Abstract: Phosphor compositions including those having the formulas A2-xEuxW1-yMoyO6, where A is selected from Y, Gd, Lu, La, and combinations thereof; and where 0.5?x?1.0, 0.01?y?1.0; MmOnX, wherein M is selected from the group of Sc, Y, a lanthanide, an alkali earth metal and mixtures thereof; X is a halogen; 1?m?3; and 1?n?4, and wherein the lanthanide doping level can range from 0.1 to 40% spectral weight; and Eu3+ activated phosphate or borate phosphors. Also disclosed are light emitting devices including a light source and at least one of the above phosphor compositions.

Abstract: A light source including a specific LED and phosphor combination capable of emitting white light for direct illumination. In one embodiment, the light source includes an LED chip emitting in the 460-470 nm range radiationally coupled to a phosphor comprising Ca8Mg(SiO4)4Cl2:Eu2+,Mn2+. In a second embodiment, the light source includes an LED chip emitting at about 430 nm and a phosphor comprising a blend of Sr4Al14O25:Eu2+ (SAE) and a second phosphor having the formula(Tb1-x-yAxREy)3DzO12, where A is a member selected from the group consisting of Y, La, Gd, and Sm; RE is a member selected from the group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu; D is a member selected from the group consisting of Al, Ga, and In; x is in the range from 0 to about 0.5, y is in the range from about 0 to about 0.2, and z is in the range from about 4 to about 5. Both embodiments produce light having the coordinates x=0.240-0.260 and y=0.340-0.360 on the CIE chromaticity diagram.

Abstract: A lamp containing a radiation source, a luminescent material and a radiation scattering material located between the radiation source and the luminescent material is provided. The lamp may be a white emitting lamp. The radiation source may be a blue emitting LED. The luminescent material may be a yellow emitting phosphor or dye. The radiation scattering material may be ceramic particles, such as TiO2 particles, in a carrier medium, such as glass, epoxy or silicone.

Abstract: A light source including a specific LED and phosphor combination capable of emitting white light for direct illumination. In one embodiment, the light source includes an LED chip emitting in the 460-470 nm range radiationally coupled to a phosphor comprising Ca8Mg(SiO4)4Cl2:Eu2+,Mn2+. In a second embodiment, the light source includes an LED chip emitting at about 430 nm and a phosphor comprising a blend of Sr4Al14O25:Eu2+ (SAE) and a second phosphor having the formula(Tb1-x-yAxREy)3DzO12, where A is a member selected from the group consisting of Y, La, Gd, and Sm; RE is a member selected from the group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu; D is a member selected from the group consisting of Al, Ga, and In; x is in the range from 0 to about 0.5, y is in the range from about 0 to about 0.2, and z is in the range from about 4 to about 5. Both embodiments produce light having the coordinates x=0.240-0.260 and y=0.340-0.360 on the CIE chromaticity diagram.

Abstract: A light source including a specific LED and phosphor combination capable of emitting white light for direct illumination. In one embodiment, the light source includes an LED chip emitting in the 380-420 nm range radiationally coupled to a phosphor blend first phosphor selected from the group consisting of (Sr,Ba,Ca,Mg)5(PO4)3Cl:Eu2+ (SECA) and BaMg2Al16O27:Eu2+ with a second phosphor having the formula (Tb1-x-yAxREy)3DzO12 (TAG), where A is a member selected from the group consisting of Y, La, Gd, and Sm; RE is a member selected from the group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu; D is a member selected from the group consisting of Al, Ga, and In; x is in the range from 0 to about 0.5, y is in the range from about 0 to about 0.2, and z is in the range from about 4 to about 5. The light source thus produced will provide a high quality white light.

Abstract: A light source including a specific LED and phosphor combination capable of emitting white light for direct illumination. In one embodiment, the light source includes an LED chip emitting in the 380-420 nm range radiationally coupled to a phosphor blend first phosphor selected from the group consisting of (Sr,Ba,Ca,Mg)5(PO4)3Cl:Eu2+ (SECA) and BaMg2Al16O27:Eu2+ with a second phosphor having the formula (Tb1-x-yAxREy)3DzO12 (TAG), where A is a member selected from the group consisting of Y, La, Gd, and Sm; RE is a member selected from the group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu; D is a member selected from the group consisting of Al, Ga, and In; x is in the range from 0 to about 0.5, y is in the range from about 0 to about 0.2, and z is in the range from about 4 to about 5. The light source thus produced will provide a high quality white light.

Abstract: UV reflectors incorporated in UV LED-based light sources reduce the amount of UV radiation emission into the surroundings and increase the efficiency of such light sources. UV reflectors are made of nanometer-sized particles having a mean particle diameter less than about one-tenth of the wavelength of the UV light emitted by the UV LED, dispersed in a molding or casting material surrounding the LED. Other UV reflectors are series of layers of materials having alternating high and low refractive indices; each layer has a physical thickness of one quarter of the wavelength divided by the refractive index of the material. Nanometer-sized textures formed on a surface of the multilayered reflector further reduce the emission of UV radiation into the surroundings. UV LED-based light sources include such a multilayered reflector disposed on an encapsulating structure of a transparent material around a UV LED, particles of a UV-excitable phosphor dispersed in the transparent material.

Abstract: Phosphor blends are disclosed that are capable of absorbing electromagnetic radiation having wavelengths in the range from about 315 nm to about 480 nm. These blends are mixtures of phosphors selected from the group consisting of Sr2P2O7:Eu2+, Mn2+, (Ca,Sr,Ba)5(PO4)3(F,Cl,OH):Eu2+,Mn2+, 3.5 MgO.0.5MgF2.GeO2:Mn4+, Sr4Al14O25:Eu2+, (Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+, (Ba,Ca,Sr)2MgAl16O27:Eu2+, and (Ba,Ca,Sr)2MgAl16O27:Eu2+,Mn2+. White light sources are obtained by applying a phosphor blend over at least one LED that is capable of emitting electromagnetic radiation in the above-noted wavelength range.

Abstract: UV reflectors incorporated in UV LED-based light sources reduce the amount of UV radiation emission into the surroundings and increase the efficiency of such light sources. UV reflectors are made of nanometer-sized particles having a mean particle diameter less than about one-tenth of the wavelength of the UV light emitted by the UV LED, dispersed in a molding or casting material surrounding the LED. Other UV reflectors are series of layers of materials having alternating high and low refractive indices; each layer has a physical thickness of one quarter of the wavelength divided by the refractive index of the material. Nanometer-sized textures formed on a surface of the multilayered reflector further reduce the emission of UV radiation into the surroundings. UV LED-based light sources include such a multilayered reflector disposed on an encapsulating structure of a transparent material around a UV LED, particles of a UV-excitable phosphor dispersed in the transparent material.

Abstract: Phosphor blends are disclosed that are capable of absorbing electromagnetic ation having wavelengths in the range from about 315 nm to about 480 nm. O25:Eu2+,(Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+,(Ba,Ca,Sr)2MgAl16O27: Eu2+, and (Ba,Ca,Sr)2MgAl16O27:Eu2+,Mn2+. White light sources are obtained by lying a phosphor blend over at least one LED that is capable of emitting electromagnetic radiation in the above-noted wavelength range.