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：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.