Abstract: A method for producing a light emitting device using two phosphors dispersed homogenously in a host matrix. The host matrix may be a polymer, such as heat and/or UV curable epoxy, silica glass, silica gel, silicone, etc. A dispersant, preferably inorganic, is applied to the host matrix to create a strong and stable three dimensional network within the host matrix. The BGS and ZnSeS phosphors are trapped equally in the three dimensional network, holding them homogenously in place within the host matrix. In one embodiment, the inorganic dispersant can be a hydrophobic formed silica, such as, for example, R812.

Abstract: A device and method for emitting output light of a desired color utilizes green-emitting Thiogallate phosphor material and red-emitting SrCaS:Eu phosphor material to convert some of the original light emitted from a light source of the device to a longer wavelength light in order to produce the desired output light. The green-emitting Thiogallate phosphor material includes at least one of CaGa2S4:Ce phosphor and BaGa4S7:Eu phosphor. The device and method can be used to produce white light or other mixed color light using the light source, which may be a blue-green light emitting diode (LED) die.

Abstract: A device and method for emitting output light utilizes Group IIA/IIB element Selenide Sulfur-based phosphor material to convert at least some of the original light emitted from a light source of the device to longer wavelength light to change the optical spectrum of the output light. Thus, the device and method can be used to produce white color light. The device and method may also utilize Thiogallate-based phosphor material.

Abstract: A device and method for emitting output light utilizes Group IIB element Selenide-based phosphor material to convert some of the original light emitted s from a light source of the device to a longer wavelength light to change the optical spectrum the output light. Thus, the device and method can be used to produce white color light. The Group IIB element Selenide-based phosphor material is included in a wavelength-shifting region optically coupled to the light source, which may be a blue-green light emitting diode (LED) die.

Abstract: A device and method for emitting output light utilizes Group IIB element Selenide-based phosphor material to convert at least some of the original light emitted from a light source of the device to a longer wavelength light to change the optical spectrum of the output light. Thus, the device and method can be used to produce white color light. The Group IIB element Selenide-based phosphor material is included in a wavelength-shifting region optically coupled to the light source, which may be a blue-green light emitting diode (LED) die.

Abstract: Methods of coating a semiconductor device with phosphor particles are disclosed. In the methods, a bath is provided which contains suspended particles of a first phosphor material and suspended particles of a second phosphor material. The particles of the first phosphor material have a mean particle size in the range from about 1 micron to about 6 microns, and the particles of the second phosphor material have a mean particle size in the range from about 12 microns to about 25 microns, wherein the particle size distribution of the phosphor material in the bath is bimodal. The semiconductor device is disposed in the bath containing the suspended particles, and a first biasing voltage is applied between an anode in electrical contact with the bath and the p side to hold the anode at a positive voltage with respect to the p side. A second biasing voltage is applied between the p side and the n side.

Abstract: A device and method for emitting output light utilizes Group IIB element Selenide-based phosphor material and/or Thiogallate-based phosphor material to convert at least some of the original light emitted from a light source of the device to longer wavelength light to change the optical spectrum of the output light. Thus, the device and method can be used to produce white color light.

Abstract: A device and method for emitting output light utilizes a mixture of Group IIB element Selenide-based phosphor material and Group IIA element Gallium Sulfide-based phosphor material in which the Group IIA element includes Calcium, Strontium and/or Barium to convert some of the original light emitted from a light source of the device to longer wavelength light to change the optical spectrum the output light. Thus, the device and method can be used to produce white color light. The mixture of Group IIB element Selenide-based and Group IIA element Gallium Sulfide-based phosphor materials is included in a wavelength-shifting region optically coupled to the light source, which may be a blue light emitting diode (LED) die.