Inorganic Luminescent Compositions Patents (Class 252/301.4R)
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Publication number: 20130277613Abstract: A method and apparatus for sintering flat ceramics using a mesh or lattice is described herein.Type: ApplicationFiled: April 18, 2013Publication date: October 24, 2013Applicant: NITTO DENKO CORPORATIONInventors: Hiroaki Miyagawa, Guang Pan, Hironaka Fujii, Bin Zhang, Amane Mochizuki, Toshitaka Nakamura
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Patent number: 8551362Abstract: A light-emitting device is produced using a phosphor composition containing a phosphor host having as a main component a composition represented by a composition formula: aM3N2.bAlN.cSi3N4, where “M” is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, and “a”, “b”, and “c” are numerical values satisfying 0.2?a/(a+b)?0.95, 0.05?b/(b+c)?0.8, and 0.4?c/(c+a)?0.95. This enables a light-emitting device emitting white light and satisfying both a high color rendering property and a high luminous flux to be provided.Type: GrantFiled: March 18, 2013Date of Patent: October 8, 2013Assignee: Panasonic CorporationInventor: Shozo Oshio
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Publication number: 20130256599Abstract: The present invention relates to a ceramics composite including: a matrix phase including Al2O3 or a substance in which one selected from Sc2O3 and Ga2O3 is incorporated into Al2O3; a main phosphor phase formed in the matrix phase and including a substance represented by a general formula A3B5O12:Ce in which A is at least one selected from Y, Gd, Tb, Yb and Lu and B is at least one selected from Al, Ga and Sc; and a CeAl11O18 phase mixed in the matrix phase and the main phosphor phase.Type: ApplicationFiled: February 7, 2013Publication date: October 3, 2013Applicant: COVALENT MATERIALS CORPORATIONInventor: Masaki IRIE
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Publication number: 20130256600Abstract: An oxide ceramic fluorescent material is provided comprising a polycrystalline ceramic sintered body of Y3Al5O12, Lu3Al5O12, (Y, Lu)3Al5O12, (Y, Gd)3Al5O12, or Al2O3 in which a rare earth element selected from Ce, Eu and Tb has been diffused from its surface as fluorescent activator. The concentration of the rare earth element is 1 wt % at a depth of 50-600 ?m as measured from the sintered body surface and at least 1 wt % at any position nearer to the sintered body surface.Type: ApplicationFiled: March 22, 2013Publication date: October 3, 2013Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Toshihiro Tsumori, Kazuhiro Wataya
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Patent number: 8545723Abstract: A persistent phosphor of formula I is provided, along with methods for making and using the phosphor: AxAlyO4:Euj, REk, Bm, Znn, Coo, Scp ??I wherein: A is Ba, Sr, Ca, or a combination of these metals; x is greater than about 0.75 and less than about 1.3; y is greater than or equal to about 1.6 and less than or equal to 2; j is greater than about 0.0005 and less than about 0.1; k is greater than about 0.0005 and less than about 0.1; m is greater than or equal to 0 and less than about 0.30; n is greater than 0 and less than about 0.10; o is greater than 0 and less than about 0.01; p is greater than 0 and less than about 0.05; and RE is Dy, Nd, or a combination thereof. Applications for such phosphors include use in toys, emergency equipment, clothing, and instrument panels, among others.Type: GrantFiled: March 30, 2011Date of Patent: October 1, 2013Assignee: General Electric CompanyInventors: Holly Ann Comanzo, Alok Mani Srivastava, William Winder Beers, Sergio Martins Loureiro, Anant Achyut Setlur, Stanley John Stoklosa, Claire Susan Henderson
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Publication number: 20130248764Abstract: The invention relates to a method of making Ce3+ containing laser materials with a fast cooling rate.Type: ApplicationFiled: December 2, 2011Publication date: September 26, 2013Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Ulrich Weichmann, Matthias Alexander Wilhelm Fechner, Fabian Reichert, Herbert Walter Klaus Petermann, Gunter Huber
