Light Sensitive Patents (Class 252/501.1)
  • Patent number: 7455795
    Abstract: Materials are described for producing memory cells which have a size in the nanometer range and include a CT complex located between two electrodes. The CT complex includes thiophene derivatives, pyrrole derivatives or phthalocyanines together with naphthalenetetracarboxylic acid, dianhydrides, diamides, fullerenes or perylene compounds.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: November 25, 2008
    Assignee: Infineon Technologies AG
    Inventors: Guenter Schmid, Peter Baeuerle, Elena Mean-Osteritz, Marcus Halik, Hagen Klauk
  • Patent number: 7449133
    Abstract: A transparent and conductive film comprising at least one network of graphene flakes is described herein. This film may further comprise an interpenetrating network of other nanostructures, a polymer and/or a functionalization agent(s).
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: November 11, 2008
    Assignee: Unidym, Inc.
    Inventors: George Gruner, Liangbing Hu, David Hecht
  • Publication number: 20080217587
    Abstract: Photovoltaic materials and methods of photovoltaic cell fabrication provide a photovoltaic cell in the form of a fiber. These fibers may be formed into a flexible fabric or textile.
    Type: Application
    Filed: March 18, 2008
    Publication date: September 11, 2008
    Inventors: RUSSELL GAUDIANA, LIAN LI, KETHINNI G. CHITTIBABU, ROBERT D. ECKERT, ALAN MONTELLO, EDMUND MONTELLO, PAUL WORMSER
  • Publication number: 20080213467
    Abstract: An ink for forming CIGS photovoltaic cell active layers is disclosed along with methods for making the ink, methods for making the active layers and a solar cell made with the active layer. The ink contains a mixture of nanoparticles of elements of groups IB, IIIA and (optionally) VIA. The particles are in a desired particle size range of between about 1 nm and about 500 nm in diameter, where a majority of the mass of the particles comprises particles ranging in size from no more than about 40% above or below an average particle size or, if the average particle size is less than about 5 nanometers, from no more than about 2 nanometers above or below the average particle size. The use of such ink avoids the need to expose the material to an H2Se gas during the construction of a photovoltaic cell and allows more uniform melting during film annealing, more uniform intermixing of nanoparticles, and allows higher quality absorber films to be formed.
    Type: Application
    Filed: October 31, 2007
    Publication date: September 4, 2008
    Inventors: Dong Yu, Jacqueline Fidanza, Brian M. Sager
  • Patent number: 7407640
    Abstract: The present invention involves the interaction of radiation with functionalized carbon nanotubes that have been incorporated into various host materials, particularly polymeric ones. The present invention is directed to chemistries, methods, and apparatuses which exploit this type of radiation interaction, and to the materials which result from such interactions. The present invention is also directed toward the time dependent behavior of functionalized carbon nanotubes in such composite systems.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: August 5, 2008
    Assignee: William Marsh Rice University
    Inventors: Enrique V. Barrera, Richard Wilkins, Meisha Shofner, Merlyn X. Pulikkathara, Ranjii Vaidyanathan
  • Publication number: 20080149176
    Abstract: CIGS absorber layers fabricated using coated semiconducting nanoparticles and/or quantum dots are disclosed. Core nanoparticles and/or quantum dots containing one or more elements from group IB and/or IIIA and/or VIA may be coated with one or more layers containing elements group IB, IIIA or VIA. Using nanoparticles with a defined surface area, a layer thickness could be tuned to give the proper stoichiometric ratio, and/or crystal phase, and/or size, and/or shape. The coated nanoparticles could then be placed in a dispersant for use as an ink, paste, or paint. By appropriate coating of the core nanoparticles, the resulting coated nanoparticles can have the desired elements intermixed within the size scale of the nanoparticle, while the phase can be controlled by tuning the stochiometry, and the stoichiometry of the coated nanoparticle may be tuned by controlling the thickness of the coating(s).
    Type: Application
    Filed: December 11, 2007
    Publication date: June 26, 2008
    Applicant: Nanosolar Inc.
