Inorganic Luminescent Compositions Patents (Class 252/301.4R)
  • Patent number: 9039933
    Abstract: Embodiments of the present disclosure relate to visible luminescent phosphors, visible luminescent nanobelt phosphors, methods of making visible luminescent phosphors, methods of making visible luminescent nanobelt phosphors, mixtures of visible luminescent phosphors, methods of using visible luminescent phosphors, waveguides including visible luminescent phosphors, white light emitting phosphors, and the like.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: May 26, 2015
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Zhengwei Pan, Feng Liu, Xufan Li
  • Patent number: 9028717
    Abstract: The use of glow-in-the-dark materials, such as phosphors or long-persistent glow materials which incorporate the use of rare earth elements (i.e. “glow materials”); wherein the glow crystal sizes are 0.5 mm to 10.0 mm in size and to be contained or placed in various forms such as solutions, polymer matrixes both rigid and non-rigid, containers, or flexible vacuum pouches or combinations of same wherein the concentration and size of such glow particles create a light source not heretofore achieved by prior art.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: May 12, 2015
    Inventor: Stephen Roy Nagel
  • Patent number: 9023242
    Abstract: Disclosed herein are green-emitting, garnet-based phosphors having the formula (Lu1-a-b-cYaTbbAc)3(Al1-dBd)5(O1-eCe)12:Ce,Eu, where A is selected from the group consisting of Mg, Sr, Ca, and Ba; B is selected from the group consisting of Ga and In; C is selected from the group consisting of F, Cl, and Br; and 0?a?1; 0?b?1; 0<c?0.5; 0?d?1; and 0<e?0.2. These phosphors are distinguished from anything in the art by nature of their inclusion of both an alkaline earth and a halogen. Their peak emission wavelength may lie between about 500 nm and 540 nm; in one embodiment, the phosphor (Lu,Y,A)3Al5(O,F,Cl)12:Eu2+ has an emission at 540 nm. The FWHM of the emission peak lies between 80 nm and 150 nm. The present green garnet phosphors may be combined with a red-emitting, nitride-based phosphor such as CaAlSiN3 to produce white light.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: May 5, 2015
    Assignee: Intematix Corporation
    Inventors: Yusong Wu, Dejie Tao, Shifan Cheng, Yi-Qun Li
  • Patent number: 9017575
    Abstract: An object of the present invention is to provide a phosphorescent phosphor having an excellent afterglow luminance after 10 to 12 hours after sunset under the outdoor excitation conditions. The phosphorescent phosphor is represented by the formula (Sr1-a-b-x-yMgaBabEuxDyy)Al2O4, wherein a satisfies a relation 0.02?a?0.1, b satisfies a relation 0.03?b?0.15, x satisfies a relation 0.001?x?0.04, y satisfies a relation 0.004?y?0.05, and (a+b) satisfies a relation 0.08?(a+b)?0.2. The phosphorescent phosphor has an excellent afterglow luminance after a long period of period of time in a manner most suitable for outdoor applications.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: April 28, 2015
    Assignee: Nemoto Lumi-Materials Company Limited
    Inventors: Tomoya Sakaguchi, Chisako Higuchi
  • Publication number: 20150108404
    Abstract: A polycrystalline ceramic scintillator body includes a ceramic scintillating material comprising an oxide of gadolinium (Gd) and a second rare earth element (Re). The ceramic scintillating material has a composition, expressed in terms of molar percentage of oxide constituents, that includes greater than fifty-five percent (55%) Gd2O3 and a minority percentage of Re2O3. The ceramic scintillating material includes an activator.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 23, 2015
    Inventors: Brian C. LaCourse, Anne B. Hardy, Helene Laetitia Retot, Qiwei Chen, Xiaofeng Peng, Bruno Viana, Morteza Zandi
  • Patent number: 9011720
    Abstract: Embodiments are directed to glass frits containing phosphors that can be used in LED lighting devices and for methods associated therewith for making the phosphor containing glass frit and their use in glass articles, for example, LED devices.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: April 21, 2015
    Assignee: Corning Incorporated
    Inventors: Bruce Gardiner Aitken, Michael Edward Badding, Nicholas Francis Borrelli, Nadja Teresia Lonnroth, Mark Alejandro Quesada
  • Patent number: 9011717
    Abstract: Phosphor compositions, white phosphor compositions, methods of making white phosphor compositions, tinted white phosphor compositions, methods of making tinted white phosphor compositions, LEDs, methods of making LEDs, light bulb structures, paints including phosphor compositions, polymer compositions including phosphor compositions, ceramics including phosphor compositions, and the like are provided.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: April 21, 2015
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: William M. Yen, Zhiyi He, Sergei Basun, Xiao-jun Wang, Gennaro J. Gama
  • Publication number: 20150083967
    Abstract: A phosphor (and a method for manufacturing the same, and a light-emitting device that uses this phosphor) includes single crystals including YAG crystals as a mother crystal, the quantum efficiency of the phosphor at 25° C. being 92% or higher at an excitation light wavelength of 460 nm.
