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：US20220344588A1

公开(公告)日：2022-10-27

申请号：US17697663

申请日：2022-03-17

Applicant: Samsung Display Co., Ltd.

Inventor： SANGHEE YU ,  GYUBONG KIM ,  HOI-LIM KIM ,  SUNGWOON KIM ,  HYUNMI DOH ,  JAE HONG PARK ,  SEIHWAN AHN

IPC: H01L51/00 ,  C09K11/02

Abstract: An electron transport composition includes a metal oxide and a photoacid generator, wherein the photoacid generator has at least one of a halogenated triazine-based compound or an oxime sulfonate-based compound. When the electron transport composition is applied to a light-emitting element, the light-emitting element may exhibit improved luminous efficiency characteristics and element lifespan characteristics.

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：US20220123060A1

公开(公告)日：2022-04-21

申请号：US17354210

申请日：2021-06-22

Applicant: Samsung Display Co., Ltd.

Inventor： JINGOO KANG ,  SUNGWOON KIM ,  CHANGHEE LEE

IPC: H01L27/32 ,  H01L51/56

Abstract: A display device including a first light emitting element including a first emission layer and a first charge transport layer adjacent to the first emission layer, the first emission layer including a first quantum dot to emit first light, and a second light emitting element including a second emission layer and a second charge transport layer adjacent to the second emission layer, the second emission layer including a second quantum dot to emit second light that is longer in wavelength than the first light. The first charge transport layer includes a first metal oxide. The second charge transport layer includes a second metal oxide different from the first metal oxide.

公开(公告)号：US20210091324A1

公开(公告)日：2021-03-25

申请号：US16892532

申请日：2020-06-04

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yunku JUNG ,  Hyunmi DOH ,  JAE HONG PARK ,  Dongwoo SHIN ,  Jaekook HA ,  SUNGWOON KIM ,  MINKI NAM

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/00 ,  C09K11/06

Abstract: A quantum dot composition includes a quantum dot, and a ligand bonded to a surface of the quantum dot, wherein the ligand includes a body part including a charge transport moiety, and a head part bonded to the surface of the quantum dot. The quantum dot composition according may be applied to a light emitting diode and a display device to provide increased luminous efficiency and device life of the light emitting diode and the display device.