Abstract: A light emitting device includes: at least one light emitting component (LEC) comprising a light-emitting face having a longest linear dimension D1; at least one wavelength-converting consolidated monolithic component (WCC) having a light-receiving face, a light-emitting face, and a peripheral edge. The WCC is radiationally linked to and spaced apart from the LEC at a distance D2, D2 being less than D1, wherein a projection edge of the light-emitting face of the LEC and the peripheral edge of the WCC define a shortest distance D3 therebetween, wherein a surface area of the light-receiving face of the WCC is at least 120% of that of the light-emitting face of the LEC, and the LEC and WCC are positioned relative to each other to satisfy D3/D2?1.

Abstract: Some embodiments disclosed herein include a ceramic body including a first region and a second region. The first region may include a host material and first concentration of a dopant that is effective to produce luminescence. The second region may include the host material and second concentration of the dopant. In some embodiments, the first region has an average grain size that is larger than an average grain of the second region. The ceramic body may, in some embodiments, exhibit superior internal quantum efficiency (IQE). Some embodiments disclosed herein include methods for the making and using the ceramic bodies disclosed herein. Also, some embodiments disclosed herein lighting apparatuses including the ceramic bodies disclosed herein.

Abstract: A light-emitting device includes a circuit board to which external electric power is supplied, a light emitting diode that is electrically connected onto the circuit board and emits light based on electric power from the circuit board, a housing provided on the circuit board so as to surround the light emitting diode and so that the upper end portion of the housing is positioned above the upper end portion of the light emitting diode, and a fluorescent laminate provided on the housing. The fluorescent laminate includes a first fluorescent layer that emits fluorescent light and a second fluorescent layer that emits fluorescent light having a wavelength that is longer than that of the first fluorescent layer. The second fluorescent layer is disposed on the housing and the first fluorescent layer is laminated on the second fluorescent layer.

Abstract: The present invention relates to a composite film including a wavelength conversion layer and a diffusive reflection resin layer in a laminated state and being used in a semiconductor light emitting device, in which the wavelength conversion layer contains a phosphor material which absorbs a part or all of excitation light and is excited to emit visible light in a wavelength region longer than a wavelength of the excitation light, the diffusive reflection resin layer is selectively formed with patterning on one surface of the wavelength conversion layer, and a region on the one surface of the wavelength conversion layer where the diffusive reflection resin layer is not formed with patterning is a path of the excitation light which excites the phosphor material in the wavelength conversion layer.

Abstract: Disclosed herein are emissive ceramic materials having a dopant concentration gradient along a thickness of a yttrium aluminum garnet (YAG) region. The dopant concentration gradient may include a maximum dopant concentration, a half-maximum dopant concentration, and a slope at or near the half-maximum dopant concentration. The emissive ceramics may, in some embodiments, exhibit high internal quantum efficiencies (IQE). The emissive ceramics may, in some embodiments, include porous regions. Also disclosed herein are methods of make the emissive ceramic by sintering an assembly having doped and non-doped layers.

Abstract: Disclosed herein are a laminated composite and process for making the same. The laminated composite includes at least one wavelength-converting layer and at least one non-emissive layer, wherein a vertical relief gap pattern defines the composite into a plurality of discrete separable portions, and the discrete separable portions are breakably joined by a non-emissive layer. Separation along the relief gap pattern reduces color variation amongst the discrete portions and processes.

Abstract: Disclosed herein are emissive ceramic materials having a dopant concentration gradient along a thickness of a yttrium aluminum garnet (YAG) region. The dopant concentration gradient may include a maximum dopant concentration, a half-maximum dopant concentration, and a slope at or near the half-maximum dopant concentration. The emissive ceramics may, in some embodiments, exhibit high internal quantum efficiencies (IQE). The emissive ceramics may, in some embodiments, include porous regions. Also disclosed herein are methods of make the emissive ceramic by sintering an assembly having doped and non-doped layers.

Abstract: A phosphor adhesive sheet includes a phosphor layer containing a phosphor and an adhesive layer laminated on one surface in a thickness direction of the phosphor layer. The adhesive layer is formed of a silicone resin composition having both thermoplastic and thermosetting properties.