    Type: Application
    Filed: April 18, 2013
    Publication date: March 26, 2015
    Inventors: Makoto Watanabe, Daisuke Inomata, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
  • Patent number: 8980132
    Abstract: Provided are a luminescent material and a preparing method thereof. The borosilicate luminescent material has a chemical formula of aM2O.bLn2O3.cAl2O3.dR2O3.eSiO2.fCeO2.gTb2O3 or aMO.bLn2O3.cAl2O3.dR2O3.eSiO2.fCeO2.gTb2O3, wherein M is alkaline earth metal or alkali metal, Ln is one or two elements selected from the group consisting of elements Y and Gd; R is one or two elements selected from the group consisting of elements B and P; a, b, c, d, e, f, and g are molar fractions, and 6?a?20, 3?b?12, 20?c?30, 32?d?45, 0?e?12, 0.01?f?1, and 0.05?g?1.5. The preparing methods comprises the following steps: 1) selecting source compounds of above elements; 2) mixing and grinding the source compounds to obtain a mixture; 3) presintering the mixture, then grinding the mixture; 4) sintering under reducing atmosphere, and cooling, thereby obtaining the luminescent material.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: March 17, 2015
    Assignee: Ocean's King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Qingtao Li, Wenbo Ma
  • Patent number: 8980130
    Abstract: Liquid phase suspensions of substantially monocrystalline rare-earth borate particles, the mean size thereof ranging from 100 to 400 nm, are prepared by roasting a rare earth borocarbonate or hydroxyborocarbonate at a temperature which is sufficient for forming a borate and obtaining a product whose specific surface area is equal to or greater than 3 m2/g and then wet grinding the roasted product; such borates are useful in the form of luminophors, in particular, as luminescent transparent materials.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: March 17, 2015
    Assignee: Rhodia Operations
    Inventors: Valerie Buissette, Thierry Le-Mercier, Yvan Montardi, Laurent Thiers
  • Patent number: 8968600
    Abstract: Disclosed herein are phosphor compositions having high gadolinium concentrations. Some embodiments include a thermally stable ceramic body comprising an emissive layer, wherein said emissive layer comprises a compound represented by the formula (A1-x-zGdxDz)3B5O12, wherein: D is a first dopant selected from the group consisting of Nd, Er, Eu, Mn, Cr, Yb, Sm, Tb, Ce, Pr, Dy, Ho, Lu and combinations thereof; A is selected from the group consisting of Y, Lu, Ca, La, Tb, and combinations thereof; B is selected from the group consisting of Al, Mg, Si, Ga, In, and combinations thereof; x is in the range of about 0.20 to about 0.80; and z is in the range of about 0.001 to about 0.10. Also disclosed are thermally stable ceramic bodies that can include the composition of formula I. Methods of making the ceramic body and a lighting device including the ceramic body are also disclosed.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: March 3, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Bin Zhang, Amane Mochizuki, Toshitaka Nakamura, Guang Pan, Hiroaki Miyagawa, Hironaka Fujii
  • Patent number: 8951439
    Abstract: A population of light-emissive nitride nanoparticles has a photoluminescence quantum yield of at least 10% and an emission spectrum having a full width at half maximum intensity (FWHM) of less than 100 nm. One suitable method of producing light-emissive nitride nanoparticles comprises a first stage of heating a reaction mixture consisting essentially of nanoparticle precursors in a solvent, the nanoparticle precursors including at least one metal-containing precursor and at least one first nitrogen-containing precursor, and maintaining the reaction mixture at a temperature to seed nanoparticle growth. It further comprises a second stage of adding at least one second nitrogen-containing precursor to the reaction mixture thereby to promote nanoparticle growth.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: February 10, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Michael Alan Schreuder, Peter Neil Taylor
  • Patent number: 8940187
    Abstract: Provided are a ceramic composite for light conversion, which is capable of maintaining a high radiant flux even when the proportion of Gd and Ce is increased to tune the fluorescence peak wavelength to the longer wavelength side, a process for producing the ceramic composite, and a light emitting device including the ceramic composite.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: January 27, 2015
    Assignee: UBE Industries, Ltd
    Inventors: Hideki Ohtsubo, Shin-Ichi Sakata, Shinichi Ishitobi, Yasuyuki Ichizono, Norifumi Miyamoto, Hisayoshi Iba
  • Patent number: 8936733
    Abstract: Borate luminescent materials, preparation methods and uses thereof are provided. The luminescent material is a blend of metal M nanoparticles and (In1-xRex)BO3, wherein Re is one or two selected from Tm, Tb, Eu, Sm, Gd, Dy and Ce, M is one or two selected from metal nano particles of Au, Ag, Pt or Pd, 0<x?0.5, 0<z?1×10?2. Compared to the luminescent materials in the prior art, the said luminescent materials have higher luminous intensity and luminous efficiency, which can be used in field emission displays or light source.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: January 20, 2015
