公开(公告)号：US20210257573A1

公开(公告)日：2021-08-19

申请号：US17171893

申请日：2021-02-09

Applicant: Samsung Display Co., Ltd. ,  Research & Business Foundation SUNGKYUNKWAN UNIVERSITY

Inventor： MINKI NAM ,  SUNGWOON KIM ,  YUNHYUK KO ,  Wan Ki BAE ,  SOOHO LEE ,  Byeong Guk JEONG ,  YUNKU JUNG

IPC: H01L51/50 ,  C09K11/88 ,  C09K11/08

Abstract: A quantum dot includes a core and a plurality of shell layers surrounding the core. The core has a band gap less than that of the outermost shell layer, and the outermost shell layer has a band gap less than that of a second shell layer. Thus, a light emitting device including the quantum dot according to an embodiment may have an improved lifespan of the device and excellent luminous efficiency characteristics.

公开(公告)号：US20240414933A1

公开(公告)日：2024-12-12

申请号：US18442156

申请日：2024-02-15

Applicant: Samsung Display Co., LTD. ,  Seoul National University R&DB Foundation

Inventor： YUNHYUK KO ,  CHANGHEE LEE ,  Harkjune LEE ,  Kookheon CHAR

IPC: H10K50/115 ,  H10K50/15 ,  H10K50/16 ,  H10K102/00

Abstract: A method of observing Auger recombination of quantum dots in an Electron-Only Device (EOD) including preparing an EOD device, wherein the EOD device includes quantum dots, applying a current to the EOD device and observing negative trions formed in the EOD device. Additionally, a method of observing Auger recombination of quantum dots in a Hole-Only Device (HOD) including preparing an HOD device, wherein the HOD device includes quantum dots, applying a current to the HOD device and observing positive trions formed in the HOD device.

公开(公告)号：US20240268218A1

公开(公告)日：2024-08-08

申请号：US18516015

申请日：2023-11-21

Applicant: Samsung Display Co., Ltd.

Inventor： SOOHO LEE ,  Jungho JO ,  YUNHYUK KO ,  Yun Ku JUNG

IPC: H10K85/30 ,  C07F3/06

CPC classification number: H10K85/381 ,  C07F3/06 ,  H10K50/16

Abstract: A metal oxide nanoparticle includes a compound represented by Chemical Formula 1 and an alkyl amine ligand having 8 to 18 carbon atoms positioned on a surface of the compound.




In Chemical Formula 1, M may be one selected from among Ca, Zr, Al, Li, Mg, Ni, Y, W, Co, and Ga.

公开(公告)号：US20250127033A1

公开(公告)日：2025-04-17

申请号：US18827400

申请日：2024-09-06

Applicant: Samsung Display Co., Ltd.

Inventor： Jungho JO ,  YUNKU JUNG ,  MYOUNGJIN PARK ,  YUNHYUK KO ,  DONGWOO SHIN

IPC: H10K85/30 ,  H10K50/115 ,  H10K71/15

Abstract: A light emitting element may include a first electrode, an electron transport region on the first electrode and including metal nanoparticles, an emission layer on the electron transport region and including quantum dots, a hole transport region on the emission layer, and a second electrode disposed on the hole transport region. The metal nanoparticle may include a core including a metal oxide composed of zinc (Zn), magnesium (Mg), oxygen (O) and a first component, and a ligand bonded to the core and derived from an ionic compound represented by Formula 1. The first component may include sodium (Na) or lithium (Li). Accordingly, the light emitting element of an embodiment may show high efficiency and long lifetime.

公开(公告)号：US20240199949A1

公开(公告)日：2024-06-20

申请号：US18535254

申请日：2023-12-11

Applicant: Samsung Display Co., LTD.

Inventor： SOOHO LEE ,  YUNHYUK KO ,  Seonhui BAEK

IPC: C09K11/06 ,  H10K50/115

CPC classification number: C09K11/06 ,  H10K50/115 ,  H10K50/16

Abstract: A light-emitting device includes a first electrode, an electron transport layer disposed on the first electrode, a light-emitting layer disposed on the electron transport layer, a hole transport layer disposed on the light-emitting layer, and a second electrode disposed on the hole transport layer. The light-emitting layer includes quantum dots, and metal thiolate carboxylate ligands are disposed on surfaces of the quantum dots.

公开(公告)号：US20250063885A1

公开(公告)日：2025-02-20

申请号：US18750963

申请日：2024-06-21

Applicant: Samsung Display Co., LTD.

Inventor： YUNKU JUNG ,  SOOHO LEE ,  Jungho JO ,  Chang Yeol HAN ,  YUNHYUK KO ,  SEHUN KIM

IPC: H10K50/16 ,  C09D11/037 ,  C09K11/06 ,  H10K50/115 ,  H10K50/165 ,  H10K85/30

Abstract: A light emitting element of an embodiment includes a first electrode, a hole transport region on the first electrode, an emission layer on the hole transport region, an electron transport region on the emission layer, and a second electrode on the electron transport region, the electron transport region includes a nanoparticle including a nanoparticle core and a ligand, the nanoparticle core includes a core compound represented by Formula 1, and the ligand is bonded to the surface of the nanoparticle core and represented by Formula 2 or Formula 3.

公开(公告)号：US20240324271A1

公开(公告)日：2024-09-26

申请号：US18437361

申请日：2024-02-09

Applicant: Samsung Display Co., LTD.

Inventor： Yun Ku JUNG ,  YUNHYUK KO ,  WON-JUN PARK ,  CHUL SOON PARK ,  JONGWOO SHIN ,  Jungho JO

IPC: H10K50/16 ,  C09D11/52 ,  H10K50/11 ,  H10K71/15

CPC classification number: H10K50/166 ,  C09D11/52 ,  H10K50/11 ,  H10K71/15

Abstract: An ink composition includes a first solvent, a second solvent, a first electron transport material and a second electron transport material. The first electron transport material includes a metal oxide, and a ligand disposed on a surface of the metal oxide. The second electron transport material includes a metal oxide, and a ligand positioned on a surface of the metal oxide. The ligand of the first electron transport material and the ligand of the second electron transport material are different from each other. A difference in a length of the ligand of the first electron transport material and a length of the ligand of the second electron transport material is three or more atoms.