公开(公告)号：US20230320117A1

公开(公告)日：2023-10-05

申请号：US18155965

申请日：2023-01-18

Applicant: Samsung Display Co., Ltd.

Inventor： Yunku Jung ,  Yunhyuk Ko ,  Changyeol Han

IPC: H10K50/115 ,  C09K11/88

CPC classification number: H10K50/115 ,  C09K11/883 ,  H10K50/16

Abstract: A light-emitting device including: a first electrode; a second electrode facing the first electrode; and an interlayer located between the first electrode and the second electrode, wherein the interlayer includes an emission layer, and wherein the emission layer includes a first quantum dot and a second quantum dot, wherein an energy band gap of the first quantum dot is greater than an energy band gap of the second quantum dot, and wherein the first quantum dot emits light of a partial wavelength region of a visible light region.

公开(公告)号：US20230320116A1

公开(公告)日：2023-10-05

申请号：US18128965

申请日：2023-03-30

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

Inventor： Yunhyuk Ko ,  Changhee Lee ,  Youngsik Kim ,  Taewan Kim ,  Sohee Jeong ,  Eunhye Cho ,  Mahnmin Choi

IPC: H10K50/115 ,  H01L33/50 ,  B82Y30/00 ,  B82Y40/00 ,  C09K11/06

CPC classification number: H10K50/115 ,  H01L33/502 ,  B82Y30/00 ,  B82Y40/00 ,  C09K11/06 ,  C09K2211/188

Abstract: A method of preparing quantum dot includes: forming a first mixture comprising a core, a zinc-containing first material, and a selenium-containing second material; forming a first intermediate comprising a core and a first shell, from the first mixture, followed by forming a second mixture comprising the first intermediate; forming a third mixture by adding a zinc-containing third material and a sulfur-containing fourth material to the second mixture; forming a second intermediate comprising the core, the first shell, and a second shell, from the third mixture, followed by forming a fourth mixture comprising the second intermediate; adding a ligand precursor-containing fifth material to the fourth mixture; and forming a ligand layer covering the second shell of the second intermediate, wherein an amount of the ligand precursor is in a range of about 10 pbw to about 22 pbw based on 100 pbw of the zinc-containing third material in the fourth mixture.

公开(公告)号：US11649402B2

公开(公告)日：2023-05-16

申请号：US17034861

申请日：2020-09-28

Applicant: Samsung Display Co., Ltd. ,  Hannam University Institute for Industry-Academia Cooperation

Inventor： Yunhyuk Ko ,  Kwangsup Lee ,  Prabhakaran Prem ,  Changhee Lee ,  Gyeongju Kim ,  Sinil Choi

IPC: C09K11/88 ,  C09K11/54 ,  H01L51/50 ,  H01L33/50 ,  B82Y40/00 ,  B82Y20/00

CPC classification number: C09K11/88 ,  C09K11/54 ,  H01L33/502 ,  H01L51/5036 ,  B82Y20/00 ,  B82Y40/00

Abstract: A method of preparing a quantum dot, a quantum dot prepared by the method, an optical member including the quantum dot, and an apparatus including the quantum dot. The quantum dot may include: a core including a III-V compound; a first shell surrounding the core and including ZnSe; a second shell surrounding the first shell and including ZnSe1-xSx, wherein x may be a real number greater than 0 and smaller than 1; and a third shell surrounding the second shell and including ZnS. The method may include: forming the first shell from a first material including zinc and a second material including selenium in a solution; forming the second shell by adding to the solution a third material including zinc and a fourth material including selenium and sulfur; and forming the third shell by adding to the solution a fifth material including zinc.