    Assignee: Ocean's King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Jun Liu, Wenbo Ma
  • Patent number: 8932487
    Abstract: Disclosed is a strontium cerate luminescent material having a chemical formula of Sr2CeO4:xM and comprising the luminescent material Sr2CeO4 and metal nanoparticle M, and the preparation method thereof, where M is at least one of Ag, Au, Pt and Pd, and x is a molar ratio of M to the luminescent material Sr2CeO4 and 0<x?1×10?2. The strontium cerate luminescent material of the present invention, through doping the luminescent material with metal particles, improves luminous intensity of the luminescent material by making use of the surface plasmon resonance generated by surface of the metal particles; besides, the doped metal ion can improve electrical conductivity of the luminescent material, and guarantee that the luminescent material has higher brightness in field emission devices or LEDs. The preparation method of the present invention has the advantages of simple operation, no pollution, easy control, low requirements for equipment, and being favorable to industrialized production.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: January 13, 2015
    Assignee: Ocean King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Jun Liu, Wenbo Ma
  • Patent number: 8932488
    Abstract: There is provided a thermoluminescent phosphor characterized in that a distribution of the emission intensity of thermoluminescence is present in a visible range that does not overlap the peak of the heating-caused emission intensity of the thermoluminescent phosphor itself and also has one peak within a temperature range in which a resin to be used as a binder can resist heat optically. There is also provided a method of producing the thermoluminescent phosphor. More specifically, there are provided a thermoluminescent phosphor that comprises lithium heptaborate as a base material and copper as a luminescent center present in the base material and which is characterized in that the distribution of the emission intensity of thermoluminescence versus temperature is a sole and monomodal distribution within the range of from 45° C. to 130° C., and a method of producing the thermoluminescent phosphor.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: January 13, 2015
    Assignee: Rikkyo Gakuin
    Inventors: Akio Urushiyama, Yuji Tomizawa
  • Patent number: 8900480
    Abstract: A ceramic composite material for light conversion, which is a solidified body comprising two or more matrix phases with respective components being two or more oxides selected from the group consisting of metal oxides and complex oxides each produced from two or more metal oxides, wherein at least one of the matrix phases is a phosphor phase containing an activated oxide. The solidified body is preferably obtained by the unidirectional solidification method. The ceramic composite material for light conversion is excellent in brightness, light-mixing property, heat resistance and ultraviolet light resistance.
    Type: Grant
    Filed: January 19, 2004
    Date of Patent: December 2, 2014
    Assignee: Ube Industries, Ltd.
    Inventors: Shin-ichi Sakata, Yoshiharu Waku
  • Patent number: 8900482
    Abstract: A light emitting device is disclosed. The light emitting device may include a light emitting diode (LED) for emitting light and phosphor adjacent to the LED. The phosphor may be excitable by light emitted by the LED and may include a first compound having a host lattice comprising first ions and oxygen. In one embodiment, the host lattice may include silicon, the copper ions may be divalent copper ions and first compound may have an Olivin crystal structure, a ?-K2SO4 crystal structure, a trigonal Glaserite (K3Na(SO4)2) or monoclinic Merwinite crystal structure, a tetragonal Ackermanite crystal structure, a tetragonal crystal structure or an orthorhombic crystal structure. In another embodiment, the copper ions do not act as luminescent ions upon excitation with the light emitted by the LED.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: December 2, 2014
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Gundula Roth, Walter Tews, Chung-Hoon Lee
  • Patent number: 8900481
    Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: December 2, 2014
    Assignee: Board of Trustees of The University of Arkansas
    Inventors: Xiaogang Peng, Jianqing Li, David Battaglia, Y. Andrew Wang, Yunjun Wang
  • Patent number: 8894883
    Abstract: Fluorescent materials and preparation methods thereof are provided. The fluorescent materials are represented by the general formula: M, Zn1-xAlxO and Y2O3: Re, wherein Re is at least one selected from Eu and Tb, M is at least one selected from Ag, Au, Pt and Pd in the form of nano-particle, and 0<×?0.05. The said methods include the following steps: step 1, preparing a colloid of Zn1-xAlxO; step 2, preparing a colloid of Y and Re containing the metal element M; step 3, mixing the colloid of Zn1-xAlxO with the colloid of Y and Re, aging and heating treatment to form the fluorescent materials. Compared to the Y2O3 fluorescent materials in the art the present fluorescent materials have higher luminescence efficiency, conductivity, long life and industrial applicability.
