Abstract: The invention relates to a discharge lamp with a novel garnet-type Pr or Tm doped phosphor with excellent UV-A and UV-B spectral properties.

Abstract: The invention relates to phosphors having a garnet structure of the formula I (Ya,Lub,Sec,Tbd,The,Irf,Sbg)3?x (Al5?yMgy/2Siy/2)O12:Cex (I), where a+b+c+d+e+f+g+h+i=1 x=0.005 to 0.1 and y=0 to 4.0, and to a process for the preparation of these phosphors and to the use as conversion phosphors for conversion of the blue or near-UV emission from an LED.

Abstract: The invention relates to compounds of the formula (I), A2-0.5y-?EuxSi5N8-yOy (I), where A stands for one or more elements selected from Ca, Sr, Ba, and x stands for a value from the range 0.005 to 1, and y stands for a value from the range 0.01 to 3, to mixtures thereof, to a process for the preparation of these phosphors and mixtures, and to the use thereof as conversion phosphors.

Abstract: The invention relates to phosphors of the formula (I) (Ln1-a-bGdaSmb)wMgxSry(Al1-cBc)zO(3/2w+x+y+3/2z) (I) where Ln=Y, La and/or Lu a, c=0.0 to 1.0 0<b <0.2 and a+b<1.0 w=1.0 to 3.0 x, y=1.0 to 2.0 and z>0.0 to 12.0, and to a process for the preparation of these phosphors and to the use thereof as conversion phosphors for conversion of the near-UV emission from an LED.

Abstract: The invention relates to an illumination unit having an adjustable color 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 compounds of the formula (I) (Ca,Sr,Ba)6-X(Si1-y Mey)3(O1-zMa2z)6N4:Eux (I), where Me=Th, Ru and/or Os Ma?F and/or Cl, x<0.5, y<1 and z<0.1, and to a process for the preparation of these compounds and use as phosphors and conversion phosphors for the conversion of the blue or near-UV emission from an LED.

Abstract: A UVB phosphor of the composition (Laj_,,—y—,Gd,,Yy)PO4:Ce, is described, in which x=0 to 0.5, y=0 to 0.5 and z=0.01 to 0.3 and the sum of x, y and z is less than 1. From a phosphor of this kind, a phosphor layer can be produced that, in fluorescent lamps based on low-pressure mercury discharge lamps, produces a spectrum of 5 UV light that is particularly well suited to the cosmetic or medical treatment of the skin.

Abstract: A system comprising a device for placement in front of a display device, such as a TV screen, to change the optical properties of light received by a user observing said display device, when the display device is in an off state or standby state, while when the display device is in an on state, the device appears transparent.

Abstract: The present invention provides a method of monitoring performance of a discharge lamp. The discharge lamp includes electrodes and a discharge vessel filled with gas and equipped with a luminescent layer, wherein the gas is intended to emit a first ultraviolet light in a first spectral range when the gas is excited by an electric field produced by the electrodes, and at least part of the first ultraviolet light is intended to be changed into a second ultraviolet light in a second spectral range of longer wavelength than the first spectral range by the luminescent layer. The method comprises the steps of finding the value of a first intensity of the first ultraviolet light; finding the value of a second intensity of the second ultraviolet light; and determining the conversion efficiency of the luminescent layer for converting the first ultraviolet light into the second ultraviolet light on the basis of the ratio of the value of the second intensity to the value of the first intensity.

Abstract: The invention relates to a light emitting device (1) with high colour rendering comprising a wavelength converting member (2) with a luminescent medium for wavelength conversion of blue light and/or ultraviolet light (10) into red light and/or yellow and/or green light and a light source (3) emitting blue light (10) and/or ultraviolet light arranged to pump the luminescent medium, said luminescent medium essentially having a main phase of a solid state host material which is doped with Ce3+-ions. According to the invention the host material comprises ions of a further rare-earth material Ln, wherein the host material is selected such that the emission energy of the 5d-4f emission on Ce3+-ions is energetically higher than the absorption energy into an upper 4fn state of the further rare-earth material Ln, and wherein the light emission of wavelength converted light is caused by an intra-atomic 4fn-4fn transition within the ions of the further rare-earth material.

Abstract: The invention relates to illumination devices (1) with a light source (2) and an afterglow surface (4) comprising a phosphor. The phosphor has an afterglow emission peak at a temperature above about 100° C. and/or has the formula (Sr1-zMz)4Al14O25:Eu, Ln, Xk with M ? {Ca, Ba, Mg}, Ln ? {Dy, Nd}, X ? {Yb, Tm, Sm}.

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 invention relates to compounds of the formula (I) Ma2-y(Ca,Sr,Ba)1-x-ySi5-zMezN8:EuxCey (I), where Ma=Li, Na and/or K Me=Hf4+ and/or Zr4+ x=0.0015 to 0.20 and y=0 to 0.15 z<4, and to a process for the preparation of these compounds and to the use as phosphors and conversion phosphors for conversion of the blue or near-UV emission from an LED.

Abstract: The invention relates to a UV-B emitting discharge lamp comprising Pr(III) as an activator.

Abstract: The invention relates to a liquid-crystal display fitted with a backlighting system having a white light source which comprises a semiconductor diode and a phosphor layer comprising a combination of at least two phosphors, where at least one phosphor emits red light and at least one phosphor emits green light, and to a process for the production thereof.

Abstract: The invention relates to phosphors having a garnet structure of the formula I (Ya,Lub,Sec,Tbd,The,Irf,Sbg)3?x (Al5?yMgy/2Siy/2)O12:Cex (I), where +b+c+d+e+f+g+h+i=1×=0.005 to 0.1 and y=0 to 4.0, and to a process for the preparation of these phosphors and to the use as conversion phosphors for conversion of the blue or near-UV emission from an LED.

Abstract: The invention relates to compounds of the formula (I): (Ca,Sr,Ba)1-x-yMeySiN2:Eux, where Me?Mn2+, Mg2+, Be2+, Ni2+, Co2+ and/or Ru2+; x=0.005 to 0.20; and y<1, and/or of the formula (II): (Ca,Sr,Ba)2-xSi1-zMazN2:Eux, where Ma?Hf4+, Th4+ and/or Zr4+; x=0.005 to 0.

Abstract: An organic light emitting diode comprising a first electrode layer, a second electrode layer, a stack of functional layers, including an organic light-emitting layer, sandwiched between said first electrode layer and said second electrode layer, and an passivation layer arranged adjacent to said first electrode layer is disclosed. The passivation layer reacts with the first electrode layer to form an oxide at a reaction temperature that is induced by an evolving short circuit between the first electrode layer and the second electrode layer. The passivation layer is unreactive at temperatures lower than the reaction temperature.

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: A tungstate-based scintillating material and a method for using a tungstate-based scintillating material is provided. In addition, a radiation detector and an imaging device incorporating a tungstate-based scintillating material are provided.