Abstract: Provided are systems and methods for determining physical properties of solids in solution or suspension. In some embodiments, the present methods employ absorbance for determining the amount of a first material which is adsorbed by a second material when the two are made to contact one another. Through use of the present system and methods it is possible to accurately determine the amount of an air entraining agent which is adsorbed by a particular lot of a fly ash material used in the production of cements and concretes. Use of the technology disclosed herein eliminates errors in formulation of cements and prevents large amounts of waste concrete being generated using prior art methods, which translates to significant savings of resources, both material and financial.

Abstract: A method of making an LED device and an LED device using a high-silica, fully-sintered glass substrate is provided. The high-silica substrate is at least 99% silica and is thin, such as less than 200 ?m in thickness. A phosphor containing layer is deposited on to the substrate and is laser sintered on the substrate such that a portion of the sintered phosphor layer embeds in the material of the substrate.

Abstract: A method of making an LED device and an LED device using a high-silica, fully-sintered glass substrate is provided. The high-silica substrate is at least 99% silica and is thin, such as less than 200 ?m in thickness. A phosphor containing layer is deposited on to the substrate and is laser sintered on the substrate such that a portion of the sintered phosphor layer embeds in the material of the substrate.

Abstract: A light converter, and lights and displays incorporating the light converter are disclosed together with methods of making the light converter. The light converter has a substrate having a first layer of phosphor particles disposed on an area of one surface of the substrate. The first layer has a thickness of about 1 monolayer of phosphor particles, and the phosphor particles in the first layer form a uniform and dense layer. The thickness of the substrate can be between about 25 ?m and about 500 ?m in embodiments intended to be flexible and between about 0.5 mm and 2 mm in embodiments that can be formed into rigid shapes. The screen weight of the phosphor particles is between about 0.5 mg/cm2 and about 40 mg/cm2. The substrate can include a base layer and an adhesive layer.

Abstract: A light converter, and lights and displays incorporating the light converter are disclosed together with methods of making the light converter. The light converter has a substrate having a first layer of phosphor particles disposed on an area of one surface of the substrate. The first layer has a thickness of about 1 monolayer of phosphor particles, and the phosphor particles in the first layer form a uniform and dense layer. The thickness of the substrate can be between about 25 ?m and about 500 ?m in embodiments intended to be flexible and between about 0.5 mm and 2 mm in embodiments that can be formed into rigid shapes. The screen weight of the phosphor particles is between about 0.5 mg/cm2 and about 40 mg/cm2. The substrate can include a base layer and an adhesive layer.

Abstract: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formulae: MSxSey: B in which x, and y are each independently any value between about 0 and about 1, subject to the proviso that the sum of x and y is equal to any number in the range of between about 0.75 and about 1.25; M is at least one of Be, Mg, Ca, Sr, Ba, Zn, excepting Zn alone; and wherein the activator(s) B comprises one or more elements selected from the group consisting of: Eu, Ce, Cu, Ag, Al, Tb, Sb, Bi, K, Na, Cl, F, Br, I, Mg, Pr, and Mn, including mixtures comprising any two, any three, any four, any five, any six, any seven, or more of these elements in any proportion, and wherein the elements in these mixtures may each independently be present in any amount between 0.0001% and about 10% in mole percent based on the total molar weight of said composition.

Abstract: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formulae: MA2(SxSey)4:B and/or M2A4(SxSey)7:B in which x, and y are each independently any value between 0 and 1, including 0 and 1 subject to the proviso that the sum of x and y is equal to any number in the range of between about 0.75 and about 1.25; M is at least one of Be, Mg, Ca, Sr, Ba, Zn; A is at least one of Al, Ga, In, Y, La, and Gd; and wherein the activator(s), B, comprises one or more element selected from the group consisting of: Eu, Ce, Cu, Ag, Al, Tb, Cl, Br, F, I, Mg, Pr, K, Na, and Mn, including mixtures comprising any two, any three, any four, any five, any six, any seven, or more of these elements in any proportion, and wherein the elements in these mixtures may each independently be present in any amount between 0.0001% and about 10% in mole percent based on the total molar weight of said composition.

Abstract: The invention provides compositions, which are mixtures of phosphors. The compositions comprise a first component described by the formula: M1SxSey:B1 and a second component that comprises a material described by the formula M2Am(SpSeq)n:B2, in which: M1 and M2 may be any metal species and B1 and B2 may be any activator, typically a metal species, with the remaining variables representing effective numerical values necessary for conferring electrical neutrality to the compositions. A phosphor mixture according to the invention is produced by first preparing individual components, and then physically mixing the components, as in a mortar or ball mill.