    Type: Grant
    Filed: June 12, 2010
    Date of Patent: November 25, 2014
    Assignee: Ocean's King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Ting Lv, Yewen Wang, Wenbo Ma
  • Patent number: 8894882
    Abstract: Phosphors based on doping of an activator (an emitter) into a host matrix are disclosed herein. Such phosphors include alkaline gallate phosphors doped with Cr3+ or Ni2+ ions, which in some embodiments can exhibit persistent infrared phosphorescence for as long as 200 hours. Such phosphors can be used, for example, as components of a luminescent paint.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: November 25, 2014
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Zhengwei Pan, Wuzhao Yan
  • Publication number: 20140332722
    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.
    Type: Application
    Filed: July 29, 2014
    Publication date: November 13, 2014
    Inventors: GUANG PAN, HIROAKI MIYAGAWA, HIRONAKA FUJII, BIN ZHANG, RAJESH MUKHERJEE, TOSHITAKA NAKAMURA, AMANE MOCHIZUKI
  • Patent number: 8883040
    Abstract: A luminescent material is disclosed. The luminescent material may include a first compound having a host lattice comprising first ions and oxygen. A first portion of the first ions may be substituted by copper ions. In one embodiment, the host lattice may include silicon, the copper ions may be divalent copper ions and the first compound may have an Olivine crystal structure, ?-K2SO4 crystal structure, a trigonal Glaserite (K3Na(SO4)2) or monoclinic Merwinite crystal structure, a tetragonal Ackermanite crystal structure, a tetragonal crystal structure or an orthorhombic crystal structure. In another embodiment, the copper ions do not act as luminescent ions upon excitation with the ultraviolet or visible light.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: November 11, 2014
    Assignee: Seoul Semiconductor Co., Ltd.
    Inventors: Gundula Roth, Walter Tews, Chung-Hoon Lee
  • Patent number: 8877093
    Abstract: A polycrystalline ceramic scintillator body includes a ceramic scintillating material comprising an oxide of gadolinium (Gd) and a second rare earth element (Re). The ceramic scintillating material has a composition, expressed in terms of molar percentage of oxide constituents, that includes greater than fifty-five percent (55%) Gd2O3 and a minority percentage Of Re2O3. The ceramic scintillating material includes an activator.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: November 4, 2014
    Assignees: Saint-Gobain Ceramics & Plastics, Inc., Centre National de la Recherche Scientifique
    Inventors: Brian C. LaCourse, Anne B. Hardy, Hélène Loetitia Rétot, Qiwei Chen, Xiaofeng Peng, Bruno Viana, Morteza Zandi
  • Patent number: 8871114
    Abstract: Disclosed herein are emissive ceramic elements having low amounts of certain trace elements. Applicants have surprisingly found that a lower internal quantum efficiency (IQE) may be attributed to specific trace elements that, even at very low amounts (e.g., 50 ppm or less), can cause significant deleterious effects on IQE. In some embodiments, the emissive ceramic element includes a garnet host material and an amount of Ce dopant. The emissive ceramic element may, in some embodiments, have an amount of Na in the composition less than about 67 ppm, an amount of Mg in the composition less than about 23 ppm, or an amount of Fe in the composition less than about 21 ppm.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: October 28, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Hiroaki Miyagawa, Bin Zhang, James Chienchung Shih
  • Patent number: 8865022
    Abstract: Phosphor particles are provided in the form of spherical polycrystalline secondary particles consisting of a multiplicity of primary particles, including a garnet phase having the composition: (AxByCz)3C5O12 wherein A is Y, Gd, and/or Lu, B is Ce, Nd, and/or Tb, C is Al and/or Ga, and x, y and z are in the range: 0.002<y?0.2, 0<z?2/3, and x+y+z=1. The phosphor particles are prepared by granulating powder oxides containing one or more of the elements A, B, and C, melting the granules in a plasma and solidifying outside the plasma, and heat treating the resulting particles in a non-oxidizing atmosphere at a temperature of higher than 800° C. to 1,700° C.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: October 21, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Toshihiko Tsukatani, Kazuhiro Wataya, Yasushi Takai, Takehisa Minowa
  • Patent number: 8840809