    Inventors: Brian M. Sager, Dong Yu, Matthew R. Robinson
  • Publication number: 20080145520
    Abstract: It is intended to provide a method for producing an electronic device having a multilayer structure by a coating method, and a coating solution suitable for the production method. The present invention provides a method for producing an electronic device having at least two or more stacked layers containing organic matter, comprising a first step of applying a coating solution containing organic matter and a metal and/or a metal oxide onto a substrate either directly or via an additional layer to form a mixed layer, and a second step of directly applying a solution containing organic matter onto the mixed layer formed in the first step to form an organic layer. According to this method, an electronic device having a multilayer structure can be produced easily by a convenient coating method.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 19, 2008
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventor: Toru Yumoto
  • Publication number: 20080142763
    Abstract: The present invention provides a method of recrystallizing a silicon sheet, and in particular recrystallizing a small grained silicon sheet to improve material properties such as grain size and orientation. According to one aspect, the method includes using rapid thermal processing (RTP) to melt and recrystallize one or more entire silicon sheet(s) in one heating sequence. According to another aspect, the method includes directionally controlling a temperature drop across the thickness of the sheet so as to facilitate the production of a small number of nuclei in the melted material and their growth into large grains. According to a further aspect, the invention includes a re-crystallization chamber in an overall process flow that enables high-throughput processing of silicon sheets having desired properties for applications such as photovoltaic modules.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 19, 2008
    Inventors: Virendra V. Rana, Robert Z. Bachrach
  • Publication number: 20080145633
    Abstract: Photovoltaic conductive features and processes for forming photovoltaic conductive features are described. The process comprises (a) depositing a composition onto at least a portion of a substrate, wherein the composition comprises metal-containing particles having a primary particle size of from about 10 nanometers to less than 500 nanometers and including a continuous or non-continuous coating of a ceramic material; and (b) heating the composition such that the precursor composition forms at least a portion of a photovoltaic conductive feature. The metal-containing particles are preferably produced by flame spraying.
    Type: Application
    Filed: June 19, 2007
    Publication date: June 19, 2008
    Applicant: Cabot Corporation
    Inventors: Toivo T. Kodas, Miodrag Oljaca, Mark J. Hampden-Smith, George P. Fotou, Mark H. Kowalski, Hyungrak Kim
  • Publication number: 20080135812
    Abstract: An ink for forming CIGS photovoltaic cell active layers is disclosed along with methods for making the ink, methods for making the active layers and a solar cell made with the active layer. The ink contains a mixture of nanoparticles of elements of groups IB, IIIA and (optionally) VIA. The particles are in a desired particle size range of between about 1 nm and about 500 nm in diameter, where a majority of the mass of the particles comprises particles ranging in size from no more than about 40% above or below an average particle size or, if the average particle size is less than about 5 nanometers, from no more than about 2 nanometers above or below the average particle size. The use of such ink avoids the need to expose the material to an H2Se gas during the construction of a photovoltaic cell and allows more uniform melting during film annealing, more uniform intermixing of nanoparticles, and allows higher quality absorber films to be formed.
    Type: Application
    Filed: October 31, 2007
    Publication date: June 12, 2008
    Inventors: Dong Yu, Jacqueline Fidanza, Brian M. Sager
  • Publication number: 20080135811
    Abstract: An ink for forming CIGS photovoltaic cell active layers is disclosed along with methods for making the ink, methods for making the active layers and a solar cell made with the active layer. The ink contains a mixture of nanoparticles of elements of groups IB, IIIA and (optionally) VIA. The particles are in a desired particle size range of between about 1 nm and about 500 nm in diameter, where a majority of the mass of the particles comprises particles ranging in size from no more than about 40% above or below an average particle size or, if the average particle size is less than about 5 nanometers, from no more than about 2 nanometers above or below the average particle size. The use of such ink avoids the need to expose the material to an H2Se gas during the construction of a photovoltaic cell and allows more uniform melting during film annealing, more uniform intermixing of nanoparticles, and allows higher quality absorber films to be formed.
