Patents by Inventor Tae-Woo Lee

Tae-Woo Lee 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: 12286359
    Abstract: Disclosed is a perovskite light-emitting device with reduced defects in a perovskite thin film. The passivation layer in the perovskite light-emitting device is formed on the upper part of the perovskite thin film to eliminate defects in the perovskite nanocrystalline particles and resolve charge imbalance in the device, thereby improving maximum efficiency and maximum luminance of the light-emitting device.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: April 29, 2025
    Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Tae-Woo Lee, Jin Woo Park, Young-Hoon Kim, Sungjin Kim
  • Publication number: 20250127028
    Abstract: A light-emitting layer for a halide perovskite light-emitting device, a method for manufacturing the same and a perovskite light-emitting device using the same are disclosed. The light-emitting layer can be manufactured by forming a first nanoparticle thin film by coating, on a member, a solution comprising halide perovskite nanoparticles having a halide perovskite nanocrystalline structure. Thereby, a nanoparticle light emitter has therein a halide perovskite having a crystal structure in which FCC and BCC are combined; and can show high color purity. In addition, it is possible to improve the luminescence efficiency and luminance of a device by making perovskite as nanoparticles and then introducing the same into a light-emitting layer.
    Type: Application
    Filed: December 20, 2024
    Publication date: April 17, 2025
    Inventors: Tae-Woo LEE, Sanghyuk IM, Himchan CHO, Young-Hoon KIM
  • Patent number: 12249356
    Abstract: A heat-assisted magnetic recording head includes a near-field transducer, a waveguide, and a resonance enhancing feature. The near-field transducer is configured to focus and emit an optical near-field. The waveguide is configured to receive electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The resonance enhancing feature is disposed proximal to the near-field transducer and to a media-facing surface of the heat-assisted magnetic recording head. The resonance enhancing feature includes a first segment and a second segment disposed on opposite sides of the near-field transducer relative to a cross-track dimension of the heat-assisted magnetic recording head. Each of the first segment and the second segment of the resonance enhancing feature includes a liner and a filler. The liner of each of the first segment and the second segment at least partially faces the near-field transducer.
    Type: Grant
    Filed: December 5, 2023
    Date of Patent: March 11, 2025
    Assignee: Seagate Technology LLC
    Inventors: Tae-Woo Lee, YongJun Zhao
  • Patent number: 12241010
    Abstract: Disclosed are a perovskite color converter and a method for manufacturing the same. In order to maintain strong physical properties, the siloxane resin is synthesized in two steps. The silane precursor performs siloxane bond through a non-aqueous sol-gel reaction to form a siloxane resin, and a bond between methacrylate group, and a bond between methacrylate group and an organic ligand are formed through a secondary cross-linking reaction.
    Type: Grant
    Filed: November 5, 2021
    Date of Patent: March 4, 2025
    Assignees: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Tae-Woo Lee, Byeong-Soo Bae, Young-Hoon Kim, Jun-Ho Jang
  • Publication number: 20250043177
    Abstract: Provided are a perovskite nanocrystal particle light-emitter where an organic ligand is substituted, and optoelectronic devices using the same. A method for manufacturing a perovskite nanocrystal particle light-emitter where an organic ligand surrounding a perovskite nanocrystal is substituted may comprise steps of: preparing a solution including nanocrystal particle light-emitter, wherein the perovskite nanocrystal particle light-emitter comprises a perovskite nanocrystal structure and a plurality of first organic ligands surrounding the perovskite nanocrystal structure; and adding, to the solution, a second organic ligand which is shorter than the first organic ligands or includes a phenyl group or a fluorine group, thereby substitutes the first organic ligands with the second organic ligand.
    Type: Application
    Filed: October 21, 2024
    Publication date: February 6, 2025
    Inventors: Tae-Woo LEE, Sanghyuk IM, Young-Hoon KIM, Himchan CHO
  • Patent number: 12207543
    Abstract: A light-emitting layer for a halide perovskite light-emitting device, a method for manufacturing the same and a perovskite light-emitting device using the same are disclosed. The light-emitting layer can be manufactured by forming a first nanoparticle thin film by coating, on a member, a solution comprising halide perovskite nanoparticles having a halide perovskite nanocrystalline structure. Thereby, a nanoparticle light emitter has therein a halide perovskite having a crystal structure in which FCC and BCC are combined; and can show high color purity. In addition, it is possible to improve the luminescence efficiency and luminance of a device by making perovskite as nanoparticles and then introducing the same into a light-emitting layer.
    Type: Grant
    Filed: July 18, 2023
    Date of Patent: January 21, 2025
    Assignee: SN DISPLAY CO., LTD.
    Inventors: Tae-Woo Lee, Sanghyuk Im, Himchan Cho, Young-Hoon Kim
  • Patent number: 12198721
    Abstract: A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a near-field emitter configured to heat a surface of a magnetic disk, and a hybrid plasmonic disk. The hybrid plasmonic disk comprises a plasmonic region and a thermal region. The plasmonic region comprises a first material or alloy that is a plasmonic material or alloy. The thermal region comprises a second material or alloy that is different than the first material or alloy.