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Publication number: 20130240787Abstract: A method of making a nanocrystal includes slowly infusing a M-containing compound and a X donor into a mixture including a nanocrystal core, thereby forming an overcoating including M and X on the core.Type: ApplicationFiled: March 15, 2012Publication date: September 19, 2013Inventors: Ou Chen, Moungi G. Bawendi
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Patent number: 8529791Abstract: 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: GrantFiled: July 12, 2011Date of Patent: September 10, 2013Assignee: Intematix CorporationInventors: Yusong Wu, Dejie Tao, Shifan Cheng, Yi-Qun Li
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Publication number: 20130207040Abstract: The present invention relates to long decay phosphors comprising rare earth activated strontium aluminates and methods for producing them. The phosphors comprise a matrix of the formula Sr4Al14O25 comprising europium as an activator and a further rare earth element as a co-activator, wherein the molar ratio of Al/Sr in the starting materials is in the range of 3.1 to less than 3.5 and the ratio of Eu/Sr is in the range of 0.0015 to 0.01. The process for the preparation of a phosphor comprises the steps of milling the starting materials for the synthesis of the phosphor, the starting materials comprising a boron compound selected from boric acid, boric oxide or a borate salt in an amount such that the B/Sr molar ratio is between 0.1 and to 0.3, treating the milled composition with heat, grinding the block material which is obtained through the heat treatment, ball-milling the crushed material, sieving the material, and washing the material with an aqueous solution.Type: ApplicationFiled: February 5, 2013Publication date: August 15, 2013Applicant: ROLEX SAInventor: Rolex SA
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Patent number: 8506843Abstract: This disclosure features a persistent phosphor having the following formula I: Sra,Cab,BacAl2-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??I where a and b each range from about 0.3 to about 0.7; c is between about 0 and about 0.1; 0.75?a+b+c+y+z?1.3; y is between about 0.0005 and about 0.1; RE is any rare earth element alone or in combination; z is between about 0.0005 and about 0.15; m is between about 0.0005 and about 0.30; n is between about 0 and about 0.10; o is between about 0 and about 0.01; p is between about 0 and about 0.10 and d ranges from about 3.945 to about 4.075. Once the persistent phosphor has been excited it appears white in an absence of ambient light. Also featured is an article of manufacture that includes the phosphor.Type: GrantFiled: December 17, 2010Date of Patent: August 13, 2013Assignee: General Electric CompanyInventors: Alok Srivastava, Holly Ann Comanzo, Sam Camardello, William W. Beers
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Patent number: 8496852Abstract: The invention relates to a phosphor in a polycrystalline ceramic structure and a light-emitting element provided with the same comprising a Light-Emitting Diode (LED) in which a composite structure of phosphor particles is embedded in a matrix, characterized in that the matrix is a ceramic composite structure comprising a polycrystalline ceramic alumina material, hereafter called luminescent ceramic matrix composite. This luminescent ceramic matrix composite can be made by the steps of converting a powder mixture of ceramic phosphor particles and alumina particles into a slurry, shaping the slurry into a compact, and applying a thermal treatment, optionally in combination with hot isostatic pressing into a polycrystalline phosphor-containing ceramic alumina composite structure.Type: GrantFiled: December 17, 2010Date of Patent: July 30, 2013Assignee: Philips Koninklijke N.V.Inventors: Jan De Graaf, Theo Arnold Kop
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Patent number: 8486299Abstract: The invention provides phosphors composed of Eu(1-x-w)MaxMbwMgMc10O17, wherein Ma is Yb, Sn, Ce, Tb, Dy, or combinations thereof, and 0<x<0.5, Mb is Ca, Sr, Ba, or combinations thereof, and 0?w?0.5, and Mc is Al, Ga, Sc, In, or combinations thereof. The blue phosphors emit blue light under the excitation of ultraviolet light or blue light, and the phosphors may be further collocated with different colored phosphors to provide a white light illumination device. The blue phosphors of the invention can efficiently utilize light in solar cells.Type: GrantFiled: July 21, 2010Date of Patent: July 16, 2013Assignee: Industrial Technology Research InstituteInventors: Tien-Heng Huang, Fang-Ching Chang, Yao-Tsung Yeh, Shian-Jy Wang
