公开(公告)号：US11917905B2

公开(公告)日：2024-02-27

申请号：US16997770

申请日：2020-08-19

Applicant: Samsung Display Co., Ltd.

Inventor： Hyunmi Doh ,  Jaehoon Kim ,  Jaehong Park

IPC: H01L51/00 ,  H10K85/60 ,  C09K11/70 ,  H10K50/15 ,  H10K50/17 ,  H10K50/115

CPC classification number: H10K85/633 ,  C09K11/70 ,  H10K85/636 ,  H10K50/115 ,  H10K50/15 ,  H10K50/17 ,  H10K85/615 ,  H10K85/6572

Abstract: A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the interlayer includes i) a hole transport region between the first electrode and the emission layer, and ii) an electron transport region between the emission layer and the second electrode, and the hole transport region includes a Group 11 metal chalcogenide compound including a Group 11 metal and a chalcogenide element with the proviso that oxygen is excluded from the chalcogenide element.

公开(公告)号：US11895856B2

公开(公告)日：2024-02-06

申请号：US16895590

申请日：2020-06-08

Applicant: Samsung Display Co., Ltd.

Inventor： Yunku Jung ,  Minki Nam ,  Hyunmi Doh ,  Yunhyuk Ko ,  Sungwoon Kim ,  Jaehoon Kim ,  Myoungjin Park ,  Jae Hong Park ,  Junwoo Park

IPC: C09K11/06 ,  C09K11/02 ,  C09K11/54 ,  C09K11/56 ,  H10K50/115 ,  H10K50/00 ,  H10K50/12 ,  H10K50/844 ,  H10K50/86 ,  H10K59/38 ,  H10K71/00 ,  H10K85/30 ,  H10K85/60 ,  H10K102/10 ,  H10K102/00

CPC classification number: H10K50/115 ,  C09K11/06 ,  H10K50/00 ,  H10K50/12 ,  H10K50/844 ,  H10K50/865 ,  H10K59/38 ,  H10K71/00 ,  H10K85/30 ,  H10K85/631 ,  C09K2211/18 ,  H10K2102/103 ,  H10K2102/351

Abstract: A quantum dot composition includes a quantum dot, a ligand to bind to a surface of the quantum dot, an additive having an amine group, and a precursor comprising an organometallic compound, the composition forming a modified quantum dot having a reformed surface characteristic. A light emitting element including the modified quantum dot may have improved lifespan, luminous efficiency, and material stability.

公开(公告)号：US11667834B2

公开(公告)日：2023-06-06

申请号：US17198752

申请日：2021-03-11

Applicant: Samsung Display Co., Ltd.

Inventor： Changhee Lee ,  Sehun Kim ,  Hyojin Ko ,  Dukki Kim ,  Jaehoon Kim ,  Hyunmi Doh ,  Yunku Jung ,  Jaekook Ha

IPC: H10K50/115 ,  H10K71/00 ,  C09K11/02 ,  H01L51/50 ,  H01L51/56 ,  B82Y40/00 ,  B82Y20/00

CPC classification number: C09K11/025 ,  H01L51/502 ,  H01L51/56 ,  B82Y20/00 ,  B82Y40/00

Abstract: A method for manufacturing a light emitting element includes: forming a first electrode; forming a hole transport region on a first electrode; forming an emission layer on the hole transport region; forming an electron transport region on the emission layer; and forming a second electrode on the electron transport region, wherein the forming of the emission layer includes providing a quantum dot composition containing a quantum dot and a ligand bonded to a surface of the quantum dot, to form a preliminary emission layer; and increasing the layer density of the preliminary emission layer by about 5% or greater, thereby improving a luminous efficiency of the light emitting element.