Patents by Inventor Yeokwon YOON

Yeokwon YOON 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).

  • CIGS light-absorbing ink and method for preparing CIGS light-absorbing layer
    Patent number: 9117962
    Abstract: The present invention relates to a method for preparing a CIS- or CIGS-based light-absorbing layer which is included in a thin film solar cell. More particularly, the present invention relates to a method for preparing a CIS- or CIGS-based light-absorbing layer which ultimately improves the efficiency of a solar cell since the remaining carbon impurities in the formed light-absorbing layer are minimized and additional sulfurization treatment or selenium treatment is made optional, not requisite.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: August 25, 2015
    Assignee: GS CALTEX CORPORATION
    Inventors: Yeokwon Yoon, Tae-Seok Lee, Kyoung-Jun Lee, Jae-Hong Kim
  • CIGS LIGHT-ABSORBING INK AND METHOD FOR PREPARING CIGS LIGHT-ABSORBING LAYER
    Publication number: 20150132885
    Abstract: The present invention relates to a method for preparing a CIS- or CIGS-based light-absorbing layer which is included in a thin film solar cell. More particularly, the present invention relates to a method for preparing a CIS- or CIGS-based light-absorbing layer which ultimately improves the efficiency of a solar cell since the remaining carbon impurities in the formed light-absorbing layer are minimized and additional sulfurization treatment or selenium treatment is made optional, not requisite.
    Type: Application
    Filed: October 8, 2014
    Publication date: May 14, 2015
    Inventors: Yeokwon YOON, Tae-Seok LEE, Kyoung-Jun LEE, Jae-Hong KIM
  • METHOD FOR PREPARING LIGHT-ABSORBING LAYER FOR CIS- OR CIGS-BASED SOLAR CELLS, AND LIGHT-ABSORBING INK FOR CIS- OR CIGS-BASED SOLAR CELLS
    Publication number: 20150125989
    Abstract: The present invention relates to a method for preparing a CIS- or CIGS-based light-absorbing layer which is to be included in thin-film solar cells. More particularly, the present invention relates to a method for preparing a CIS- or CIGS-based light-absorbing layer, which can ultimately improve the efficiency of solar cells, characterized by comprising the steps of: preparing a light-absorbing ink including a precursor of copper, indium, or gallium as an organic metal precursor, and a solvent, wherein a ligand in the organic metal precursor has a keto-enol tautomeric property; and coating a substrate with the light-absorbing ink and performing a heat treatment, thereby minimizing the remaining carbon impurities of the light-absorbing layer.
    Type: Application
    Filed: October 8, 2014
    Publication date: May 7, 2015
    Inventor: Yeokwon YOON