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Patent number: 8475683Abstract: Disclosed herein are yellow-green and yellow-emitting aluminate based phosphors for use in white LEDs, general lighting, and LED and backlighting displays. In one embodiment of the present invention, the cerium-activated, yellow-green to yellow-emitting aluminate phosphor comprises the rare earth lutetium, at least one alkaline earth metal, aluminum, oxygen, at least one halogen, and at least one rare earth element other than lutetium, wherein the phosphor is configured to absorb excitation radiation having a wavelength ranging from about 380 nm to about 480 nm, and to emit light having a peak emission wavelength ranging from about 550 nm to about 600 nm.Type: GrantFiled: March 8, 2012Date of Patent: July 2, 2013Assignee: Intematix CorporationInventors: Yi-Qun Li, Jingtao Gu, Zhankun Jia, Shifan Cheng
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Publication number: 20130161560Abstract: 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: ApplicationFiled: September 2, 2011Publication date: June 27, 2013Applicant: RIKKYO GAKUINInventors: Akio Urushiyama, Yuji Tomizawa
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Patent number: 8470200Abstract: The present invention provides a production process for the production of an MAl2O4:Eu type long-lasting phosphor (M representing an alkaline earth metal). The process includes the steps of mixing a BAM (alkaline earth aluminate) phosphor with an alkaline earth compound and calcinating the resulting mixture.Type: GrantFiled: July 13, 2009Date of Patent: June 25, 2013Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yuji Kimura, Yasushi Takai, Hirofumi Kawazoe
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Patent number: 8470201Abstract: An oxide phosphor that is highly durable and produces visible light when excited by exposure to near-ultraviolet excitation light, comprising an oxide having the composition represented by the formula (Al2O3)x.(SiO2)1-x, where 0<x<1, and an activating element M.Type: GrantFiled: June 14, 2012Date of Patent: June 25, 2013Assignee: Shibaura Institute of TechnologyInventor: Masato Ota
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Publication number: 20130153824Abstract: Provided is a silicon nitride powder for siliconitride phosphor having high luminance, a Sr3Al3Si13O2N21 phosphor and a ?-Sialon phosphor using the powder, which can be used for vacuum fluorescent displays (VFDs), field emission displays (FEDs), plasma display panels (PDPs), cathode ray tubes (CRTs), light emitting diodes (LEDs), or the like, and processes for producing these phosphors. The silicon nitride powder for the siliconitride phosphors is a crystalline silicon nitride powder for use as a raw material for producing siliconitride phosphors including a silicon element, a nitrogen element, and an oxygen element, and has an average particle diameter of 1.0 to 12 ?m and an oxygen content of 0.2 to 0.9% by weight.Type: ApplicationFiled: July 29, 2011Publication date: June 20, 2013Applicant: UBE INDUSTRIES LTD.Inventors: Masataka Fujinaga, Takuma Sakai, Shinsuke Jida
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Publication number: 20130153823Abstract: A rare earth-aluminium/gallate based fluorescent material and manufacturing method thereof are provided. Said rare earth-aluminium/gallate based fluorescent material comprises a core, and a shell which coats said core, wherein said core is a metal nanoparticle, and said shell is a fluorescent powder of chemical formula (Y1-xCex)3(Al1-yGay)5O12, 0<x?0.5, 0?y?1.0. Said rare earth-aluminium/gallate based fluorescent material has a uniform particle size distribution, a stable structure, a high luminous efficiency and a high luminous strength. The manufacturing method has the following properties: a simple technique, a low demand for equipments, no pollution, easily controllable reactions, material shapes and particle sizes, and being suitable for industrial manufacture.Type: ApplicationFiled: April 30, 2010Publication date: June 20, 2013Inventors: Mingjie Zhou, Jun Liu, Wenbo Ma
