公开(公告)号：US20240164130A1

公开(公告)日：2024-05-16

申请号：US18535417

申请日：2023-12-11

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: H10K50/115 ,  C09K11/06 ,  H10K50/00 ,  H10K50/12 ,  H10K50/844 ,  H10K50/86 ,  H10K59/38 ,  H10K71/00 ,  H10K85/30 ,  H10K85/60

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

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：US20210214610A1

公开(公告)日：2021-07-15

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 ,  H01L33/50 ,  H01L51/50

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.

公开(公告)号：US20210189233A1

公开(公告)日：2021-06-24

申请号：US16937088

申请日：2020-07-23

Applicant: Samsung Display Co., Ltd.

Inventor： Yunku JUNG ,  Yunhyuk KO ,  Minki NAM ,  Sooho LEE

IPC: C09K11/02 ,  H01L33/06 ,  C09K11/88

Abstract: A method for producing a quantum dot composition includes providing a preliminary quantum dot composition containing a quantum dot to which a ligand is bonded and a free ligand, providing an adsorbent to the preliminary quantum dot composition, adsorbing the free ligand to the adsorbent, and removing a modified adsorbent to which the free ligand is adsorbed to provide a purified quantum dot composition. A light emitting element including the purified quantum dot composition may have superior luminous efficiency.

公开(公告)号：US20210376193A1

公开(公告)日：2021-12-02

申请号：US17331510

申请日：2021-05-26

Applicant: Samsung Display Co., Ltd.

Inventor： Yunhyuk KO ,  Changhee LEE ,  Yunku JUNG ,  Dukki KIM ,  Jongwon PARK ,  Jaekook HA

IPC: H01L33/32 ,  H01L33/04 ,  H01L33/00

Abstract: Provided are a light-emitting device, a method of preparing the light-emitting device, an ink composition including the light-emitting device, and an apparatus including the light-emitting device. The light-emitting device may include: a semiconductor region including a first semiconductor layer, a second semiconductor layer, and an active layer between the first semiconductor layer and the second semiconductor layer; a first protective layer on at least one portion of a surface of the semiconductor region and including a Group III-V compound; and a second protective layer on the first protective layer and including a metal oxide.

公开(公告)号：US20210226093A1

公开(公告)日：2021-07-22

申请号：US16943829

申请日：2020-07-30

Applicant: Samsung Display Co., Ltd.

Inventor： Yunku JUNG ,  Changhee LEE ,  Yunhyuk KO ,  Dukki KIM ,  Jongwon PARK ,  Jaekook HA

IPC: H01L33/26 ,  H01L25/075

Abstract: A light-emitting device (LED) includes a first semiconductor layer, a second semiconductor layer facing the first semiconductor layer, an insulating layer arranged to at least partially surround outer surfaces of the first semiconductor layer and the second semiconductor layer, and a first ligand bonded to a surface of the insulating layer and a second ligand bonded to the first ligand.

公开(公告)号：US20210074939A1

公开(公告)日：2021-03-11

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: H01L51/50 ,  H01L27/32 ,  H01L51/52 ,  H01L51/56 ,  H01L51/00 ,  C09K11/06

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：US20240052239A1

公开(公告)日：2024-02-15

申请号：US18344540

申请日：2023-06-29

Applicant: Samsung Display Co., Ltd.

Inventor： Jungho JO ,  Yunhyuk KO ,  Yunku JUNG ,  Changyeol HAN

IPC: C09K11/62 ,  H10K50/115 ,  C09K11/58 ,  C09K11/02

CPC classification number: C09K11/621 ,  H10K50/115 ,  C09K11/586 ,  C09K11/02 ,  H10K2102/331

Abstract: A quantum dot may include a core including indium (In) and A1, and a first shell covering the core, wherein A1 may be a group III element other than indium, a ratio of a radius of the core to a thickness of the first shell may be in a range of about 1:1 to about 9:1, and the quantum dot may emit blue light having a maximum emission wavelength in a range of about 440 nanometers (nm) to about 480 nm.

公开(公告)号：US20230323203A1

公开(公告)日：2023-10-12

申请号：US18132896

申请日：2023-04-10

Applicant: Samsung Display Co., Ltd.

Inventor： Changyeol Han ,  Yunhyuk KO ,  Yunku Jung

IPC: C09K11/88 ,  H01L33/50

CPC classification number: C09K11/883 ,  H01L33/502 ,  B82Y20/00

Abstract: A method of preparing a quantum dot, an optical member including the quantum dot prepared using the method, and an electronic device including the quantum dot are provided. The method includes forming a first particle including a core and a protective shell from a quantum dot composition including a precursor containing a tellurium (Te) element, a precursor containing a Group II element, and a precursor containing a Group VI element; purifying the first particle; and forming a second particle including a first shell by mixing the first particle with a first shell composition including the precursor containing a Group II element and the precursor containing a Group VI element and forming the first shell from the protective shell.

公开(公告)号：US20210296605A1

公开(公告)日：2021-09-23

申请号：US17107411

申请日：2020-11-30

Applicant: Samsung Display Co., Ltd.

Inventor： Junwoo PARK ,  Myoungjin PARK ,  Sooho LEE ,  Yunhyuk KO ,  Sungwoon KIM ,  Minki NAM ,  Jaekook HA

IPC: H01L51/50

Abstract: A light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode and including quantum dots; a hole transport region between the first electrode and the emission layer; and an electron sink layer between the emission layer and the hole transport region and including an electron transport material, wherein the electron transport material includes a metal, a metal oxide, a metal-containing material, or any combination thereof.

公开(公告)号：US20250056958A1

公开(公告)日：2025-02-13

申请号：US18632190

申请日：2024-04-10

Applicant: Samsung Display Co., LTD.

Inventor： Yun Ku JUNG ,  Yunhyuk KO ,  Won-Jun PARK ,  Chul Soon PARK ,  Seonhui BAEK ,  Sooho LEE ,  Jungho JO ,  Chang Yeol HAN

IPC: H10K50/115 ,  B82Y40/00 ,  C09K11/02 ,  C09K11/88

Abstract: A quantum dot complex according to an embodiment comprises a quantum dot; and a ligand bound to a surface of the quantum dot, wherein the surface of the quantum dot is provided with a plurality of coupling parts to which the ligand is bound; wherein the plurality of coupling parts include a first coupling part and a second coupling part. The ligand includes a first ligand bound to the first coupling part and a second ligand bound to the second coupling part, wherein the second ligand includes a halogen element. The halogen element is contained in an amount of 1 at % to 12 at % to the total content of the quantum dot complex.