Abstract: A ceramic wavelength converter assembly may include two first layers having an undoped host material or a doped host material, two second layers having a barrier material and being disposed between the two first layers, and a third layer having an undoped host material or a doped host material and being disposed between the two second layers. The two first layers may include the undoped host material and the third layer may include the doped host material, or the two first layers may include the doped host material and the third layer may include the undoped host material. At least one of the two first layers may have a patterned structure.

Abstract: A multilayer ceramic converter with stratified scattering is disclosed. In an embodiment a ceramic wavelength converter assembly having a layered structure includes a phosphor layer, an upper barrier layer, and a lower barrier layer, wherein the phosphor layer is at least partially disposed between the upper barrier layer and the lower barrier layer.

Abstract: Methods for producing wavelength converters are described. The methods include sintering a mixture consisting essentially of first particles and second particles to form a sintered article. In embodiments the first particles consist essentially of particles of ?-SiAlON or precursors thereof, and the second particles consist essentially one or more sintering aids or precursors thereof. In embodiments the sintered article has a density that is greater than or equal to about 90% of a theoretical bulk density of the mixture, and is configured to convert primary light incident thereon to secondary light, wherein the secondary light exhibits a peak with a full width half maximum of greater than 0 to about 60 nanometers (nm) within a wavelength range of about 495 nm to about 600 nm.

Abstract: A ceramic wavelength converter assembly has a layered structure. The ceramic wavelength converter assembly includes two first layers having an undoped host material, or a doped host material, two second layers having a barrier material and being disposed between the two first layers and a third layer having an undoped host material, or a doped host material and being disposed between the two second layers. The two first layers include the undoped host material and the third layer includes the doped host material, or the two first layers include the doped host material and the third layer includes the undoped host material.

Abstract: A multilayer ceramic converter with stratified scattering is disclosed. In an embodiment a ceramic wavelength converter assembly having a layered structure includes a phosphor layer, an upper barrier layer, and a lower barrier layer, wherein the phosphor layer is at least partially disposed between the upper barrier layer and the lower barrier layer.

Abstract: A method for producing a ceramic converter element is provided. The method includes providing a phosphor as a starting material, mixing the phosphor and at least one metal oxide powder to form a mixture, and processing the mixture to form a ceramic converter material in which the phosphor is embedded in a ceramic matrix. Further, an optoelectronic component with a ceramic converter element and a ceramic converter element are provided.

Abstract: A ceramic wavelength converter assembly has a layered structure. The ceramic wavelength converter assembly includes two first layers comprising an undoped host material, or a doped host material; two second layers comprising a barrier material and being disposed between the two first layers; and a third layer comprising an undoped host material, or a doped host material and being disposed between the two second layers.

Abstract: Methods for producing wavelength converters are described. The methods include sintering a mixture consisting essentially of first particles and second particles to form a sintered article. In embodiments the first particles consist essentially of particles of ?-SiAlON or precursors thereof, and the second particles consist essentially one or more sintering aids or precursors thereof. In embodiments the sintered article has a density that is greater than or equal to about 90% of a theoretical bulk density of the mixture, and is configured to convert primary light incident thereon to secondary light, wherein the secondary light exhibits a peak with a full width half maximum of greater than 0 to about 60 nanometers (nm) within a wavelength range of about 495 nm to about 600 nm.

Abstract: A composite oxynitride ceramic converter and a light source having the same are disclosed. In an embodiment the composite oxynitride ceramic converter includes a first phase of a triclinic SrSi2O2N2:Eu phosphor and a second phase of a hexagonal Sr3Si6N4O9:Eu phosphor.

Abstract: There is herein described a composite ceramic wavelength converter having a first phase of an ?-SiAlON:Eu phosphor and a second phase of a ?-SiAlON:Eu phosphor. The converter may be used in a phosphor-converted light emitting diode to form a light source having a correlated color temperature (CCT) from 2000K to 4500K.