公开(公告)号：US11581504B2

公开(公告)日：2023-02-14

申请号：US17132971

申请日：2020-12-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Tae Ho Kim ,  Sung Woo Kim ,  Eun Joo Jang ,  Dae Young Chung

IPC: H01L51/50 ,  H01L51/00 ,  H01L27/32

Abstract: An electroluminescent device comprising a first electrode and a second electrode facing each other, an emission layer disposed between the first electrode and the second electrode and including at least two light emitting particles, a hole transport layer disposed between the first electrode and the emission layer, and an electron transport layer disposed between the emission layer and the second electrode, wherein the electron transport layer comprises an inorganic layer disposed on the emission layer, the inorganic layer comprising a plurality of inorganic nanoparticles; and an organic layer directly disposed on at least a portion of the inorganic layer on a side opposite the emission layer, wherein a work function of the organic layer is greater than a work function of the inorganic layer.

公开(公告)号：US11569469B2

公开(公告)日：2023-01-31

申请号：US17205015

申请日：2021-03-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dae Young Chung ,  Kwanghee Kim ,  Hongkyu Seo ,  Eun Joo Jang ,  Oul Cho ,  Tae Hyung Kim ,  Yuho Won ,  Hee Jae Lee

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

Abstract: A light emitting device, a method of manufacturing the same, and a display device including the same are disclosed. The light emitting device including a first electrode and a second electrode facing each other, an emission layer disposed between the first electrode and the second electrode, the emission layer including quantum dots, and a charge auxiliary layer disposed between the emission layer and the second electrode, wherein the emission layer includes a first surface facing the charge auxiliary layer and an opposite second surface, the quantum dots include a first organic ligand on a surface of the quantum dots, in the emission layer, an amount of the first organic ligand in a portion adjacent to the first surface is larger than an amount of the first organic ligand in a portion adjacent to the second surface.

公开(公告)号：US11567360B2

公开(公告)日：2023-01-31

申请号：US16989794

申请日：2020-08-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Hyun A Kang ,  Eun Joo Jang ,  Hyo Sook Jang ,  Shin Ae Jun

IPC: G02F1/1335 ,  C09D123/08 ,  C09K11/02 ,  G02F1/13357 ,  C09K11/56 ,  C09K11/70 ,  C09K11/88 ,  C08K9/08

Abstract: A backlight unit for a liquid crystal display device, the backlight unit including: an light emitting diode (“LED”) light source; a light conversion layer disposed separate from the LED light source to convert light emitted from the LED light source to white light and to provide the white light to the liquid crystal panel; and a light guide panel disposed between the LED light source and the light conversion layer, wherein the light conversion layer includes a semiconductor nanocrystal and a polymer matrix, and wherein the polymer matrix includes a first polymerized polymer of a first monomer including at least two thiol (—SH) groups, each located at a terminal end of the first monomer, and a second monomer including at least two unsaturated carbon-carbon bonds, each located at a terminal end of the second monomer.

公开(公告)号：US11539015B2

公开(公告)日：2022-12-27

申请号：US17132971

申请日：2020-12-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Tae Ho Kim ,  Sung Woo Kim ,  Eun Joo Jang ,  Dae Young Chung

IPC: H01L51/50 ,  H01L51/00 ,  H01L27/32

Abstract: An electroluminescent device comprising a first electrode and a second electrode facing each other, an emission layer disposed between the first electrode and the second electrode and including at least two light emitting particles, a hole transport layer disposed between the first electrode and the emission layer, and an electron transport layer disposed between the emission layer and the second electrode, wherein the electron transport layer comprises an inorganic layer disposed on the emission layer, the inorganic layer comprising a plurality of inorganic nanoparticles; and an organic layer directly disposed on at least a portion of the inorganic layer on a side opposite the emission layer, wherein a work function of the organic layer is greater than a work function of the inorganic layer.

公开(公告)号：US11499098B2

公开(公告)日：2022-11-15

申请号：US17007179

申请日：2020-08-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung Woo Kim ,  Jin A Kim ,  Tae Hyung Kim ,  Kun Su Park ,  Yuho Won ,  Jeong Hee Lee ,  Eun Joo Jang ,  Hyo Sook Jang ,  Yong Seok Han ,  Heejae Chung

IPC: C09K11/88 ,  H01L51/50 ,  B82Y20/00 ,  B82Y30/00 ,  B82Y40/00

Abstract: A quantum dot including a core comprising a first semiconductor nanocrystal including a zinc chalcogenide and a semiconductor nanocrystal shell disposed on the surface of the core and comprising zinc, selenium, and sulfur. The quantum dot does not comprise cadmium, emits blue light, and may exhibit a digital diffraction pattern obtained by a Fast Fourier Transform of a transmission electron microscopic image including a (100) facet of a zinc blende structure. In an X-ray diffraction spectrum of the quantum dot, a ratio of a defect peak area with respect to a peak area of a zinc blende crystal structure is less than about 0.8:1. A method of producing the quantum dot, and an electroluminescent device including the quantum dot are also disclosed.