    Abstract: This invention discloses a solution-based synthesis of cesium tin tri-iodide (CsSnI3) film. More specifically, the invention is directed to a solution-based spray-coating synthesis of cesium tin tri-iodide (CsSnI3) thin films. This invention is also directed to effective and inexpensive methods to synthesize the thin CsSnI3 films on large-area substrates such as glass, ceramics, glass, ceramic, silicon, and metal foils. CsSnI3 films are ideally suited for a wide range of applications such as light emitting and photovoltaic devices.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: September 23, 2014
    Inventors: Kai Shum, Zhuo Chen, Yuhang Ren
  • Publication number: 20140246624
    Abstract: This disclosure is directed to systems and methods for sorting a native aggregate, such as a fluorescent nanoparticle aggregate, which includes multiple objects, some of which have different characteristics, into lower level ensembles, such as monochromatic nanoparticle ensembles. In one aspect, the system includes two detectors, one of which accepts all emitted wavelengths and another one which is preceded by a filter to permit transmission of a specific wavelength or range of wavelengths. In another aspect, the system includes multiple detectors, each detector configured to detect a given wavelength or range of wavelengths, such that no two detectors have overlapping wavelengths or ranges. In yet another aspect, the system includes an optical regulator in front of a detector. This disclosure is also directed to systems and methods for multiplexing and analyzing a target analyte using the monochromatic nanoparticle ensembles.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 4, 2014
    Applicant: RareCyte, Inc.
    Inventors: Ronald Seubert, Paul Spatafore, Joshua Nordberg
  • Patent number: 8821759
    Abstract: A rare earth ion doped lanthanum gallate luminous material containing metal particles and preparation method thereof are provided. The chemical formula of the lanthanum gallate luminous material is La1-xGaO3:Lnx,My, wherein Ln is one or more of Tm3+, Tb3+, Eu3+ and Sm3+, M is one of Ag, Au, Pt and Pd, the value range of x is 0.001 to 0.1, and the value range of y is 0.00002 to 0.01. The luminous performance of the lanthanum gallate luminous material can be greatly improved under the same excitation condition and the wavelength of emission light doesn't change, due to the introduction of metal particles into the rare earth ion doped lanthanum gallate luminous material. The lanthanum gallate luminous material has excellent luminous performance, and its emitting photochromic purity and light emitting luminance after excitation are high, so it can be used widely in various kinds of light emitting devices.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: September 2, 2014
    Assignee: Ocean's King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Wenbo Ma, Ting Lv
  • Patent number: 8778226
    Abstract: A photoluminescent or electroluminescent system and method of making a non-luminescent nanostructured material into such a luminescent system is presented. The method of preparing the luminescent system, generally, comprises the steps of modifying the surface of a nanostructured material to create isolated regions to act as luminescent centers and to create a charge imbalance on the surface; applying more than one polar molecule to the charged surface of the nanostructured material; and orienting the polar molecules to compensate for the charge imbalance on the surface of the nanostructured material. The compensation of the surface charge imbalance by the polar molecules allows the isolated regions to exhibit luminescence.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: July 15, 2014
    Inventors: Ilia N. Ivanov, Alexander A. Puretzky, Bin Zhao, David B. Geohegan, David J. Styers-Barnett, Hui Hu
  • Patent number: 8771546
    Abstract: Borate luminous material is provided, wherein, comprises the compound of following structural formula: M2(Re1-xLnx)2B2O7, wherein x is in a range of 0<x?0.5, M is alkali metal element, Ln is at least one of Tm, Tb, Eu, Sm, Pr, Dy, Ce and Bi, Re is selected from one or more element of Y, Gd, Sc, Lu and La. The preparation method of borate luminous material also is provided. The borate luminous material has the advantages of good stability, high luminescence efficiency and high color purity.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: July 8, 2014
    Assignee: Ocean's King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Chaopu Shi, Rong Wang, Wenbo Ma
  • Patent number: 8765016
    Abstract: A green luminescent material of terbium doped gadolinium borate is provided. The luminescent material has a formula of M3Gd1-xTbx(BO3)3, wherein, M is alkaline earth metal element and x is 0.005-0.5. The method for preparing the luminescent material comprises the following steps: selecting the source compounds of alkaline earth metal ion, boric acid radical ion (BO33?), Gd3+ and Tb3+ by the stoichiometric ratio, wherein, the stoichiometric ratio is the molar ratio of the corresponding element in the formula of M3Gd1-xTbx(BO3)3, and the source compound of BO33? is over 10%-30% by the molar ratio; mixing; pre-treatment by sintering; cooling; grinding; calcination; and cooling to obtain the luminescent material.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: July 1, 2014
