公开(公告)号：US20250084307A1

公开(公告)日：2025-03-13

申请号：US18825620

申请日：2024-09-05

Applicant: Samsung Display Co., LTD.

Inventor： Youngsik KIM ,  Sungjae KIM ,  Bitna YOON ,  Donghee LEE ,  Taekjoon LEE ,  Junehyuk JUNG

IPC: C09K11/62 ,  B82Y20/00 ,  B82Y40/00 ,  C09K11/02 ,  H10K59/38

Abstract: A quantum dot includes a core including copper, indium, gallium, silver, and sulfur and a shell surrounding the core and including zinc sulfide (ZnS). A display device includes: a base layer; a circuit layer on the base layer; and a display element layer on the circuit layer, the display element layer including: a first electrode; a second electrode; and a light emitting layer between the first electrode and the second electrode and including the quantum dot.

公开(公告)号：US20250101297A1

公开(公告)日：2025-03-27

申请号：US18883409

申请日：2024-09-12

Applicant: Samsung Display Co., Ltd.

Inventor： SUNGJAE KIM ,  Youngsik KIM ,  Bitna YOON ,  DONGHEE LEE ,  TAEKJOON LEE ,  JUNEHYUK JUNG

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

Abstract: A quantum dot includes a core containing a first semiconductor nanocrystal, a first shell around (e.g., surrounding) the core and containing a second semiconductor nanocrystal different from the first semiconductor nanocrystal, and a second shell around (e.g., surrounding) the first shell and containing a third semiconductor nanocrystal different from the first semiconductor nanocrystal and the second semiconductor nanocrystal, wherein the core has a band gap of about 1.5 eV to about 3.3 eV, a band gap of the second shell is greater than a band gap of the core and is about 3.54 eV or less, and a band gap of the first shell is greater than a band gap of the core and smaller than a band gap of the second shell.

公开(公告)号：US20250101299A1

公开(公告)日：2025-03-27

申请号：US18889807

申请日：2024-09-19

Applicant: Samsung Display Co., Ltd.

Inventor： Youngsik KIM ,  Sungjae KIM ,  Hongrae KIM ,  Bitna YOON ,  Donghee LEE ,  Taekjoon LEE ,  Junehyuk JUNG

IPC: C09K11/62 ,  B82Y20/00 ,  B82Y40/00 ,  C01G15/00 ,  G02F1/13357

Abstract: A quantum dot includes copper (Cu), a Group III element, and a Group VI element, wherein the quantum dot further includes a halogen component that is an iodide ion, a bromide ion, a chloride ion, a fluoride ion, or a combination thereof. A molar ratio of the halogen component to the copper (Cu) and a molar ratio of the halogen component to the Group III element is each independently in a range of about 0.01 to about 0.5, and a full width at half maximum (FWHM) of a photoluminescence spectrum of the quantum dot is equal to or less than about 80 nm.

公开(公告)号：US20240166944A1

公开(公告)日：2024-05-23

申请号：US18446629

申请日：2023-08-09

Applicant: Samsung Display Co., Ltd.

Inventor： SUNGJAE KIM ,  Youngsik KIM ,  SEUNG-WON PARK ,  Bitna YOON ,  DONGHEE LEE ,  JUNEHYUK JUNG

IPC: C09K11/62 ,  C09K11/64 ,  G02F1/01

CPC classification number: C09K11/621 ,  C09K11/64 ,  G02F1/01 ,  H10K50/115

Abstract: Embodiments provide a quantum dot, a method of preparing the quantum dot, and a display device including the quantum dot. The quantum dot includes a core including zinc (Zn), tin (Sn), and phosphorous (P), and a shell surrounding the core, wherein a molar ratio of the number of moles of zinc to a number of moles of tin is in a range of about 0.1 to about 0.2.

公开(公告)号：US20250101298A1

公开(公告)日：2025-03-27

申请号：US18758011

申请日：2024-06-28

Applicant: Samsung Display Co., Ltd.

Inventor： SUNGJAE KIM ,  Youngsik KIM ,  Hongrae KIM ,  Bitna YOON ,  DONGHEE LEE ,  TAEKJOON LEE ,  JUNEHYUK JUNG

IPC: C09K11/62 ,  C09K11/58 ,  H01L33/50 ,  H10K50/115 ,  H10K50/155

Abstract: Embodiments provide a quantum dot, a method for preparing a quantum dot, and a light emitting element including the quantum dot. The method for preparing a quantum dot includes forming a core including a copper atom, an indium atom, a gallium atom, and a sulfur atom, and forming a shell surrounding the core by reacting the surface of the core with hydrofluoric acid, a Group II element precursor, and a Group VI element precursor.

公开(公告)号：US20250084306A1

公开(公告)日：2025-03-13

申请号：US18774800

申请日：2024-07-16

Applicant: Samsung Display Co., Ltd.