    Type: Application
    Filed: October 31, 2007
    Publication date: June 12, 2008
    Inventors: Dong Yu, Jacqueline Fidanza, Brian M. Sager
  • Publication number: 20080138501
    Abstract: An ink for forming CIGS photovoltaic cell active layers is disclosed along with methods for making the ink, methods for making the active layers and a solar cell made with the active layer. The ink contains a mixture of nanoparticles of elements of groups IB, IIIA and (optionally) VIA. The particles are in a desired particle size range of between about 1 nm and about 500 nm in diameter, where a majority of the mass of the particles comprises particles ranging in size from no more than about 40% above or below an average particle size or, if the average particle size is less than about 5 nanometers, from no more than about 2 nanometers above or below the average particle size. The use of such ink avoids the need to expose the material to an H2Se gas during the construction of a photovoltaic cell and allows more uniform melting during film annealing, more uniform intermixing of nanoparticles, and allows higher quality absorber films to be formed.
    Type: Application
    Filed: October 31, 2007
    Publication date: June 12, 2008
    Inventors: Dong Yu, Jacqueline Fidanza, Brian M. Sager
  • Patent number: 7384716
    Abstract: A coating composition for an electrophotographic photoreceptor that forms a charge-generating layer by being ejected from ejection nozzles in a form of droplets, comprises a charge-generating substance, a binding resin, and a solvent, has a viscosity of 1 mPa·s to 10 mPa·s, and the solvent contains at least one kind of high-boiling point solvent having a boiling point of 120° C. to 260° C., and the high-boiling point solvent is contained at a ratio of 5 parts by weight to 40 parts by weight with respect to 100 parts by weight of the coating composition for an electrophotographic photoreceptor.
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: June 10, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Masanori Kinomoto
  • Patent number: 7378034
    Abstract: The invention relates to an ionic compound corresponding to the formula [R1X1(Z1)-Q?-X2(Z2)-R2]m Mm+ in which Mm+ is a cation of valency m, each of the groups Xi is S=Z3, S=Z4, P—R3 or P—R4; Q is N, CR5, CCN or CSO2R5, each of the groups Zi is ?O, ?NC?N, ?C(C?N)2, ?NS(=Z)2R6 or ?C[S(=Z)2R6]2, each of the groups Ri, is Y, YO—, YS—, Y2N— or F, Y represents a monovalent organic radical or alternatively Y is a repeating unit of a polymeric frame. The compounds are useful for producing ion conducting materials or electrolytes, as catalysts and for doping polymers.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: May 27, 2008
    Assignees: Universite de Montreal, Centre National de la Recherche Scientifique, Institute of Organic Chemistry National Academy of Sciences of Ukraine
    Inventors: Michel Armand, Christophe Michot, Yurii Yagupolskii, Lev Yagupolskii, Andrej Bezdudny, Natalya Kondratenko
  • Publication number: 20080110497
    Abstract: [PROBLEMS] To develop metal microparticles useful in dye-sensitized solar cell, etc. and to provide a photoelectric transducer capable of exhibiting enhanced release voltage in dye-sensitized solar cell. [MEANS FOR SOLVING PROBLEMS] There are provided modified titanium oxide microparticles comprised of titanium oxide and one or two or more types of nontitanic metal oxides (including silicon oxides) selected from the group consisting of periodic-table group IB oxides, group IIA oxides, group IIB oxides, group IIIA oxides, group IIIB oxides, group IVA oxides other than titanium oxides, group IVB oxides, group VIA oxides, group VIII oxides and vanadium oxides. Further, there is provided a photoelectric transducer making use of the modified titanium oxide microparticles.