    Assignee: Ocean's King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Xiaofang Liang, Jun Liu, Qiurong Liao
  • Patent number: 8753538
    Abstract: An oxide is provided that contains the oxide represented by Formula (I) as the main component thereof, that has a Verdet constant at a wavelength of 1.06 ?m of at least 0.18 min/(Oe·cm), and that has a transmittance at a wavelength of 1.06 ?m and for an optical length of 3 mm of at least 70%, (TbxR1-x)2O3??(I) wherein x is 0.4?x?1.0; R includes at least one element selected from the group consisting of scandium, yttrium, lanthanum, europium, gadolinium, ytterbium, holmium and lutetium.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: June 17, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shinji Makikawa, Toshiaki Watanabe, Akio Yamanaka, Hirotaka Naruse
  • Patent number: 8747696
    Abstract: Disclosed are compositions and synthetic methods of phosphors that can be efficiently excited by blue light. The wavelength of the blue light is between 400 nm to 480 nm. The phosphors contain garnet fluorescent material activated with cerium, which contain Ba, Y, Tb, Lu, Sc, La, Gd, Sm, or combinations thereof, and Al, Ga, In, or combinations thereof. In addition, the phosphors are easily and quickly prepared in a large amount. The phosphors have high thermal stability and high emission intensity, therefore, being high of value in industry for utilization.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: June 10, 2014
    Assignee: China Glaze Co., Ltd.
    Inventors: Jen-Chun Lin, Su-Ren Wang, Pei-Chun Tsai, Kuo-Ju Chen, Chun-Che Lin, Ru-Shi Liu
  • Patent number: 8747697
    Abstract: Provided herein are phosphor compositions that include a YAG phosphor that is substituted with gallium, such as YaCebAlcGadOz, wherein a, b, c, d and z are positive numbers. Also provided are solid state light emitting devices that include a YAG phosphor that is substituted with gallium.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: June 10, 2014
    Assignee: Cree, Inc.
    Inventors: David Clatterbuck, Brian Thomas Collins
  • Patent number: 8696934
    Abstract: The present invention relates to oxide luminescent materials activated by trivalent thulium and their preparations. The luminescent materials are the compounds with the following general formula: (RE1-xTmx)2O3, wherein a range of x is 0<x?0.05 and RE is one or two selected from Y, Gd, La, Lu and Sc. These materials are prepared by Sol-Gel method or high temperature solid phase method using metal oxide of Tm3+, chloride of Tm3+, nitrate of Tm3+, carbonate of Tm3+ or oxalate of Tm3+, and one or two of oxide Y3+, Gd3+, La3+, Lu3+ or Sc3+, chloride Y3+, Gd3+, La3+, Lu3+ or Sc3+, nitrate Y3+, Gd3+, La3+, Lu3+ or Sc3+, carbonate Y3+, Gd3+, La3+, Lu3+ or Sc3+ and oxalate of Y3+, Gd3+, La3+, Lu3+ or Sc3+ as raw material. The present oxide luminescent materials activated by trivalent thulium have high stability, color purity and luminous efficiency, and the methods can easily be operated.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: April 15, 2014
    Assignee: Ocean's King Lighting Science & Technology Co., Ltd.
    Inventors: Mingjie Zhou, Wenbo Ma, Zhaopu Shi
  • Patent number: 8668844
    Abstract: The invention relates to a Gd2O2S:Nd fluorescent material and the use of Nd3+ as emitter in suitable materials.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: March 11, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Cornelis Reinder Ronda, Guenter Zeitler, Herbert Schreinemacher, Norbert Conrads, Detlef Uwe Wiechert
  • Patent number: 8668843
    Abstract: An M-C—N—O based phosphor including a group IIIB element (M), carbon (C), nitrogen (O), wherein an amount of the group IIIB element (M) contained is 1%<(M)<50% by mass, an amount of carbon (C) contained is 0.005%<(C)<10% by mass, an amount of nitrogen (N) contained is 1%<(N)<60% by mass, an amount of oxygen (O) contained is 1%<(O)<75% by mass, and (M)+(C)+(N)+(O)=100% by mass. Colors of the M-C—N—O based phosphor can be changed by adjusting a peak top of an emission spectrum. Highly environmentally-compatible polymer dispersions, inorganic EL devices, light emitting devices, fluorescent tubes, and the like are also provided, which use the M-C—N—O based phosphors.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: March 11, 2014
    Assignees: Hiroshima University, Kuraray Co., Ltd.