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Publication number: 20130153825Abstract: A luminescent material, containing yttrium oxide, oxides of rare-earth metals, as well as aluminium, gallium and indium oxides in a ratio that produces compounds corresponding to the general formula: [(Y1-x-y-zCex?(Ln-1)y?(Ln-2)z]3-?(Al1-p-qGapInq)5O12-1.5? where ? is a value varying within the 0.20???2.80 range; x is cerium atomic fraction, varying in the 0.001<x<0.15 range; ?(Ln-1)y is one or several lanthanides of the Gd, Tb, La, Lu and Sm, which—together with yttrium and cerium—form the basis of the “Cation” sub-lattice, and 0?y?0.90. ?(Ln-2)z is one or several lanthanides of the Pr, Nd, Eu, Dy, Ho, Tm, Er and Yb group. They are dopants introduced into the ‘cation’ sub-lattice at a rate of 0.0001<z<0.01; also x, y and z were selected in such a fashion that 1-x-y-z>0; p and q are atomic fractions of Ga and In in the aluminium sub-lattice. Their ranges are: 0<p<0.3 and 0<q<0.3.Type: ApplicationFiled: October 22, 2010Publication date: June 20, 2013Inventors: Anatoly Vasilyevich Vishnyakov, Yaohui Chang, Ekaterina Analtolyevna Vishniakova
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Publication number: 20130140492Abstract: Borate luminescent materials, preparation methods and uses thereof are provided. The luminescent materials are represented by the general formula: (In1-xRex)BO3:zM, 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: ApplicationFiled: August 19, 2010Publication date: June 6, 2013Inventors: Mingjie Zhou, Jun Liu, Wenbo Ma
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Publication number: 20130105735Abstract: A process is disclosed for the production of persistent phosphors, comprising exposing particles of phosphor precursors for a short time to a heat source selected from a particle plasma and an open flame arising from the combustion of hydrocarbons. A process for coating a substrate with persistent phosphors is also disclosed, comprising directing a stream of phosphor precursor particles for a short time through the same types of heat source toward the substrate. Preferred phosphors are Strontium Aluminate-based doped with Dysprosium and Europium.Type: ApplicationFiled: October 27, 2011Publication date: May 2, 2013Inventors: Willard Scott Rader, Robert William Hepburn
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Publication number: 20130105736Abstract: The invention relates to an converter material for solar cells using Sm2+.Type: ApplicationFiled: July 5, 2011Publication date: May 2, 2013Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Cornelis Reinder Ronda, Dirk Kornelis Gerhardus De Boer, Andries Meijerink, Nikolaos Christogiannis, Danielle Beelen, Wilhelmus Cornelis Keur
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Patent number: 8431042Abstract: In an embodiment, a solid state scintillator material includes a composition represented by a general formula: (Gd1-?-?-?TB?Lu?Ce?)3(Al1-xGax)aOb, where ? and ? are numbers satisfying 0<??0.5, 0<??0.5, and ?+??0.85, ? is a number satisfying 0.0001???0.1, x is a number satisfying 0<x<1, a is a number satisfying 4.8?a?5.2 and b is a number satisfying 11.6?b?12.4 (atomic ratio), and a garnet structure.Type: GrantFiled: February 21, 2012Date of Patent: April 30, 2013Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Yukihiro Fukuta, Takao Sawa, Makoto Hayashi
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Publication number: 20130099162Abstract: A borate based red light emitting material is provided, which comprises a core and a shell covering the said core. Said core is nanometer metal particle, and the shell is fluorescent powder having the chemical formula of (Y1-x-yEuxGdy)BO3, wherein 0<x?0.3, 0?y?0.7. The material has the advantages of uniform particle size, structure stability, excellent luminous intensity and luminous efficiency. The preparation method has a simple process, low demand on equipment and no pollution. The method is easily controllable for the reaction, material morphology and particle size, and suitable for industrial production.Type: ApplicationFiled: April 30, 2010Publication date: April 25, 2013Applicant: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO.,LTDInventors: Mingjie Zhou, Jun Liu, Wenbo Ma