    Type: Application
    Filed: January 26, 2006
    Publication date: May 15, 2008
    Applicant: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Teruhisa Inoue, Koichiro Shigaki, Takayuki Hoshi, Masayoshi Kaneko
  • Patent number: 7338704
    Abstract: A coating composition containing a resinous binder with colorants and reflective pigments. The colorants absorb visible light at a first wavelength and produce fluorescent light at a second wavelength band when exposed to visible light. When applied to a substrate, the coating composition appears as one color on face from the specular reflection of the colorants off the reflective pigments and a different color on flop from the fluorescent light produced by the colorants.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: March 4, 2008
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Eldon L. Decker, Calum H. Munro, Robert E. Jennings
  • Patent number: 7118836
    Abstract: A substantially transparent conductive layer on a support, the layer comprising an intrinsically conductive polymer e.g. containing an intrinsically conductive polymer optionally containing structural units represented by formula (I): wherein n is larger than 1 and each of R1 and R2 independently represents hydrogen or an optionally substituted C1-4 alkyl group or together represent an optionally substituted C1-4 alkylene group or an optionally substituted cycloalkylene group, preferably an ethylene group, an optionally alkyl-substituted methylene group, an optionally C1-12 alkyl- or phenyl-substituted ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group; and a conductive metal non-uniformly distributed therein and forming of itself a conductive entity; a process for preparing the transparently conductive layer; and light emitting diodes, photovoltaic devices, transistors and electroluminescent devices comprising the above-described conductive layer.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: October 10, 2006
    Assignee: Agfa Gevaert
    Inventor: Hieronymus Andriessen
  • Patent number: 7053133
    Abstract: An ultraviolet activatable adhesive film comprising an epoxy resin, an ultraviolet activatable cationic polymerization catalyst and cationic polymerization inhibitor and water in an amount effective to suppress the cationic polymerization of the film and prolong the time from activation to thermal press-bonding after the ultraviolet activatable adhesive film is activated by irradiation by ultraviolet rays.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: May 30, 2006
    Inventors: Hiroaki Yamaguchi, Tetsu Kitamura
  • Patent number: 6916982
    Abstract: The present invention provides methods, compounds, and compositions for the synthesis of light harvesting arrays, such arrays comprising: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to said first electrode, each of said light harvesting rods comprising a polymer of Formula I: X1?Xm+1)m??(I) wherein m is at least 1; X1 is a charge separation group, and X2 through Xm+1 are chromophores. At least one of X2 through Xm+1 has at least one perylene group coupled thereto.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: July 12, 2005
    Assignee: North Carolina State University
    Inventors: Robert S. Loewe, Kin-ya Tomizaki, Jonathan S. Lindsey
  • Patent number: 6913713
    Abstract: Photovoltaic materials and methods of photovoltaic cell fabrication provide a photovoltaic cell in the form of a fiber. These fibers may be formed into a flexible fabric or textile.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: July 5, 2005
    Assignee: Konarka Technologies, Inc.
    Inventors: Kethinni Chittibabu, Robert Eckert, Russell Gaudiana, Lian Li, Alan Montello, Edmund Montello, Paul Wormser
  • Patent number: 6911595
    Abstract: A charge transfer material comprising a basic compound having negative charge and represented by the following general formula (I): (A1-L)n1-A2·M??(I), wherein A1 represents a group having negative charge; A2 represents a basic group; M represents a cation for neutralizing the negative charge of (A1-L)n1-A2; L represents a divalent linking group or a single bond; and n1 represents an integer of 1 to 3. A photoelectric conversion device and a photo-electrochemical cell comprising the charge transfer material. A new nonvolatile pyridine compound, which is a low-viscosity liquid at room temperature, is preferably used for A2.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: June 28, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masaru Yoshikawa, Chang-yi Qian
  • Patent number: 6893489
    Abstract: A coating, such as ink or paint, is used, where particles in the coating are selected based on electric, magnetic, or light/photo properties, and are dispersed in the coating to provide a desired physical color. In one approach, the application of the coating to the substrate such as paper is controlled using an electric or magnetic field. In another approach, a pattern is formed in a coating on a substrate by targeting an electric, magnetic or photo field to specific locations on the coating. In yet another approach, the color of a coating that is applied to an object is shifted to match a background color so that the coating appears to be erased. In this approach, the coating may be in the form of a label, such as a bar code, that can be read by a scanner at a point of sale location. In another approach a pattern or code is scrambled or removed by applying an electric, magnetic, or photo field to specific locations on the coating or substrate.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: May 17, 2005
    Assignee: Honeywell International Inc.
