Patents by Inventor Kumar MALLEM

Kumar MALLEM 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).

  • Light Emitting Diodes with Supressed Electron Leakage Current
    Publication number: 20250120246
    Abstract: A light emitting device (LED) comprises a substrate, an anode layer disposed on the substrate, a hole injection layer disposed on the anode layer, a hole transport layer disposed on the hole injection layer, an emitting layer disposed on the hole transport layer, an electron transport layer disposed on the emitting layer, and a cathode layer disposed on the electron transport layer. At least one of the anode layer and the cathode layer is transparent. The emitting layer comprises a mixture of luminescent nanoparticles and an insulating material.
    Type: Application
    Filed: October 8, 2024
    Publication date: April 10, 2025
    Inventors: Kumar MALLEM, Abhishek Kumar SRIVASTAVA, Maksym F. PRODANOV, Zebing LIAO
  • Method for manufacturing selective emitter using surface structure and solar cell including selective emitter using surface structure
    Patent number: 10861987
    Abstract: Proposed is a method for manufacturing a selective emitter using a surface structure, the method includes: preparing a wafer; forming fine first surface unevenness in each of front and rear faces of the wafer; forming a texturing-inhibiting film on each of the front and rear faces of the wafer; partially patterning the front texturing-inhibiting film to expose a portion of the front face of the wafer; forming second surface unevenness in the exposed portion of the wafer, wherein the second surface unevenness has a roughness greater and deeper than a roughness of the first surface unevenness; removing the texturing-inhibiting films; and forming a selective emitter on a surface of the wafer having the first surface unevenness and the second surface unevenness defined therein using a doping process.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: December 8, 2020
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Junsin Yi, Minkyu Ju, Young-Hyun Cho, Eun-Chel Cho, Youngkuk Kim, Kumar Mallem
  • METHOD FOR MANUFACTURING SELECTIVE EMITTER USING SURFACE STRUCTURE AND SOLAR CELL INCLUDING SELECTIVE EMITTER USING SURFACE STRUCTURE
    Publication number: 20200135944
    Abstract: Proposed is a method for manufacturing a selective emitter using a surface structure, the method includes: preparing a wafer; forming fine first surface unevenness in each of front and rear faces of the wafer; forming a texturing-inhibiting film on each of the front and rear faces of the wafer; partially patterning the front texturing-inhibiting film to expose a portion of the front face of the wafer; forming second surface unevenness in the exposed portion of the wafer, wherein the second surface unevenness has a roughness greater and deeper than a roughness of the first surface unevenness; removing the texturing-inhibiting films; and forming a selective emitter on a surface of the wafer having the first surface unevenness and the second surface unevenness defined therein using a doping process.
    Type: Application
    Filed: September 6, 2019
    Publication date: April 30, 2020
    Applicant: Research & Business Foundation Sungkyunkwan University
    Inventors: Junsin YI, Minkyu JU, Young-Hyun CHO, Eun-Chel CHO, Youngkuk KIM, Kumar MALLEM