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: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formula: described by the formula: ZnSxSey:Cu,A in which x and y are each independently any value between 0 and about 1, subject to the proviso that the sum of x and y is equal to any number in the range of between about 0.75 and about 1.25; wherein A is optional and comprises at least one additional element selected from the group consisting of: Ag, Al, Ce, Tb, Cl, I, Mg, and Mn, including mixtures thereof, and wherein Cu is present in any amount between about 0.0001% and about 5% in mole percent based on the total molar weight of said composition. Standard techniques used in phosphor deposition for the manufacture of light emitting diodes which comprise phosphors may be employed to produce LED's having a white light output when the phosphors of the invention are utilized.

Abstract: A device and method for emitting output light utilizes orange/red light emitting ZnSe0.5S0.5:Cu,Cl phosphor material and green light emitting BaSrGa4S7:Eu phosphor material to convert 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. The device and method can be used to produce white color light using the light source, which may be a blue light emitting diode (LED) die. The orange/red light emitting ZnSe0.5S0.5:Cu,Cl phosphor material and green light emitting BaSrGa4S7:Eu phosphor material are included in a wavelength-shifting region optically coupled to the light source.

Abstract: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formula: SrxBayCazSiO4:Eu in which x, y, and z are each independently variable to be any value between about 0 and about 2, including without limitation 0.001 and 2, and every thousandth therebetween, subject to the proviso that the sum of x, y, or z is equal to at least 1, and in which Eu is present in any amount between about 0.0001% and about 5% by weight based upon the phosphor's total weight, wherein substantially all of the europium present is present in the divalent state. A phosphor according to the invention may optionally further comprise an element selected from the group consisting of: Ce, Mn, Ti, Pb, and Sn and is present in any amount between about 0.0001% and about 5% by weight based on the phosphor's total weight.

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: 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 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.

Abstract: The present invention provides a process and apparatus for selectively depositing materials on a semiconductor device, such as depositing phosphors or other optical materials on a light emitting diode (LED), using an electrophoretic deposition process. The semiconductor device comprises a p-side and an n-side. A first biasing voltage is applied between an anode and the p-side of the semiconductor device. A second biasing voltage is applied between the p-side and the n-side of the semiconductor device. The relative biasing of the p-side and the n-side determines where coating is deposited on the semiconductor device. An optional pre-coating process is used to deposit a high resistivity dielectric material, such as silica, on the semiconductor device. The pre-coating can even the electric field on the surface of the semiconductor device, where local features such as metal connections or passivation layers disturb the electric field during phosphor deposition without pre-coating.

Abstract: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formulae: MSxSey: B in which x, and y are each independently any value between about 0 and about 1, subject to the proviso that the sum of x and y is equal to any number in the range of between about 0.75 and about 1.25; M is at least one of Be, Mg, Ca, Sr, Ba, Zn, excepting Zn alone; and wherein the activator(s) B comprises one or more elements selected from the group consisting of: Eu, Ce, Cu, Ag, Al, Tb, Sb, Bi, K, Na, Cl, F, Br, I, Mg, Pr, and Mn, including mixtures comprising any two, any three, any four, any five, any six, any seven, or more of these elements in any proportion, and wherein the elements in these mixtures may each independently be present in any amount between 0.0001% and about 10% in mole percent based on the total molar weight of said composition.

Abstract: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formula: described by the formula: ZnSxSey:Cu,A in which x and y are each independently any value between 0 and about 1, subject to the proviso that the sum of x and y is equal to any number in the range of between about 0.75 and about 1.25; wherein A is optional and comprises at least one additional element selected from the group consisting of: Ag, Al, Ce, Tb, Cl, I, Mg, and Mn, including mixtures thereof, and wherein Cu is present in any amount between about 0.0001% and about 5% in mole percent based on the total molar weight of said composition. Standard techniques used in phosphor deposition for the manufacture of light emitting diodes which comprise phosphors may be employed to produce LED's having a white light output when the phosphors of the invention are utilized.

Abstract: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes. The phosphors provided by the invention are described by the formulae: MA2(SxSey)4:B and/or M2A4(SxSey)7:B in which x, and y are each independently any value between 0 and 1, including 0 and 1 subject to the proviso that the sum of x and y is equal to any number in the range of between about 0.75 and about 1.25; M is at least one of Be, Mg, Ca, Sr, Ba, Zn; A is at least one of Al, Ga, In, Y, La, and Gd; and wherein the activator(s), B, comprises one or more element selected from the group consisting of: Eu, Ce, Cu, Ag, Al, Tb, Cl, Br, F, I, Mg, Pr, K, Na, and Mn, including mixtures comprising any two, any three, any four, any five, any six, any seven, or more of these elements in any proportion, and wherein the elements in these mixtures may each independently be present in any amount between 0.0001% and about 10% in mole percent based on the total molar weight of said composition.

Abstract: Provided herein are novel phosphors useful in the manufacture of white light emitting diodes.