Abstract: A high-energy LED is provided, in particular based on the n-polar technique, comprising a Eu3+ activated converter material based on tungsten/molybdenum oxide. Surprisingly, these materials do not show any saturation.

Abstract: A high-energy LED is provided, in particular based on the n-polar technique, comprising a Eu3+ activated converter material based on tungsten/molybdenum oxide. Surprisingly, these materials do not show any saturation.

Abstract: The present invention relates to a composite ceramic which comprises a conversion phosphor and a further material, characterized in that the further material has a negative coefficient of thermal expansion, and to a process for the preparation thereof. Furthermore, the present invention also relates to the use of the composite ceramic according to the invention as emission-converting material, preferably in a white light source, and to a light source, a lighting unit and a display device.

Abstract: The present invention relates to a composite ceramic which comprises a conversion phosphor and a further material, characterised in that the further material has a negative coefficient of thermal expansion, and to a process for the preparation thereof. Furthermore, the present invention also relates to the use of the composite ceramic according to the invention as emission-converting material, preferably in a white light source, and to a light source, a lighting unit and a display device.

Abstract: The invention provides a wavelength converting material comprising a compound of the formula (Y1-w-x-y-zScwLaxGdyLuz)2-a(S04)3:Mea, wherein Me represents trivalent cation or a mixture of trivalent cations capable of emitting UV-C radiation, and wherein each of w, x, y and z is in the range of from 0.0 to 1.0 and w+x+y+z?1.0, and wherein 0.0005?a?0.2. The wavelength converting material may be applied in an illumination device for UV illumination, in particular for sterilization or disinfection by germicidal UV illumination.

Abstract: The invention provides a luminescent material comprising a component selected from the group comprising (Y1-xLux)9LiSi6O26:Ln or/and AE5(PO4)3F:Ln,A, wherein Ln is a trivalent rare earth metal, AE is a divalent alkaline earth metal, and A is a monovalent alkaline metal, x>0.0 and <1.0. The luminescent material has an emission peak in the UV-C range when being excited by light in the UV spectrum range. The invention further provides a light emitting device comprising the said luminescent material and a method of using said light emitting device for disinfection or purification of air, water or surfaces.

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 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.