    Type: Grant
    Filed: November 29, 2023
    Date of Patent: January 14, 2025
    Assignee: Seagate Technology LLC
    Inventors: Yuhang Cheng, Tae-Woo Lee, Michael A. Seigler, Yang Wu
  • Publication number: 20240350800
    Abstract: Disclosed herein are a neuromorphic nerve device including an artificial proprioceptor device and an artificial synapse, and a neuromorphic prosthetic device using the same. The neuromorphic nerve device in accordance with the present disclosure is simple in structure, is drivable with low power, and excellent in stretchability, so that a robot made of a soft material similar to a human or an animal can be made, and a neuromorphic prosthetic device that is comfortable for a user to wear can be made possible.
    Type: Application
    Filed: April 20, 2023
    Publication date: October 24, 2024
    Applicants: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, The Board of Trustees of the Leland Stanford Junior University
    Inventors: Tae-Woo LEE, Yeongjun LEE, Zhenan BAO, Yuxin LIU
  • Patent number: 12122949
    Abstract: Provided are a method for manufacturing a perovskite nanocrystal particle light-emitter where an organic ligand is substituted, a light-emitter manufactured thereby, and a light emitting device using the same. A method for manufacturing an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter where an organic ligand is substituted may comprise the steps of: preparing a solution including an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter, wherein the organic-inorganic-hybrid perovskite nanocrystal particle light-emitter comprises an organic-inorganic-hybrid perovskite nanocrystal structure and a plurality of first organic ligands surrounding the organic-inorganic-hybrid perovskite nanocrystal structure; and adding, to the solution, a second organic ligand which is shorter than the first organic ligands or includes a phenyl group or a fluorine group, thereby substitutes the first organic ligands with the second organic ligand.
    Type: Grant
    Filed: May 9, 2022
    Date of Patent: October 22, 2024
    Assignee: SN DISPLAY CO., LTD.
    Inventors: Tae-Woo Lee, Sanghyuk Im, Young-Hoon Kim, Himchan Cho
  • Patent number: 12120899
    Abstract: Disclosed are a light emitting device including a perovskite charge transport layer and a method of manufacturing the same. Perovskite thin film of the light emitting device is prepared by co-depositing or sequentially depositing perovskite precursors. Perovskite is directly deposited on the substrate, the thickness of the perovskite thin film is easily controlled, and the energy level is easily adjusted. So, a charge transport layer functioning as a hole injection layer or an electron injection layer in the light emitting device may be manufactured to have suitable energy level.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: October 15, 2024
    Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Tae-Woo Lee, Young-Hoon Kim, Himchan Cho
  • Publication number: 20240255732
    Abstract: A lens module according to one embodiment of the present invention comprises N lenses sequentially arranged from an object side to an image side, wherein: the N lens comprise a plurality of first coated lenses in which a first coating is applied to at least one surface thereof, and a plurality of second coated lenses in which a second coating is applied to at least one surface thereof; the first coating and the second coating have different thicknesses; and, in the plurality of first coated lenses, the angle (?) between a line having a predetermined angle with respect to an optical axis and a normal line of a point in contact with the line on an object side surface is 50 degrees or higher.
    Type: Application
    Filed: May 31, 2022
    Publication date: August 1, 2024
    Inventors: Tae Woo LEE, Jin Young KIM, Yang Hyun JOO
  • Publication number: 20240215280
    Abstract: The present inventive concept relates to an in situ core/shell perovskite nanocrystal film formed by an in situ nanocrystal synthesis process, a method for producing the same, and a light emitting device comprising the same as a light-emitting layer. The in situ core/shell perovskite nanocrystal film formed by the in situ nanocrystal synthesis process according to the present inventive concept exhibits a strong charge confinement effect by nanocrystal formation, and can simultaneously greatly improve the luminescence efficiency and lifetime by maintaining the fast charge transport capability of polycrystalline perovskite.
    Type: Application
    Filed: January 22, 2024
    Publication date: June 27, 2024
    Inventors: Tae-Woo LEE, Joo Sung KIM
  • Publication number: 20240199947
    Abstract: The present disclosure relates to a perovskite light-emitting composition, and a method for preparing the same. The method for producing the perovskite light-emitting composition of the present disclosure includes an organic siloxane solvent having very high hydrophobicity and low surface tension as a synthesis solvent, thereby having a large surface tension difference from the perovskite light-emitting particles containing an organic ligand. Through these properties, a dense organic ligand can be attached to the surface of the perovskite nanoparticles, and perovskite light-emitting particles having a high ligand density can be prepared. Accordingly, the perovskite light-emitting particles prepared by the method of the present disclosure have improved dispersion stability, light-emitting properties and long-term storage stability.
