公开(公告)号：US11718786B2

公开(公告)日：2023-08-08

申请号：US17675459

申请日：2022-02-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Tae Hyung Kim ,  Kwanghee Kim ,  Eun Joo Jang ,  Dae Young Chung ,  Sujin Park

IPC: C09K11/02 ,  C09K11/88 ,  C09K11/56 ,  C09K11/70 ,  H01L33/06 ,  B82Y40/00 ,  B82Y20/00 ,  H10K50/115

CPC classification number: C09K11/025 ,  C09K11/562 ,  C09K11/565 ,  C09K11/70 ,  C09K11/703 ,  C09K11/883 ,  H01L33/06 ,  B82Y20/00 ,  B82Y40/00 ,  H10K50/115

Abstract: Quantum dots including semiconductor nanocrystals, methods of producing the same, and quantum dot solutions and electronic devices including the same. The quantum dots do not include cadmium, lead, or a combination thereof. The quantum dots include an organic ligand and a halogen on the surfaces, and the quantum dots are dispersible in an organic solvent to form organic solutions.

公开(公告)号：US11424425B2

公开(公告)日：2022-08-23

申请号：US17062162

申请日：2020-10-02

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sujin Park ,  Yuho Won ,  Eun Joo Jang ,  Dae Young Chung ,  Sung Woo Kim ,  Jin A Kim ,  Yong Seok Han

IPC: H01L51/50 ,  H01L51/00

Abstract: An electroluminescent device includes a first electrode and a second electrode facing each other; a hole transport layer between the first electrode and the second electrode; a light emitting layer including a first light emitting layer disposed between the hole transport layer and the second electrode and including a first quantum dot and a second light emitting layer between the first light emitting layer and the second electrode and including a second quantum dot; and an electron transport layer between the light emitting layer and the second electrode. Each of the first and second light emitting layers emits first light, each of the first and second quantum dots has a core-shell structure including one or more shells, and the first and second quantum dots have different numbers of shells from each other or have different total thicknesses of the one or more shells from each other.

公开(公告)号：US10446782B1

公开(公告)日：2019-10-15

申请号：US16104967

申请日：2018-08-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Moon Gyu Han ,  Dae Young Chung ,  Hongkyu Seo ,  Kwanghee Kim ,  Kun Su Park ,  Sujin Park ,  Eun Joo Jang

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

Abstract: A quantum dot device includes a first electrode and a second electrode facing each other, a quantum dot layer disposed between the first electrode and the second electrode and comprising a plurality of quantum dots, a first charge auxiliary layer disposed between the first electrode and the quantum dot layer and contacting the quantum dot layer, and a second charge auxiliary layer disposed between the second electrode and the quantum dot layer and contacting the quantum dot layer, wherein the plurality of quantum dots includes a quantum dot including an organic ligand on a surface thereof, the organic ligand including a hydrophilic functional group at a terminal end.