    Inventors: Kikuo Okuyama, Akihiro Yabuki, Ferry Iskandar, Takashi Ogi, Jun Takai, Hideharu Iwasaki
  • Patent number: 8652356
    Abstract: The blue phosphor of the present invention is represented by the general formula aBaO.bSrO.(1?a?b)EuO.cMgO.dAlO3/2.eWO3, where 0.70?a?0.95, 0?b?0.15, 0.95?c?1.15, 9.00?d?11.00, 0.001?e?0.200, and a+b?0.97 are satisfied. In the blue phosphor of the present invention, two peaks whose tops are located in a range of diffraction angle 2?=13.0 to 13.6 degrees and one peak whose top is located in a range of diffraction angle 2?=14.6 to 14.8 degrees are present in an X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 ?.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: February 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Kojiro Okuyama, Yayoi Okui, Seigo Shiraishi
  • Patent number: 8636921
    Abstract: Disclosed is a phosphor having a formula of M3-2xM?x(M?1-y-zPryGdz)(PO4)2. M is Li, Na, K, or combinations thereof. M? is Ca, Sr, Ba, Mg, Zn, or combinations thereof. M? is Sc, Y, La, Lu, Al, Ga, In, or combinations thereof. 0?x?1, 0<y?0.15, 0<z?0.7. The phosphor can be collocated with an excitation light source to construct a UV light-emitting device, wherein the excitation light source emits light with a wavelength of 140 nm to 240 nm.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: January 28, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Yi-Chen Chiu, Yao-Tsung Yeh, Shyue-Ming Jang, Chien-Hao Huang, Teng-Ming Chen, Kang-Ling Shih, Yen-Ying Kung
  • Publication number: 20140021411
    Abstract: The present invention aims to provide a thermoluminescent phosphor for obtaining a two-dimensional or three-dimensional dosimeter for measuring dose absorbed by biological tissues, the thermoluminescent phosphor exerting superior handleability, exhibiting superior biological tissue equivalence, and having superior precision. The aforementioned object is achieved by means of a method for producing a thermoluminescent phosphor, the method comprising a step A1 for mixing lithium tetraborate, boron oxide and manganese dioxide, a step A2 for firing the aforementioned mixture at 770 to 840° C., and a step A3 for obtaining the thermoluminescent phosphor comprising lithium triborate as a base material and manganese as a luminescent center present in the base material by further adding and mixing lithium tetraborate into the aforementioned fired product and then firing the mixture at 770 to 840° C.
    Type: Application
    Filed: March 19, 2012
    Publication date: January 23, 2014
    Applicant: RIKKYO GAKUIN
    Inventors: Akio Urushiyama, Yuji Tomizawa
  • Patent number: 8608978
    Abstract: The present invention relates to a ceramic composite light-converting member which is a solidified body having a texture of at least two or more oxide phases being continuously and three-dimensionally entangled with each other, where at least one of the oxide phases is a fluorescence-emitting phase and the composition as a whole is represented by: x.AlO3/2-y.(a.YO3/2-b.GdO3/2-c.CeO2) [wherein x, y, a, b and c are each a molar fraction and satisfy 0.750<x<0.850, 0<b<0.8, 0<c<0.3, x+y=1 and a+b+c=1]; or x.AlO3/2-y.(a.YO3/2-c.CeO2) (wherein x, y, a, b and c are each a molar fraction and satisfy 0.750<x<0.850, 0.125?c<0.3, x+y=1 and a+c=1). The ceramic composite light-converting member enables emitting light adjusted to a peak wavelength of 540 to 580 nm and fabricating a high-efficiency white light-emitting device by combining it with a blue light-emitting element.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: December 17, 2013
    Assignee: Ube Industries, Ltd.
    Inventors: Atsuyuki Mitani, Shin-ichi Sakata
  • Publication number: 20130327985
    Abstract: A ceramic composite for light conversion comprising a solidified body in which crystalline phases of oxides are three-dimensionally entangled and a method for manufacture thereof. A manufacture method of a ceramic composite for light conversion is characterized in that a polishing step is provided in a chemical mechanical polishing (CMP) process applied to the surface of a solidified body with a structure in which an Al2O3 phase and other phases are three-dimensionally entangled.
