produced by a continuously operating laser beam.

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: A color-mixing lighting system has a light-emitting diode (6, 7) emitting first visible light having a first peak wave-length in a first spectral range and has a fluorescent material (8) converting a portion of the first visible light into second visible light having a second peak wavelength in a second spectral range. The second visible light has a full width at half maximum (FWHM) of at least 50 nm. Preferably, the second visible light is red light, the second peak wavelength being in the range from 590 to 630 ran, preferably, in the range from 600 to 615 nm. Preferably, the lighting system comprises a further light-emitting diode (7) for emitting third visible light having a third peak wavelength in a third spectral range. The color-mixing lighting system according to the invention generates white light with a high color-rendering index and allows certain variations in the wavelength of the primaries.

Abstract: A gas discharge lamp has a gas discharge vessel filled with a gas filling suitable for a gas discharge which emits VUV radiation, with a phosphor coating containing a downconversion phosphor. The downconversion phosphor has, in a host lattice, a pair of activators of a first lanthanoid ion and a second lanthanoid ion; a sensitizer selected from the group formed by the thallium(I) ion, lead(II) ion and bismuth(III) ion; and samarium(II) ion co-activator.