Patents by Inventor Jun Ho Yum

Jun Ho Yum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11908636
    Abstract: Method for making a gas diffusion layer for an electrode, the method including processing quartz wool with water in a blender to form a suspension, filtering the suspension to remove water and contaminants, to form a cake of entangled quartz fibres, annealing the cake of entangled quartz fibres without complete melting of the fibres to obtain a porous quartz felt having pore size greater than 1 ?m and coating the porous quartz felt with a conductive material. Gas diffusion layer for an electrode and photoelectrode including the gas diffusion layer.
    Type: Grant
    Filed: December 13, 2022
    Date of Patent: February 20, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hannah Johnson, Sachin Kinge, Marina Caretti, Jun-Ho Yum, Kevin Sivula, Elizaveta Mensi
  • Publication number: 20230197357
    Abstract: Method for making a gas diffusion layer for an electrode, the method including processing quartz wool with water in a blender to form a suspension, filtering the suspension to remove water and contaminants, to form a cake of entangled quartz fibres, annealing the cake of entangled quartz fibres without complete melting of the fibres to obtain a porous quartz felt having pore size greater than 1 ?m and coating the porous quartz felt with a conductive material. Gas diffusion layer for an electrode and photoelectrode including the gas diffusion layer.
    Type: Application
    Filed: December 13, 2022
    Publication date: June 22, 2023
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hannah JOHNSON, Sachin KINGE, Marina CARETTI, Jun-Ho YUM, Kevin SIVULA, Elizaveta MENSI
  • Patent number: 9779879
    Abstract: The present invention provides an improved redox couple for electrochemical and optoelectronic devices. The redox couple is based on a complex of a first row transition metal, said complex containing at least one mono-, bi-, or tridentate ligand comprising a substituted or unsubstituted ring or ring system comprising a five-membered N-containing heteroring and/or a six-membered ring comprising at least two heteroatoms, at least one of which being a nitrogen atom, said five- or six-membered heteroring, respectively, comprising at least one double bond. The invention also relates to electrolytes and to the devices containing the complex, and to the use of the complex as a redox couple. The invention further provides electrochemical and/or optoelectronic devices comprising a first and a second electrode and, between said first and second electrode, a charge transport layer, said a charge transport layer comprising tetracyanoborate ([B(CN)4]?) and a cationic metal complex functioning as redox-couple.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: October 3, 2017
    Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)
    Inventors: Mohammad Khaja Nazeeruddin, Michael Graetzel, Etienne Baranoff, Florian Kessler, Jun-Ho Yum, Aswani Yella, Hoi Nok Tsao, Shaik Mohammad Zakeeruddin
  • Patent number: 9697956
    Abstract: The present invention relates to compounds of formula (I) based on DPP moiety being useful as metal-free organic sensitizers or dyes of type D-?-A in electrochemical or optoelectronic devices, their use as sensitizer or dye and an electrochemical or optoelectronic device comprising a compound of the invention.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: July 4, 2017
    Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)
    Inventors: Thomas Wesley Holcombe, Jun Ho Yum, Mohammad Khaja Nazeeruddin, Michael Graetzel
  • Publication number: 20150213966
    Abstract: The present invention relates to compounds of formula (I) based on DPP moiety being useful as metal-free organic sensitizers or dyes of type D-?-A in electrochemical or optoelectronic devices, their use as sensitizer or dye and an electrochemical or optoelectronic device comprising a compound of the invention.
    Type: Application
    Filed: August 14, 2013
    Publication date: July 30, 2015
    Inventors: Thomas Wesley Holcombe, Jun Ho Yum, Mohammad Khaja Nazeeruddin, Michael Graetzel
  • Publication number: 20140060641
    Abstract: The present invention provides an improved redox couple for electrochemical and optoelectronic devices. The redox couple is based on a complex of a first row transition metal, said complex containing at least one mono-, bi-, or tridentate ligand comprising a substituted or unsubstituted ring or ring system comprising a five-membered N-containing heteroring and/or a six-membered ring comprising at least two heteroatoms, at least one of which being a nitrogen atom, said five- or six-membered heteroring, respectively, comprising at least one double bond. The invention also relates to electrolytes and to the devices containing the complex, and to the use of the complex as a redox couple. The invention further provides electrochemical and/or optoelectronic devices comprising a first and a second electrode and, between said first and second electrode, a charge transport layer, said a charge transport layer comprising tetracyanoborate ([B(CN)4]?) and a cationic metal complex functioning as redox-couple.
    Type: Application
    Filed: February 24, 2012
    Publication date: March 6, 2014
    Applicant: Ecole Polytechnique Federale de Lausanne
    Inventors: Mohammad Khaja Nazeeruddin, Michael Graetzel, Etienne Baranoff, Florian Kessler, Jun-Ho Yum, Aswani Yella, Hoi Nok Tsao, Shaik Mohammad Zakeeruddin
  • Publication number: 20050016586
    Abstract: A method for fabricating a counter electrode for a dye-sensitized solar cell includes co-sputtering platinum and a metal oxide as target materials to deposit nanocrystalline platinum and an amorphous metal oxide on the substrate. The counter electrode exhibits improved performances as an electro-catalyst to assist in the reduction of I3? during operation of a dye-sensitized solar cell.
    Type: Application
    Filed: January 23, 2004
    Publication date: January 27, 2005
    Applicant: Kwangju Institute of Science and Technology
    Inventors: Seok-Soon Kim, Kyung-Won Park, Jun-Ho Yum, Yung-Eun Sung
  • Patent number: 6627060
    Abstract: A method for coating a phosphor on a flat display using electrophoretic deposition (EPD) and lithography is provided. In the method, an adhesive strength can be enhanced without passing through a high-temperature thermal treatment process as a post-process. Phosphor powders are coated on a substrate by a field emission display (FED) and then a ultraviolet (UV) curable layer is coated. Then, an adhesive strength of the phosphor can be greatly enhanced through UV irradiation, in comparison with a post-process such as a thermal treatment process. Also, the UV curable layer can be lithographically etched by the UV light, and thus the phosphor can be coated by a predetermined pattern, to then be applied to a next-generation display such as a FED or PDP as an optimal method for full color realization.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: September 30, 2003
    Assignee: Kwangju Institute of Science and Technology
    Inventors: Jun Ho Yum, Yung Eun Sung