Patents by Inventor Yangdan Ou

Yangdan Ou 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).

  • Methods for manufacturing spinel-type ternary metal oxides as hole transport materials
    Patent number: 11820668
    Abstract: Methods for preparation of surfactant-free ultra-small spinel ternary metal oxide nanoparticles are provided. A method comprises dissolving first and second metal salts in deionized water in a specific mole ratio to form a solution comprising two different metal ions, applying a coprecipitation method and adding an alkaline solution to the solution to form a colloidal suspension, wherein a colloid of the colloidal suspension is a metal hydroxide, adjusting the amount and the addition rate of the alkaline solution to form a specific structure of metal hydroxide precipitate; washing and drying the metal hydroxide to form a structured metal hydroxide powder, and applying a calcination method to the structured metal hydroxide powder to form a surfactant-free spinel-type (AB2O4) ternary metal oxide, wherein A and B each respectively comprise a metal element.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: November 21, 2023
    Assignee: THE UNIVERSITY OF HONG KONG
    Inventors: Chik Ho Wallace Choy, Zhanfeng Huang, Yangdan Ou
  • METHODS FOR MANUFACTURING SPINEL-TYPE TERNARY METAL OXIDES AS HOLE TRANSPORT MATERIALS
    Publication number: 20210198120
    Abstract: Methods for preparation of surfactant-free ultra-small spinel ternary metal oxide nanoparticles are provided. A method comprises dissolving first and second metal salts in deionized water in a specific mole ratio to form a solution comprising two different metal ions, applying a coprecipitation method and adding an alkaline solution to the solution to form a colloidal suspension, wherein a colloid of the colloidal suspension is a metal hydroxide, adjusting the amount and the addition rate of the alkaline solution to form a specific structure of metal hydroxide precipitate; washing and drying the metal hydroxide to form a structured metal hydroxide powder, and applying a calcination method to the structured metal hydroxide powder to form a surfactant-free spinel-type (AB2O4) ternary metal oxide, wherein A and B each respectively comprise a metal element.
    Type: Application
    Filed: July 18, 2019
    Publication date: July 1, 2021
    Inventors: Chik Ho Wallace Choy, Zhanfeng Huang, Yangdan Ou