    Inventors: Kwok-Wai Lem, Ronald P. Rohrbach
  • Patent number: 6864375
    Abstract: In various embodiments, chromophores are described that include novel electron acceptors, novel electron donors, and/or novel conjugated bridges that are useful in nonlinear optical applications. In some embodiments, the present invention provides chromophore architectures wherein a chromophore contains more than one electron acceptor in electronic communication with a single electron donor, and/or more than one electron donor in electronic communication with a single electron acceptor. Also described is processes for providing materials comprising the novel chromophores and polymer matrices containing the novel chromophores. Electro-optic devices described herein contain one or more of the described electron acceptors, electron donors, conjugated bridges, or chromophores.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: March 8, 2005
    Assignee: Lumera Corporation
    Inventors: Diyun Huang, Tim Londergan, Galina K. Todorova, Jingsong Zhu
  • Patent number: 6858161
    Abstract: A method for purifying an electronic item material, which comprises dissolving an electronic item material or its intermediate product in an organic solvent and having the solution contacted with activated clay at a temperature of 65° C. to 200° C.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: February 22, 2005
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Katsumi Abe, Tomonori Nishimura, Takanobu Watanabe, Susumu Suzuka
  • Publication number: 20040140459
    Abstract: A lighting device for illuminating an object from a light source includes a housing having an inner surface portions of which are diffusely reflective and an aperture disposed in the housing aligned with the light source. The lighting device further includes a diffuser positioned between the light source and the object and a reflector disposed adjacent the aperture between the light source and the diffuser.
    Type: Application
    Filed: September 15, 2003
    Publication date: July 22, 2004
    Inventors: Scott D. Haigh, Tuan A. Hoang, Charles F. Duggan, David Bohaker, Leo M. Kenen
  • Publication number: 20040142257
    Abstract: An organic optoelectronic device includes a solution coatable thin film having a hole transporting material, an electron transporting material, and a photogenerating component uniformly dispersed therein. The thin film is about 0.2 microns or less, and can be spin-coated onto a substrate and further coated with electrodes.
    Type: Application
    Filed: January 21, 2003
    Publication date: July 22, 2004
    Applicant: XEROX CORPORATION
    Inventor: Andronique Ioannidis
  • Patent number: 6720029
    Abstract: A coating liquid for forming an organic layer of an organic LED display which layer includes a light-emitting layer or a light-emitting layer and a charge-transporting layer, the liquid comprising: an organic material or a precursor thereof required for forming the organic layer, and at least one low volatile liquid solvent having a vapor pressure of 10 mmHg or less at 20° C. and a boiling point lower than a denaturing temperature of the organic material or lower than a converting temperature of the precursor.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: April 13, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshimasa Fujita, Yoshitaka Kawase
  • Patent number: 6720039
    Abstract: A liquid crystalline compound having a novel structure and a process for producing the same are provided. The liquid crystalline compound is represented by the following general formula (I): wherein R1 and R2 each independently represent a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon group having 1 to 22 carbon atoms and may be attached directly to the aromatic ring without through X1 or X2; R3 represents a hydrogen atom, a cyano group, a nitro group, a fluorine atom, or a methyl group; and X1 and X2 each independently represent an oxygen atom, a sulfur atom, or a —CO—, —OCO—, —COO—, —N═CH—, —CONH—, —NH—, —NHCO—, or —CH2— group.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: April 13, 2004
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Junichi Hanna, Masahiro Funahashi, Komei Kafuku, Kyoko Kogo
  • Publication number: 20040063013
    Abstract: The present invention relates to a photoconductive organic pigment comprising granular cores and an organic pigment having photoconductive properties which organic pigment adheres to the surfaces of the granular cores, a photoconductive organic pigment dispersion liquid comprising the photoconductive organic pigment, and an electrophotographic photoreceptor comprising an electroconductive substrate laminated with a photosensitive layer containing the photoconductive organic pigment and an electrophotographic device using the electrophotographic photoreceptor.
    Type: Application
    Filed: March 17, 2003
    Publication date: April 1, 2004
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Kazuya Hongo, Seiichi Takagi
  • Patent number: 6713000
    Abstract: A photocurable silver composition is provided which comprises an ultraviolet light curable organic mixture, a photoinitiator, a silver powder, and a silver flake composition. The silver flake composition comprises at least 20% of the weight of the silver powder. The disclosed compositions may be used to produce silver-containing coatings on a variety of different substrates. Related methods are provided.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: March 30, 2004
    Assignee: Allied PhotoChemical, Inc.
    Inventor: Roy C. Krohn
  • Publication number: 20040055635
    Abstract: A conductive paste used for a rear electrode of a Si solar battery includes an Al powder, a glass frit, an organic vehicle and particles insoluble or slightly soluble in the organic vehicle. The particles are constituted of an organic compound or carbon or both. The conductive paste does not shrink much during firing and, consequently reduces the amount of Si wafer warping while maintaining the functions of a rear electrode for a Si solar battery.