    Type: Application
    Filed: December 2, 2011
    Publication date: December 12, 2013
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Dai Inamori, Takafumi Kawano, Toshiro Doi, Syuhei Kurokawa
  • Patent number: 8597544
    Abstract: A compound for non-linear optics for use at 350 nm and below. The compound includes a material for non-linear optics comprising AxM(1-x)Al3B4O12. x is larger than or equal to zero and smaller than or equal to 0.1, A is selected from a group consisting of Sc, Y, La, Yb, and Lu, and M is selected from a group consisting of Sc, Y, La, Yb, and Lu. The compound is free from a molybdenum bearing impurity of at least 1000 parts per million.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: December 3, 2013
    Assignee: Deep Photonics Corporation
    Inventor: Theodore Alekel
  • Publication number: 20130313479
    Abstract: A composition comprising an inorganic core and an aluminate shell is described. The aluminate can have the formula (1): (CeaTbb)Mg1+xAl11+yO19+x+y ??(1), where a, b, x and y comply with the relations a+b=1?0.2?x?+0.2 and ?0.2?y?+0.2, wherein the shell uniformly covers the inorganic core over a thickness of no less than 300 nm. A phosphor is also described that can be obtained by calcinating the composition at a temperature of at least 1200° C.
    Type: Application
    Filed: November 10, 2011
    Publication date: November 28, 2013
    Applicant: Rhodia Operations
    Inventors: Valérie Buissette, Thierry Le-Mercier, Franck Aurissergues
  • Publication number: 20130306912
    Abstract: Provided are an yttrium aluminum garnet (YAG) phosphor, YAG phosphor particles, and methods of fabricating the same. The method of fabricating an yttrium aluminum garnet (YAG) phosphor involves: dispersing aluminum hydroxide core particles in an aqueous solution comprising yttrium, urea, and a lanthanide element to form a shell on the aluminum hydroxide core particles; and calcining the aluminum hydroxide core particles with the shell formed thereon to obtain hollow YAG particles, in which the shell includes a compound of yttrium and a lanthanide element.
    Type: Application
    Filed: May 16, 2013
    Publication date: November 21, 2013
    Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Hyun Suk JUNG, Min Jeong KIM, Eun Sang YOO
  • Patent number: 8585928
    Abstract: A family of rare-earth Group 5 oxides, where the Group 5 oxide is a niobate or tantalate. The rare-earth Group 5 oxides can be doped with suitable emitter ions to form nanophosphors.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: November 19, 2013
    Assignee: Sandia Corporation
    Inventors: May D. Nyman, Lauren E. S. Rohwer
  • Patent number: 8580150
    Abstract: Submicronic barium and magnesium aluminates, useful as phosphors, are in the form of a liquid-phase suspension of substantially monocrystalline particles having an average particle size ranging from 80 to 400 nm; such aluminates are prepared by a process that includes: providing a liquid mixture containing compounds of aluminum and of other elements that are part of the aluminate composition; drying the mixture by atomization; calcining the dried product in a reducing atmosphere and wet-grinding this product.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: November 12, 2013
    Assignee: Rhodia Operations
    Inventors: Valérie Buissette, Thierry Le-Mercier, Laurent Thiers, Yvan Montardi, Olivier Le-Roux
  • Patent number: 8580148
    Abstract: It is an object of the present invention to provide an alkaline earth metal aluminate phosphor having good heat resistance and durability against vacuum ultraviolet rays and ultraviolet rays, among others, and a method of producing the same. An alkaline earth metal aluminate phosphor containing bivalent europium as an activator, which contains at least one element (e) selected from the group consisting of indium, tungsten, niobium, bismuth, molybdenum, tantalum, thallium and lead.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: November 12, 2013
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Seiko Hirayama, Keita Kobayashi, Junya Ishii, Mizuho Wada, Shinji Nakahara
  • Patent number: 8574458
    Abstract: The invention relates to an inorganic scintillator material of formula Lu(2-y)Y(y-z-x)CexMzSi(1-v)M?vO5, in which: M represents a divalent alkaline earth metal and M? represents a trivalent metal, (z+v) being greater than or equal to 0.0001 and less than or equal to 0.2; z being greater than or equal to 0 and less than or equal to 0.2; v being greater than or equal to 0 and less than or equal to 0.2; x being greater than or equal to 0.0001 and less than 0.1; and y ranging from (x+z) to 1. In particular, this material may equip scintillation detectors for applications in industry, for the medical field (scanners) and/or for detection in oil drilling. The presence of Ca in the crystal reduces the afterglow, while stopping power for high-energy radiation remains high.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: November 5, 2013
    Assignee: Saint-Gobain Cristaux et Detecteurs
    Inventors: Bernard Ferrand, Bruno Viana, Ludivine Pidol, Pieter Dorenbos