Abstract: Some embodiments disclosed herein are related to methods of preparing a nanoparticle composition comprising: providing an aerosol comprising a plurality of droplets of a precursor solution comprising at least one nanoparticle precursor and an expansive component; passing the aerosol through a plasma; and collecting a nanoparticle composition product from the carrier gas which has exited the plasma. Some embodiments relate to nanoparticle compositions provided by this process. Some embodiments relate to light-emitting diodes or light emitting devices comprising these compositions.

Abstract: A phosphor ceramic includes at least one fluorescent layer that is capable of emitting fluorescent light; and at least one non-fluorescent layer that does not emit fluorescent light and is laminated onto the fluorescent layer.

Abstract: Some embodiments disclosed herein include a lighting apparatus having a composite. The composite may include a first emissive layer and a second emissive layer. The first emissive layer may include a first garnet phosphor having a common dopant. The second emissive layer may include a second garnet phosphor having the common dopant. In some embodiments, the first emissive layer and the second emissive layer are fixed together. Some embodiments disclosed herein include efficient and economic methods of making the composite. The method may include, in some embodiments, sintering an assembly that includes pre-cursor materials for the first emissive layer and the second emissive layer.

Abstract: A method and apparatus for sintering flat ceramics using a mesh or lattice is described herein.

Abstract: A method and apparatus for sintering flat ceramics using a mesh or lattice is described herein.

Abstract: Some embodiments disclosed herein include a ceramic body including a first region and a second region. The first region may include a host material and first concentration of a dopant that is effective to produce luminescence. The second region may include the host material and second concentration of the dopant. In some embodiments, the first region has an average grain size that is larger than an average grain of the second region. The ceramic body may, in some embodiments, exhibit superior internal quantum efficiency (IQE). Some embodiments disclosed herein include methods for the making and using the ceramic bodies disclosed herein. Also, some embodiments disclosed herein lighting apparatuses including the ceramic bodies disclosed herein.

Abstract: A light emitting device comprising a light emitting component that emits light with a first peak wavelength, and at least one sintered ceramic plate over the light emitting component is described. The at least one sintered ceramic plate is capable of absorbing at least a portion of the light emitted from said light emitting component and emitting light of a second peak wavelength, and has a total light transmittance at the second peak wavelength of greater than about 40%. A method for improving the luminance intensity of a light emitting device comprising providing a light emitting component and positioning at least one translucent sintered ceramic plate described above over the light emitting component is also disclosed.

Abstract: Some embodiments provide luminescent ceramics which have a lower amount of dopant than conventional luminescent ceramics. In some embodiments, the luminescent ceramic comprises a host material comprising a rare earth element and at least one rare earth dopant, wherein the rare earth dopant may be about 0.01% to 0.5% of the rare earth atoms present in the material. Some embodiments provide luminescent ceramic comprising: a polycrystalline phosphor represented by the formula (A1-xEx)3B5O12. Some embodiments provide a light-emitting device comprising a luminescent ceramic disclosed herein.

Abstract: A phosphor adhesive sheet includes a phosphor layer containing a phosphor and an adhesive layer laminated on one surface in a thickness direction of the phosphor layer. The adhesive layer is formed of a silicone resin composition having both thermoplastic and thermosetting properties.

Abstract: Disclosed herein are lighting apparatuses having a light source, a first phosphor, and a second phosphor, wherein the lighting apparatuses exhibit increased R9 values. In some embodiments, the light source is configured to emit radiation having a wavelength of peak emission between about 495 nm and about 500 nm. The first phosphor may have a first wavelength of peak emission between about 495 nm and about 600 nm. The second phosphor may be represented by the formula RE2-x-yCaMg2Si3O12:Cex,Ay. In an embodiment, RE is a rare earth metal; A is a co-dopant, x is greater than 0 and less than about 1.0; and y is greater than 0 and less than about 0.2. Also disclosed are phosphor compositions including the first phosphor and the second phosphor, and methods of using the same.

Abstract: Disclosed herein is a method of increasing the luminescence efficiency of a translucent phosphor ceramic. Other embodiments are methods of manufacturing a phosphor translucent ceramic having increased luminescence. Another embodiment is a light emitting device comprising a phosphor translucent ceramic made by one of these methods.