    Type: Application
    Filed: August 28, 2003
    Publication date: March 25, 2004
    Inventors: Hiroshi Nagakubo, Fumiya Adachi
  • Patent number: 6689288
    Abstract: The invention described herein supplies a new class of electroactive polymeric blend materials which offer both sensing and actuation dual functionality. The blend comprises two components, one component having a sensing capability and the other component having an actuating capability. These components should be co-processable and coexisting in a phase separated blend system. Specifically, the materials are blends of a sensing component selected from the group consisting of ferroelectric, piezoelectric, pyroelectric and photoelectric polymers and an actuating component that responds to an electric field in terms of dimensional change. Said actuating component includes, but is not limited to, electrostrictive graft elastomers, dielectric electroactive elastomers, liquid crystal electroactive elastomers and field responsive polymeric gels. The sensor functionality and actuation functionality are designed by tailoring the relative fraction of the two components.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: February 10, 2004
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Terry L. St. Clair, Joycelyn S. Harrison, Ji Su, Zoubeida Ounaies
  • Publication number: 20030234286
    Abstract: The invention provides a composition having laser engraving properties, comprising a host material and an effective amount of a laser enhancing additive. The laser enhancing additive comprises a first quantity of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI), and a second quantity at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. The composition can be engraved with grayscale images by an Nd:Yag laser and can be added to laminates or coatings. The composition can be used during the manufacture of many articles of manufacture, including identification documents.
    Type: Application
    Filed: December 20, 2002
    Publication date: December 25, 2003
    Inventors: Brian Labrec, Robert Jones
  • Patent number: 6660379
    Abstract: The steady state and time resolved luminescence spectral properties of two types of novel CdS nanoparticles and nanoparticles are described. CdS nanoparticles formed in the presence of an amine-terminated dendrimer show blue emission. The emission wavelength of these nanoparticles depended on the excitation wavelength. The CdS/dendrimer nanoparticles display polarized emission with the anisotropy rising progressively from 340 to 420 nm excitation, reaching a maximal anisotropy value in excess of 0.3. A new constant positive polarized emission from luminescent nanoparticles is also described. Polyphosphate-stabilized CdS nanoparticles are described that display a longer wavelength red emission maximum than bulk CdS and display a zero anisotropy for all excitation wavelengths. Both nanoparticles display strongly heterogeneous intensity decays with mean decay times of 93 ns and 10 &mgr;s for the blue and red emitting particles, respectively.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: December 9, 2003
    Assignee: University of Maryland, Baltimore
    Inventors: Joseph R. Lakowicz, Ignacy Gryczynski, Zygmunt Gryczynski
  • Publication number: 20030188777
    Abstract: Co-sensitizers that co-adsorb with a sensitizing dye to the surface of an interconnected semiconductor oxide nanoparticle material increase the efficiency of photovoltaic cells by improving their charge transfer efficiency and reducing the back transfer of electrons from the interconnected semiconductor oxide nanoparticle material to the sensitizing dye.
    Type: Application
    Filed: January 24, 2003
    Publication date: October 9, 2003
    Applicant: Konarka Technologies, Inc.
    Inventors: Russell Gaudiana, Savvas Hadjikyriacou, Jin-An He, David Waller, Zhengguo Zhu
  • Patent number: 6623900
    Abstract: A di-substituted alkylene glycolate titanium phthalocyanine compound comprising a reaction mixture of a threo-alkanediol having one hydroxy group per each of the two adjacent carbon atoms, said carbon atoms each being a secondary carbon atom, and an oxytitanium phthalocyanine compound, and an organic photoconductor comprising the di-substituted alkylene glycolate titanium phthalocyanine compound are disclosed.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: September 23, 2003
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventor: Yoshitaka Saito
  • Patent number: 6613488
    Abstract: A phthalimide salt compound is contained in a photosensitive material having a charge generating function. Such a photosensitive material exhibits high retention rates of the surface charge. An electrophotographic photoconductor comprising such a photosensitive material is useful in, for example, printers, photocopiers, and facsmilie machines.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: September 2, 2003
    Assignee: Fuji Electric Imaging Devices Co., Ltd.