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Publication number: 20130082208Abstract: 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: ApplicationFiled: June 17, 2010Publication date: April 4, 2013Applicant: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO., LTD.Inventors: Mingjie Zhou, Jun Liui, Wenbo Ma
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Publication number: 20130082207Abstract: In accordance with one aspect of the present invention, a core?shell phosphor composition is provided that includes a core comprising magnesium oxide; and a shell at least partially enclosing the core, wherein the shell comprises a shell material having formula (I) (Y1?xEux)2O3 ??(I) wherein, 0<x<0.95. In accordance to another aspect of the invention a method of making the core?shell phosphor and a light source including the core?shell phosphor are provided.Type: ApplicationFiled: September 29, 2011Publication date: April 4, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Alok Mani Srivastava, Holly Ann Comanzo, Samuel Joseph Camardello, Florencio Garcia
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Patent number: 8409471Abstract: A green phosphor including a compound represented by Formula 1 (Y3-xMx) (Al5-yM?y)O12:Cez and a pigment. The green phosphor having the compound represented by Formula 1 and a pigment has a shorter decay time than conventional phosphors, and thereby confers excellent luminescence characteristics and color purity. A display panel including the green phosphor 1 is also provided herein.Type: GrantFiled: August 12, 2010Date of Patent: April 2, 2013Assignee: Samsung SDI Co., Ltd.Inventors: Yu-Mi Song, Jay-Hyok Song, Ick-Kyu Choi, Young-Hun Lee, Young-Ki Kim, Mi-Ran Song, Do-Hyung Park, Yoon-Chang Kim, Young-Kwan Kim, Soon-Rewl Lee, Dong-Sik Zang
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Publication number: 20130075660Abstract: Disclosed is a phosphor and a method for preparing the same. The phosphor comprises a material having a general composition formula expressed by M1Si6N8?xOx (satisfying 0?x?1), where M is alkaline earth metal.Type: ApplicationFiled: September 23, 2011Publication date: March 28, 2013Applicant: Epistar CorporationInventors: Chiao-Wen YEH, Ru-Shi Liu
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Patent number: 8404153Abstract: This disclosure features a blend, or use together in at least two layers of an article of manufacture, of a first persistent phosphor, a second persistent phosphor and a third phosphor. The first persistent phosphor has a formula I: Cax-y-z-aAaAl2-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??I where the variables are defined in the disclosure. The second persistent phosphor has a formula II: Srx-y-z-aAaAl14-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp??II where the variables are defined in the disclosure. The third phosphor is a non-persistent phosphor that is excited at a wavelength in a range of 300-500 nm. Also featured is an article of manufacture including the blend or the phosphors present in at least two layers. Once the blend or layered structure comprising the three phosphors has been excited it can appear white in an absence of ambient light.Type: GrantFiled: December 17, 2010Date of Patent: March 26, 2013Assignee: General Electric CompanyInventors: Holly Ann Comanzo, Alok Srivastava, William W. Beers
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Publication number: 20130062562Abstract: An aluminate-based fluorescent powder coated by metal nanoparticles. The formula thereof is (Y1-xTbx)3(Al1-yGay)5O12@zM, in which 0<x?1.0, 0?y?1.0, @ means coating, M is metal nanoparticles, z is mole ratio of metal nanoparticles to aluminate-based fluorescent powder and 0<z?0.01. A method for producing the aluminate-based fluorescent powder coated by metal nanoparticles is also provided.Type: ApplicationFiled: May 25, 2010Publication date: March 14, 2013Inventors: Mingjie Zhou, Jun Liu, Wenbo Ma
