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：US20250075124A1

公开(公告)日：2025-03-06

申请号：US18796960

申请日：2024-08-07

Applicant: Samsung Display Co., Ltd.

Inventor： Jungho JO ,  SANGYEOP LEE ,  SOOHO LEE ,  YUNKU JUNG ,  Chang Yeol HAN

IPC: C09K11/66 ,  B82Y30/00 ,  C09D11/38 ,  C09K11/02 ,  H10K50/115 ,  H10K50/16 ,  H10K50/17 ,  H10K102/00

Abstract: A light-emitting element includes a first electrode, a functional layer disposed on the first electrode, and a second electrode disposed on the functional layer, wherein the functional layer includes a nanoparticle, the nanoparticle includes a core and a ligand, the core includes at least one of a first core compound represented by Formula 1 below, a second core compound represented by Formula 2 below, or a third core compound represented by Formula 3 below, and thus the light-emitting element has improved lifespan and efficiency. Sn4+1-xSn2+xO2-x  Formula 1 Sn4+1-yCu+2yO2-y  Formula 2 Sn4+1-zNi2+zO2-z  Formula 3

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：US20250133950A1

公开(公告)日：2025-04-24

申请号：US18782389

申请日：2024-07-24

Applicant: Samsung Display Co., Ltd.

Inventor： YUNKU JUNG ,  SANGYEOP LEE ,  WON-JUN PARK ,  CHUL SOON PARK ,  JONGWOO SHIN ,  Jungho JO

IPC: H10K85/30 ,  C09K11/06 ,  H10K50/15 ,  H10K50/16 ,  H10K71/10

Abstract: Embodiments provide a light emitting element that includes a first electrode, a second electrode disposed on the first electrode, an emission layer disposed between the first electrode and the second electrode and including quantum dots, a hole transport region disposed between the first electrode and the second electrode, and an electron transport region disposed between the first electrode and the second electrode, wherein the emission layer is disposed between the hole transport region and the electron transport region. At least one of the hole transport region and the electron transport region includes metal nanoparticles. The metal nanoparticles include a core containing a metal oxide, and a ligand bonded to the core, wherein the ligand includes an alkoxy group. The alkoxy group is derived from an oxygen-containing compound represented by Formula 1, which is explained in the specification.

公开(公告)号：US20220216441A1

公开(公告)日：2022-07-07

申请号：US17450130

申请日：2021-10-06

Applicant: Samsung Display Co., Ltd.

Inventor： YUNKU JUNG ,  HYEKYOUNG CHOI

IPC: H01L51/50 ,  H01L51/56 ,  H01L51/00

Abstract: A method of manufacturing a light-emitting element includes forming a first electrode, forming a hole transport region by providing a hole transport material on the first electrode, forming a light-emitting layer on the hole transport region, forming an electron transport region on the light-emitting layer, and forming a second electrode on the electron transport region, wherein the forming of the light-emitting layer includes providing, on the hole transport region, a quantum dot composition including an organic solvent and a plurality of quantum dots, heat-treating the quantum dot composition, and vacuum-drying the heat-treated quantum dot composition, so that a light-emitting element in which quantum dots have infiltrated into the hole transport region may be manufactured.

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：US20240276868A1

公开(公告)日：2024-08-15

申请号：US18532579

申请日：2023-12-07

Applicant: Samsung Display Co., LTD.

Inventor： Jungho JO ,  CHUL SOON PARK ,  YUNKU JUNG ,  WON-JUN PARK ,  JONGWOO SHIN

IPC: H10K85/30 ,  H10K50/115 ,  H10K71/13

CPC classification number: H10K85/381 ,  H10K50/115 ,  H10K71/135 ,  H10K50/15 ,  H10K50/16

Abstract: A light emitting element includes a first electrode, an electron transport region, an emission layer, a hole transport region, and a second electrode, stacked in order. At least one among the electron transport region and the hole transport region includes a metal nanoparticle. The metal nanoparticle includes a core including a metal oxide and a ligand bonded to the core and including at least one among Se and Te. The ligand is derived from a first compound represented by Formula 1 or an ion represented by Formula 2 as described. Accordingly, the light emitting element may be manufactured by an inkjet printing method.

公开(公告)号：US20230111888A1

公开(公告)日：2023-04-13

申请号：US17889236

申请日：2022-08-16

Applicant: Samsung Display Co., Ltd.

Inventor： HYEKYOUNG CHOI ,  YUNKU JUNG ,  SUNGWOON KIM

IPC: C09K11/02 ,  H01L51/00 ,  H01L51/50

Abstract: A quantum dot composite includes: a quantum dot; and a ligand bonded to a surface of the quantum dot, wherein a plurality of binding portions to which the ligand is bonded are provided on the surface of the quantum dot, wherein the binding portions include: a first binding portion in which cations are exposed; a second binding portion in which anions are exposed; and a third binding portion in which the cations and the anions are bonded to each other and exposed, and the ligand includes: a first ligand bonded to the first binding portion; a second ligand bonded to the second binding portion; and a third ligand bonded to the third binding portion. Accordingly, a light emitting diode including the quantum dot composite of an embodiment as a light emitting material may have increased luminous efficiency.

公开(公告)号：US20220195289A1

公开(公告)日：2022-06-23

申请号：US17451602

申请日：2021-10-20

Applicant: Samsung Display Co., Ltd.

Inventor： JAEKOOK HA ,  YUNKU JUNG

IPC: C09K11/02 ,  H01L51/50 ,  H01L27/32

Abstract: A quantum dot composition according to one or more embodiments includes a quantum dot, a first ligand including a first head portion bonded to a surface of the quantum dot and a first tail portion having a crosslinkable functional group at a terminal of the first ligand, and a second ligand bonded to the surface of the quantum dot and being shorter in length than the first ligand. A quantum dot composition according to one or more embodiments is applied to a light-emitting element and a display device, and thus, it is possible to improve a luminous efficiency and element lifespan of the light-emitting element and the display device.