    Inventors: Yoichi Nakamura, Shinjirou Suzuki, Hideki Kina, Kenichi Hara, Teruo Sasaki
  • Publication number: 20030141487
    Abstract: A composition for forming an electrically conductive antistatic layer comprises: electronically conductive polymer particles; a neutral-charge conductivity enhancer; and a hydrophilic polymeric binder.
    Type: Application
    Filed: December 26, 2001
    Publication date: July 31, 2003
    Applicant: Eastman Kodak Company
    Inventors: Mark Lelental, Charles C. Anderson, John M. Pochan, James L. Wakley, James F. Elman
  • Patent number: 6589447
    Abstract: Provided is a compound semiconductor single crystal and a fabrication process for a compound semiconductor device capable of forming a prescribed pattern without requirement of many steps. A group V element component in a III-V compound semiconductor single crystal or a group VI element component in the II-VI compound semiconductor single crystal is reduced less than a composition ratio expressed by a chemical formula of a corresponding compound semiconductor single crystal in a pattern-shaped portion.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: July 8, 2003
    Assignee: Shin-Etsu Handotai Co., Ltd.
    Inventors: Junya Ishizaki, Nobuhiko Noto
  • Publication number: 20030111108
    Abstract: The present invention provides a convergent method for the synthesis of light harvesting rods. The rods are oligomers of the formula A1(Ab+1)b, wherein b is at least 1, A1 through Ab+1 are covalently coupled rod segments, and each rod segment A1 through A1+b comprises a compound of the formula X1(Xm+1)m wherein m is at least 1 and X1 through Xm+1 are covalently coupled porphyrinic macrocycles. Light harvesting arrays and solar cells containing such light harvesting rods are also described, along with intermediates useful in such methods and rods produced by such methods.
    Type: Application
    Filed: August 24, 2001
    Publication date: June 19, 2003
    Inventors: Jonathan S. Lindsey, Robert S. Loewe
  • Publication number: 20030075216
    Abstract: The present invention provides methods, compounds, and compositions for the synthesis of light harvesting arrays, such arrays comprising: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to said first electrode, each of said light harvesting rods comprising a polymer of Formula I:
    Type: Application
    Filed: June 6, 2002
    Publication date: April 24, 2003
    Inventors: Robert S. Loewe, Kin-ya Tomizaki, Jonathan S. Lindsey
  • Patent number: 6537510
    Abstract: One embodiment of the present invention provides a conductive pigment powder, which includes indium oxide, tin and gold, and having a purple color tone. Other embodiments of the present invention provide a method of producing a conductive pigment powder; a dispersion solution and a transparent conductive film, which include the above-mentioned conductive pigment powder; a method of forming a transparent conductive film; and a cathode ray tube, which includes the above-mentioned transparent conductive film and a transparent substrate.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: March 25, 2003
    Assignee: Mitsubishi Materials Corporation
    Inventors: Toshiharu Hayashi, Hiroshi Yamaguchi, Daisuke Shibuta
  • Patent number: 6514431
    Abstract: An ion conductive material comprising a mixture of a solvent, a supporting electrolyte, and an ultraviolet absorber and alternatively a polymerizable monomer and having an ion conductivity at 25° C. of 1×10−7 or greater; the ultraviolet absorber being contained in the ion conductive material in such an amount that the transmissivity of electromagnetic rays having a wavelength from 300 to 360 nm and transmitting through an layer of the ion conductive material of 0.2 mm in thickness can be maintained 0.1% or below. The ion conductive material is suitable for use in various electrochromic devices.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: February 4, 2003
    Assignee: Nippon Mitsubishi Oil Corporation
    Inventors: Yoshinori Nishikitani, Hiroshi Imafuku, Shinji Ohshima
  • Patent number: 6485658
    Abstract: Disclosed are a phthalocyanine composition having main diffraction peaks at 7.0°, 9.0°, 14.1°, 18.0°, 23.7° and 27.3° of Bragg angles (2&thgr;±0.2°) in an X-ray diffraction spectrum with Cu K&agr;, a process for producing the same and an electrophotographic photoreceptor using the same.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: November 26, 2002
    Assignee: Mitsubishi Paper Mills, Limited
    Inventors: Tamotsu Horiuchi, Hideki Nagamura, Makoto Okaji
  • Patent number: 6468884
    Abstract: A method of forming a silicon-contained crystal thin film can efficiently form the crystal thin film of a relatively large thickness. In the method, hydrogen ions are implanted into a silicon-contained crystal substrate. Voids are formed by immersing the ion-implanted crystal substrate in a melted metal liquid containing, e.g., silicon and indium for heating the substrate. While pressing an ion-injected surface of the substrate, the substrate is heated by the melted metal liquid to form the voids. By cooling the liquid, the silicon in the supersaturated liquid is deposited on the surface of the substrate so that the silicon-contained crystal film is formed on the surface of the substrate. The substrate is divided in the void-formed position. Thereby, a thin film including the silicon-contained crystal film layered on a portion of the substrate is obtained. The silicon-contained crystal thin film thus obtained can be adhered to a support substrate, if necessary.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: October 22, 2002
    Assignee: Nissin Electric Co., Ltd.