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Publication number: 20130062561Abstract: A phosphor is represented by below formula: AaBbCcDdEe:Mm wherein, M represents at least one activator selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and combinations thereof; A represents at least one element selected from Ca2+, Sr2+, Ba2+ and combinations thereof; B represents C4+, Si4+ or Ge4+; C represents B3+, Al3+ or Ga3+; D and E each independently represent at least one element selected from N, O, F and combinations thereof; m+a=2; 0.00001?m?0.1; 0.5?b+c?8; and 0.5?d+e?10. The phosphor has a color render index of greater than 50 and is suitable to be applied in a white LED to improve the color rendering property of the white light. A method of preparing the phosphor is also provided.Type: ApplicationFiled: September 9, 2011Publication date: March 14, 2013Applicant: EPISTAR CORPORATIONInventors: Wei-Ting Chen, Ru-Shi Liu, Chien-Yuan Wang
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Patent number: 8388862Abstract: InGaN-based blue LEDs and, specifically luminescent materials, are described containing yttrium oxide, oxides of rare earth metals, as well as aluminium oxide in proportions that yield a luminescent material whose average composition fits the general formula (Y1?x?yCex?Lny)3+?Al5O12+1.5?, where ?—defines increase in stoichiometric index over the known value for yttrium-gadolinium garnet and varies between 0.033 and 2; x—is atomic fraction of cerium, 0.0001-0.1; ?Lny —is one or more lanthanides from the Gd, Tb, La, Yb group, whose atomic fraction in an yttrium sub-lattice is 0.01<Gd<0.70; 0.001<Tb<0.2; 0.001<La<0.1; 0.001<Yb<0.1, respectively, while the difference for all the compositions [1?x?y]>0.Type: GrantFiled: July 28, 2009Date of Patent: March 5, 2013Inventors: Anatoly Vasilyevich Vishnyakov, Dmitry Juryevich Sokolov
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Publication number: 20130043430Abstract: A polycrystalline scintillator for detecting soft X-rays, which comprises Ce as a light-emitting element and at least Y, Gd, Al, Ga and O, and has a garnet crystal structure, and a composition represented by the general formula of (Y1?x?zGdxCez)3+a(Al1?uGau)5?aO12, wherein 0?a?0.1, 0.15?x?0.3, 0.002?z?0.015, and 0.35?u?0.55, with 0.05-1 ppm by mass of Fe and 0.5-10 ppm by mass of Si by outer percentage, a ratio ?50/?100 of 3 or more, wherein ?50 is an absorption coefficient of X-rays at 50 keV, and ?100 is an absorption coefficient of X-rays at 100 keV, and afterglow of 800 ppm or less after 3 ms from the termination of X-ray irradiation.Type: ApplicationFiled: October 25, 2011Publication date: February 21, 2013Applicant: HITACHI METALS, LTD.Inventors: Ryouhei Nakamura, Kenya Tanaka, Shunsuke Ueda
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Patent number: 8377333Abstract: A semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with an improved photoluminescence quantum efficiency. Also disclosed are populations of semiconductor nanocrystals, compositions and devices including a semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. In one embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%.Type: GrantFiled: May 21, 2009Date of Patent: February 19, 2013Assignee: QD Vision, Inc.Inventors: Dorai Ramprasad, Craig Breen, Jonathan S. Steckel
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Publication number: 20130037747Abstract: Aluminate fluorescent materials and preparation methods thereof are provided. The fluorescent materials include a core and a shell coating the core. The core is metal nano particle, the shell is fluorescent powder represented by the following chemical formula: (Ce1-xTbx)MgAl11O19, wherein 0<x?0.7. The aluminate fluorescent materials with high luminous efficiency are not only uniform in the aspect of particle size distribution, but also are stable in the aspect of structure. The preparation methods which have simple technique and low pollution are appropriate to be used in industry.Type: ApplicationFiled: April 30, 2010Publication date: February 14, 2013Applicant: OCEAN'S KING LIGHTING SCIENCE & TECHNOLOGY CO.,LTDInventors: Mingjie Zhou, Jun Liu, Wenbo Ma