Inventor： JUNEHYUK JUNG ,  SUNGJAE KIM ,  Youngsik KIM ,  Bitna YOON ,  DONGHEE LEE ,  TAEKJOON LEE

IPC: C09K11/62 ,  C09K11/02 ,  C09K11/56

Abstract: A method for preparing a quantum dot and a quantum dot are provided. The method for preparing a quantum dot includes supplying a first mixture including a first precursor containing gallium oleate, a second precursor containing indium oleate, and a third precursor containing a sulfur atom, forming a second mixture by adding a first solvent to the first mixture, and forming a fourth mixture including a core containing a copper atom, an indium atom, a gallium atom, and a sulfur atom by adding a third mixture containing copper to the second mixture.

公开(公告)号：US20240218249A1

公开(公告)日：2024-07-04

申请号：US18536646

申请日：2023-12-12

Applicant: Samsung Display Co., LTD.

Inventor： Seungwon PARK ,  Sungjae KIM ,  Youngsik KIM ,  Bitna YOON ,  Donghee LEE ,  Junehyuk JUNG

IPC: C09K11/88 ,  C09K11/02 ,  C09K11/56 ,  C09K11/62 ,  C09K11/70 ,  H10K50/115

CPC classification number: C09K11/883 ,  C09K11/025 ,  C09K11/565 ,  C09K11/623 ,  C09K11/70 ,  H10K50/115 ,  B82Y20/00

Abstract: A quantum dot includes a core and a first shell covering at least a portion of the core. The core includes indium (In), a first element, and phosphorus (P). The first shell includes a second element and a third element, the first element and the second element are each independently a Group III element, the third element is a Group VI element. The quantum dot satisfies Inequality 1 below:










(


M
1

+

M
2

+

M
3


)

/

M
In


>
7

,










wherein Inequality 1, MIn denotes the number of moles of In in the core and the first shell, M1 denotes the number of moles of the first element in the core and the first shell, M2 denotes the number of moles of the second element in the core and the first shell, and M3 denotes the number of moles of the third element in the core and the first shell.

公开(公告)号：US20240174920A1

公开(公告)日：2024-05-30

申请号：US18452406

申请日：2023-08-18

Applicant: Samsung Display Co., Ltd.

Inventor： JUNEHYUK JUNG ,  SUNGJAE KIM ,  Youngsik KIM ,  SEUNG-WON PARK ,  Bitna YOON ,  DONGHEE LEE

IPC: C09K11/62 ,  C09K11/58 ,  H10K50/15

CPC classification number: C09K11/623 ,  C09K11/584 ,  H10K50/15

Abstract: A method for preparing a quantum dot includes supplying a first mixture including a first precursor material including a silver precursor, an indium precursor, a first gallium precursor, and a first solvent including oleylamine, trioctylphosphine oxide, and trioctylamine, adding a first sulfur precursor to the first mixture to form cores including silver, indium, gallium, and sulfur, reacting the cores with a second precursor material including a second sulfur precursor and a second gallium precursor to form a first shell around each of the cores, wherein the cores including the first shells comprise first particles, and adding a first element precursor and a second element precursor to a second mixture, the second mixture including the first particles and a second solvent, to form a second shell around each of the first shells.

公开(公告)号：US20240150651A1

公开(公告)日：2024-05-09

申请号：US18365337

申请日：2023-08-04

Applicant: Samsung Display Co., Ltd.

Inventor： SEUNG-WON PARK ,  SUNGJAE KIM ,  Youngsik KIM ,  Bitna YOON ,  DONGHEE LEE ,  JUNEHYUK JUNG

IPC: C09K11/88 ,  C09K11/08 ,  H10K59/35 ,  H10K59/38

CPC classification number: C09K11/883 ,  C09K11/0883 ,  H10K59/352 ,  H10K59/38 ,  B82Y20/00

Abstract: Embodiments provide a quantum dot that includes a core including zinc (Zn), tin (Sn) and phosphorus (P), and a shell surrounding the core, wherein a molar ratio of a number of moles of zinc to a number of moles of tin is in a range of about 0.1 to about 2. The quantum dots have high luminous efficiency and color purity.

公开(公告)号：US20240101896A1

公开(公告)日：2024-03-28

申请号：US18362825

申请日：2023-07-31

Applicant: Samsung Display Co., Ltd.

Inventor： Youngsik KIM ,  Sungjae KIM ,  Seung-Won PARK ,  Bitna YOON ,  Donghee LEE ,  Junehyuk JUNG

IPC: C09K11/70 ,  C09K11/02 ,  C09K11/56 ,  C09K11/88 ,  H10K59/38

CPC classification number: C09K11/70 ,  C09K11/02 ,  C09K11/565 ,  C09K11/883 ,  H10K59/38

Abstract: A quantum dot includes a core including InP, a first shell around (e.g., surrounding) the core and including ZnTeSe, a second shell around (e.g., surrounding) the first shell and including ZnSe, and a third shell around (e.g., surrounding) the second shell and including ZnS, wherein the ratio of the number of moles of the Te in the first shell to the number of moles of the P in the core is about 0.02 to about 0.90.