    Inventors: Koji Miyake, Kiyoshi Ogata
  • Patent number: 6340535
    Abstract: This invention relates to a method for the heat treatment of a ZnSe crystal substrate to dope it with Al as a donor impurity, a ZnSe crystal substrate prepared by this heat treatment and a light-emitting device using the ZnSe crystal substrate, in particular, the method for the heat treatment of a ZnSe crystal substrate comprising previously forming an Al film on the substrate, first subjecting the substrate to a heat treatment in a Se atmosphere and then subjecting to a heat treatment in a Zn atmosphere.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: January 22, 2002
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasuo Namikawa, Shinsuke Fujiwara
  • Patent number: 6338822
    Abstract: A sensor for the optical determination by fluorescence of carbon dioxide in liquid and gaseous media, which consist essentially of a carrier and a light-sensitive layer applied thereto. In addition to a polymer as a base substance and an anionic fluorescence dye, the light-sensitive layer also contains a quaternary onium phenolate.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: January 15, 2002
    Assignee: Novartis AG
    Inventors: Adrian Waldner, Steven Mark Barnard
  • Patent number: 6331348
    Abstract: Paste comprising metallic organic compound, in particular, gold-based metallic organic compound is used as a conductive material for repairing the broken defective part and is baked. This can produce a very thin metallic film having low electric resistance. Further, a semiconductor laser is used as a heating unit to heat only the broken defective part, and a heating profile having a baking process of provisional baking and main baking and a cooling process is provided to produce the high-quality thin metallic film having no crack and a dense texture.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: December 18, 2001
    Assignee: Alps Electric Co., Ltd.
    Inventors: Osamu Sakai, Keiji Takagi
  • Publication number: 20010045547
    Abstract: A conductive (electrical, ionic, and photoelectric) polymer membrane article, comprising a non-woven membrane of polymer fibers, wherein at least some of the fibers have diameters of less than one micron; and wherein the membrane has an electrical conductivity of at least about 10−6 S/cm. Also disclosed is the method of making such an article, comprising electrostatically spinning a spin dope comprising a polymer carrier and/or a conductive polymer or conductive nanoparticles, to provide inherent conductivity in the article.
    Type: Application
    Filed: February 22, 2001
    Publication date: November 29, 2001
    Inventors: Kris Senecal, Lynne Samuelson, Michael Sennett, Heidi Schreuder-Gibson
  • Patent number: 6319427
    Abstract: There are provided mesoporous silica materials containing in their pores stabilized clusters of silicon atoms, of size 2 nanometers or less, and capable of photoluminescence to emit fast photons. They are prepared by chemical vapour deposition of silicon or a silicon precursor such as disilane, under soft conditions such as temperature of 100-150° C., into the mesopores of silicate films which have mesoporous channels prepared by growth of the films using a template to control their sizes, but without removing the template residues from the films prior to the chemical vapour deposition. The template residues serve to limit the size of the silicon clusters which conform. The use of the soft conditions on CVD retains the template residues in an intact, substantially unchanged form. The resultant films have clusters of silicon, of 2 nanometer size or less, anchored to the mesopores, and air stable, so that they can be used in optoelectronic devices in conjunction with standard silicon semiconductors.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: November 20, 2001
    Inventors: Geoffrey A. Ozin, Ömer Dag, Hong Yang