公开(公告)号：US11254863B2

公开(公告)日：2022-02-22

申请号：US16791327

申请日：2020-02-14

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 ,  H01L51/50 ,  B82Y40/00 ,  B82Y20/00

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：US11233211B2

公开(公告)日：2022-01-25

申请号：US16351654

申请日：2019-03-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung Woo Kim ,  Chan Su Kim ,  Tae Ho Kim ,  Kun Su Park ,  Eun Joo Jang ,  Jin A Kim ,  Tae Hyung Kim ,  Jeong Hee Lee

IPC: H01L51/50 ,  H01L51/00 ,  H01L51/42

Abstract: An electroluminescent device, a method of manufacturing the same, and a display device including the same. The electroluminescent device includes a first electrode and a second electrode facing each other; an emission layer disposed between the first electrode and the second electrode, the emission layer including light emitting particles; an electron transport layer disposed between the first electrode and the emission layer; and a hole transport layer disposed between the second electrode and the emission layer, wherein the electron transport layer includes inorganic oxide particles and a metal-organic compound, the metal-organic compound or a thermal decomposition product of the metal-organic compound being soluble a non-polar solvent.

公开(公告)号：US11226447B2

公开(公告)日：2022-01-18

申请号：US16297051

申请日：2019-03-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Tae Hyung Kim ,  Eun Joo Jang ,  Shin Ae Jun ,  Hyun A Kang ,  Yongwook Kim ,  Na Youn Won ,  Hyo Sook Jang

IPC: G02F1/13357 ,  G02F1/1335 ,  F21V8/00

Abstract: A light source includes a light emitting element which emits light, and a light conversion layer which converts the light emitted from the light emitting element into white light and emits the white light, where the light conversion layer includes a resin and a quantum dot material mixed with the resin, and a red apex of a color region of the white light is positioned in a region of 0.65

公开(公告)号：US11142693B2

公开(公告)日：2021-10-12

申请号：US16850119

申请日：2020-04-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jihyun Min ,  Eun Joo Jang ,  Yong Wook Kim

IPC: C09K11/00 ,  H01B1/00 ,  H01L27/00 ,  C09K11/88 ,  C09K11/02 ,  C09K11/08 ,  H01L27/32 ,  H01B1/06 ,  B82Y20/00 ,  B82Y40/00 ,  G02F1/1335 ,  G02F1/13357

Abstract: A nanoplatelet including a two-dimensional template including a first semiconductor nanocrystal; and a first shell including a second semiconductor nanocrystal disposed on a surface of the two-dimensional template, the second semiconductor nanocrystal having a composition different from the first semiconductor nanocrystal, wherein the second semiconductor nanocrystal includes a Group III-V compound, and wherein the nanoplatelet does not include cadmium.

公开(公告)号：US11142685B2

公开(公告)日：2021-10-12

申请号：US16245544

申请日：2019-01-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yuho Won ,  Nayoun Won ,  Sungwoo Hwang ,  Eun Joo Jang ,  Soo Kyung Kwon ,  Yong Wook Kim ,  Jihyun Min ,  Garam Park ,  Shang Hyeun Park ,  Hyo Sook Jang ,  Shin Ae Jun ,  Yong Seok Han

IPC: H01L51/50 ,  C09K11/08 ,  C08L57/10 ,  G02F1/13357 ,  H01L27/32 ,  C09K11/02 ,  C09K11/56 ,  C09K11/70 ,  C09K11/88 ,  H05B33/14 ,  B82Y40/00 ,  B82Y20/00 ,  G02F1/1335

Abstract: A cadmium free quantum dot not including cadmium and including: a semiconductor nanocrystal core comprising indium and phosphorous, a first semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core and comprising zinc and selenium, and a second semiconductor nanocrystal shell disposed on the first semiconductor nanocrystal shell and comprising zinc and sulfur, a composition and composite including the same, and an electronic device.