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Patent number: 8361347Abstract: The blue phosphor of the present invention includes ZrO2 and a metal aluminate that 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. This blue phosphor has a ZrO2 content of 0.01 to 1.00% by weight. 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 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: GrantFiled: July 3, 2009Date of Patent: January 29, 2013Assignee: Panasonic CorporationInventors: Kojiro Okuyama, Yayoi Okui, Seigo Shiraishi
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Publication number: 20130015402Abstract: 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: ApplicationFiled: April 23, 2010Publication date: January 17, 2013Inventors: Mingjie Zhou, Wenbo Ma, Ting Lv
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Publication number: 20130009097Abstract: An oxynitride phosphor and a method of manufacturing the same are revealed. The formula of the oxynitride phosphor is Ba3-xSi6O12N2: Yx (0?x?1). Y is praseodymium (Pr) or terbium (Tb) used as a luminescent center. The oxynitride phosphor is synthesized by solid-state reaction. The oxynitride phosphor is excited by vacuum ultraviolet light with a wavelength range of 130 nm to 300 nm or ultraviolet to visible light with a wavelength range of 300 nm to 550 nm to emit light with a wavelength range of 400 nm to 700 nm. Moreover, the full-width at half-maximum of the emission spectrum is smaller than 30 nm. Thus the oxynitride phosphor is suitable for applications of backlights, plasma display panels and ultraviolet excitation. The oxynitride phosphor has higher application value.Type: ApplicationFiled: July 5, 2012Publication date: January 10, 2013Applicant: FORMOSA EPITAXY INCORPORATIONInventors: CHENG-I CHU, RU-SHI LIU, YU-CHIH LIN, CHEN-HONG LEE, WEI-KANG CHENG, YI-SHENG TING, SHYI-MING PAN
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Publication number: 20130001470Abstract: A luminescent particle includes an interior portion of the luminescent particle comprising a luminescent compound that reacts with atmospherically present components and a passivating layer on an outer surface of the luminescent particle that is operable to inhibit the reaction between the luminescent compound and the atmospherically present components.Type: ApplicationFiled: September 12, 2012Publication date: January 3, 2013Applicant: Cree, Inc.Inventors: Brian Thomas Collins, Jesse Colin Reiherzer, Florin A. Tudorica
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Patent number: 8343379Abstract: The invention discloses a red phosphor powder which is based on strontium (Sr) aluminate and using europium (Eu) as exciting agent, and is characterized by that its chemical equivalence formula is (SrO)4(?Me+2O)1Al2O3: Eu, wherein Me+2=Mg and/or Ca and/or Ba. The present invention also discloses a manufacturing process for the red phosphor powder and a warm white light-emitting diode employing the phosphor powder. Moreover, the present invention also discloses a multi-layer polyethylene thin film using the red phosphor powder.Type: GrantFiled: June 3, 2009Date of Patent: January 1, 2013Assignees: Wei-Hung Lo, Chien-Yi ChenInventors: Soshchin Naum, Wei-Hung Lo, Chi-Ruei Tsai
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Publication number: 20120326086Abstract: A compound is provided containing silicon, aluminum, strontium, europium, nitrogen, and oxygen is used that enables a red phosphor having strong luminous intensity and high luminance to be obtained, and that enables the color gamut of a white LED to be increased with the use of the red phosphor. The red phosphor contains an element A, europium, silicon, aluminum, oxygen, and nitrogen at the atom number ratio of the following formula: [A(m-x)Eux]Si9AlyOnN[12+y-2(n-m)/3]. The element A in the formula is at least one of magnesium, calcium, strontium, and barium, and m, x, y, and n in the formula satisfy the relations 3<m<5, 0<x<1, 0<y<2, and 0<n<10.Type: ApplicationFiled: March 21, 2012Publication date: December 27, 2012Applicant: SONY CORPORATIONInventors: Hiraku Akiho, Tsuneo Kusunoki, Takahiro Igarashi, Takamasa Izawa