    Type: Application
    Filed: March 31, 2022
    Publication date: June 20, 2024
    Inventors: Tae-Woo LEE, Seung-Chul LEE, Song-Hee LEE, Sinil CHOI, Jae Il KIM
  • Publication number: 20240158692
    Abstract: The present inventive concept relates to an in situ core/shell perovskite nanocrystal film formed by an in situ nanocrystal synthesis process, a method for producing the same, and a light emitting device comprising the same as a light-emitting layer. The in situ core/shell perovskite nanocrystal film formed by the in situ nanocrystal synthesis process according to the present inventive concept exhibits a strong charge confinement effect by nanocrystal formation, and can simultaneously greatly improve the luminescence efficiency and lifetime by maintaining the fast charge transport capability of polycrystalline perovskite.
    Type: Application
    Filed: October 11, 2023
    Publication date: May 16, 2024
    Inventors: Tae-Woo LEE, Joo Sung KIM
  • Publication number: 20240155857
    Abstract: Provided are a perovskite optoelectronic device containing an exciton buffer layer, and a method for manufacturing the same. The optoelectronic device of the present inventive concept comprises: an exciton buffer layer in which a first electrode, a conductive layer disposed on the first electrode and comprising a conductive material, and a surface buffer layer containing fluorine-based material having lower surface energy than the conductive material are sequentially deposited; a photoactive layer disposed on the exciton buffer layer and containing a perovskite photoactive layer; and a second electrode disposed on the photoactive layer. Accordingly, a perovskite is formed with a combined FCC and BSS crystal structure in a nanoparticle photoactive layer. The present inventive concept can also form a lamellar or layered structure in which an organic plane and an inorganic plane are alternatively deposited; and an exciton can be bound by the inorganic plane, thereby being capable of expressing high color purity.
    Type: Application
    Filed: December 22, 2023
    Publication date: May 9, 2024
    Inventors: Tae-Woo LEE, Sanghyuk IM, Himchan CHO, Young-Hoon KIM
  • Publication number: 20240096369
    Abstract: A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a near-field emitter configured to heat a surface of a magnetic disk, and a hybrid plasmonic disk. The hybrid plasmonic disk comprises a plasmonic region and a thermal region. The plasmonic region comprises a first material or alloy that is a plasmonic material or alloy. The thermal region comprises a second material or alloy that is different than the first material or alloy.
    Type: Application
    Filed: November 29, 2023
    Publication date: March 21, 2024
    Inventors: Yuhang Cheng, Tae-Woo Lee, Michael A. Seigler, Yang Wu
  • Patent number: 11925040
    Abstract: An image sensor pixel includes a substrate having a pixel electrode on a light receiving surface thereof, and a photoelectric conversion layer including a perovskite material, on the pixel electrode. A transparent electrode is provided on the photoelectric conversion layer, and a vertical electrode is provided, which is electrically connected to the pixel electrode and extends at least partially through the substrate. The photoelectric conversion layer includes a perovskite layer, a first blocking layer extending between the pixel electrode and the perovskite layer, and a second blocking layer extending between the transparent electrode and the perovskite layer.
    Type: Grant
    Filed: April 26, 2022
    Date of Patent: March 5, 2024
    Assignees: Samsung Electronics Co., Ltd., Seoul National University R&DB Foundation
    Inventors: Seung Hyeon Jo, Taeyon Lee, Tae-Woo Lee
  • Patent number: 11900963
    Abstract: A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a near-field emitter configured to heat a surface of a magnetic disk, and a hybrid plasmonic disk. The hybrid plasmonic disk comprises a plasmonic region and a thermal region. The plasmonic region comprises a first material or alloy that is a plasmonic material or alloy. The thermal region comprises a second material or alloy that is different than the first material or alloy.
    Type: Grant
    Filed: June 16, 2022
    Date of Patent: February 13, 2024
    Assignee: Seagate Technology LLC
    Inventors: Yuhang Cheng, Tae-Woo Lee, Michael A Seigler, Yang Wu
  • Patent number: 11877460
    Abstract: Provided are a perovskite optoelectronic device containing an exciton buffer layer, and a method for manufacturing the same. The optoelectronic device of the present invention comprises: an exciton buffer layer in which a first electrode, a conductive layer disposed on the first electrode and comprising a conductive material, and a surface buffer layer containing fluorine-based material having lower surface energy than the conductive material are sequentially deposited; a photoactive layer disposed on the exciton buffer layer and containing a perovskite photoactive layer; and a second electrode disposed on the photoactive layer. Accordingly, a perovskite is formed with a combined FCC and BSS crystal structure in a nanoparticle photoactive layer. The present invention can also form a lamellar or layered structure in which an organic plane and an inorganic plane are alternatively deposited; and an exciton can be bound by the inorganic plane, thereby being capable of expressing high color purity.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: January 16, 2024
    Inventors: Tae-Woo Lee, Sanghyuk Im, Himchan Cho, Young-Hoon Kim
  • Patent number: D1051481
    Type: Grant
    Filed: November 2, 2022
    Date of Patent: November 12, 2024
    Assignee: TANGRAM FACTORY, INC.
    Inventors: Sung Kyou Woo, Sang Hyun Kang, Tae Woo Lee