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Patent number: 8337720Abstract: Embodiments of the invention involve semiconductor nanoparticle capping ligands, their production and use. Ligands may have the formula with m ranging from approximately 8 to approximately 45. An embodiment provides a method of forming a compound of the formula including the steps of providing a first starting material comprising poly(ethyleneglycol) and reacting the first starting material with a second starting material comprising a functional group for chelating to the surface of a nanoparticle to thereby form the compound.Type: GrantFiled: February 25, 2009Date of Patent: December 25, 2012Assignee: Nanoco Technologies, Ltd.Inventors: Mark C. McCairn, Steven M. Daniels, Siobhan Cummins, Nigel Pickett
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Publication number: 20120319049Abstract: 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: ApplicationFiled: February 10, 2011Publication date: December 20, 2012Inventors: Zhengwei Pan, Feng Liu, Xufan Li
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Patent number: 8323528Abstract: Compositions, methods of making compositions, materials including compositions, crayons including compositions, paint including compositions, ink including compositions, waxes including compositions, polymers including compositions, vesicles including the compositions, methods of making each, and the like are disclosed.Type: GrantFiled: April 2, 2008Date of Patent: December 4, 2012Assignee: University of Georgia Research Foundation, Inc.Inventors: Weiyi Jia, Xiaojun Wang, William Yen, Laurel C. Yen, legal representative, George D. Jia
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Patent number: 8318044Abstract: 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: GrantFiled: June 25, 2009Date of Patent: November 27, 2012Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung-Hoon Lee, Gundula Roth, Walter Tews
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Publication number: 20120286206Abstract: 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: ApplicationFiled: February 26, 2010Publication date: November 15, 2012Inventors: Mingjie Zhou, Xiaofang Liang, Jun Liu, Qiurong Liao
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Patent number: 8308980Abstract: 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: GrantFiled: June 25, 2009Date of Patent: November 13, 2012Assignee: Seoul Semiconductor Co., Ltd.Inventors: Chung Hoon Lee, Gundula Roth, Walter Tews
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Patent number: 8303846Abstract: It is an object of the present invention to provide an infra-red light emitting phosphor having an excellent chemical stability and desirable light emitting properties. The infra-red light emitting phosphor is represented by a chemical formula: (A1-x-yNdxYby)VO4, wherein A represents at least one element selected from yttrium (Y), gadolinium (Gd), lutetium (Lu) and lanthanum (La); x and y respectively satisfy the requirements: 0.01?x?0.3 and 0.01?y?0.4, provided that (x+y)?0.5 and 0.2?(y/x)?6. This vanadate phosphor having the constitution described above can act as an infra-red light emitting phosphor having an excellent chemical stability and desirable light emitting properties.Type: GrantFiled: March 27, 2006Date of Patent: November 6, 2012Assignee: Nemoto & Co., Ltd.Inventors: Takeshi Takahara, Yasushi Aoki, Kaori Kanesaka, Takashi Murase
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Patent number: 8298442Abstract: 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.Type: GrantFiled: January 25, 2012Date of Patent: October 30, 2012Assignee: Nitto Denko CorporationInventors: Hiroaki Miyagawa, Toshitaka Nakamura, Hironaka Fujii, Amane Mochizuki
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Patent number: 8287759Abstract: A luminescent particle includes an interior portion of the luminescent particle comprising a luminescent compound that reacts with atmospherically present components and a passivating layer on an outer surface of the luminescent particle that is operable to inhibit the reaction between the luminescent compound and the atmospherically present components.Type: GrantFiled: May 15, 2009Date of Patent: October 16, 2012Assignee: Cree, Inc.Inventors: Brian Thomas Collins, Jesse Colin Reiherzer, Florin A. Tudorica