公开(公告)号：US11193061B2

公开(公告)日：2021-12-07

申请号：US16196117

申请日：2018-11-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung Woo Kim ,  Jin A Kim ,  Tae Hyung Kim ,  Jeong Hee Lee ,  Eun Joo Jang

IPC: C09K11/88 ,  C09K11/56 ,  H01L51/50

Abstract: A quantum dot comprising a core comprising a first semiconductor nanocrystal comprising zinc, selenium, and optionally tellurium; and a shell disposed on the core and comprising a second semiconductor nanocrystal having a different composition from the first semiconductor nanocrystal, and comprising zinc and at least one of sulfur and selenium, wherein the shell comprises at least three branches extending from the core, wherein at least one of the branches has a length of greater than or equal to about 2 nm, the quantum dot emits blue light comprising a maximum emission peak at a wavelength of less than or equal to about 470 nm, a full width at half maximum (FWHM) of the maximum emission peak is less than about 35 nm, and the quantum dot does not comprise cadmium.

公开(公告)号：US11139441B2

公开(公告)日：2021-10-05

申请号：US16297923

申请日：2019-03-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jaejun Chang ,  Sang Jin Lee ,  Eun Joo Jang ,  Ha Il Kwon ,  Dae Young Chung

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

Abstract: A quantum dot device including an anode and a cathode facing each other, a quantum dot layer disposed between the anode and the cathode, and an electron transport layer disposed between the cathode and the quantum dot layer, wherein the quantum dot layer includes an emissive quantum dot emitting light in at least one part of a wavelength region in a visible region and a non-emissive quantum dot configured to not emit light in a visible region, and a difference between a lowest unoccupied molecular orbital (LUMO) energy level of the non-emissive quantum dot and a LUMO energy level of the electron transport layer is greater than or equal to about 0.5 electronvolts (eV).

公开(公告)号：US11060019B2

公开(公告)日：2021-07-13

申请号：US16158483

申请日：2018-10-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Yongwook Kim ,  Eun Joo Jang ,  Tae Gon Kim ,  Shang Hyeun Park ,  Hyo Sook Jang ,  Young-soo Jeong

IPC: C09K11/65 ,  C09K11/02 ,  B82Y20/00 ,  B82Y30/00 ,  B82Y40/00 ,  C09K11/88 ,  C09K11/08 ,  G02F1/1335 ,  G02F1/13357 ,  H01L27/32

Abstract: A composition comprising: a plurality of quantum dots; a plurality of luminous carbon nanoparticles; a carboxylic acid group-containing binder; a polymerizable monomer including a carbon-carbon double bond; and an initiator, wherein the plurality of quantum dots comprises a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, or a combination thereof, the plurality of luminous carbon nanoparticles have a size of less than or equal to about 10 nanometers, and exhibit both a D band and a G band in a Raman spectrum thereof, and at least a portion of the plurality of luminous carbon nanoparticles absorb light having a wavelength of greater than or equal to about 400 nanometers and a maximum luminous peak wavelength thereof is greater than or equal to about 480 nanometers.

公开(公告)号：US11038112B2

公开(公告)日：2021-06-15

申请号：US16203988

申请日：2018-11-29

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dae Young Chung ,  Moon Gyu Han ,  Tae Hyung Kim ,  Sang Jin Lee ,  Eun Joo Jang

IPC: H01L51/50 ,  H01L51/00 ,  H01L51/52

Abstract: An electroluminescent device and a display device includes the same are disclosed. The electroluminescent device includes a first electrode; a hole transport layer disposed on the first electrode and including a first organic material having a conjugated structure; an emission layer disposed directly on the hole transport layer and including a plurality of light emitting particles; an electron transport layer disposed on the emission layer; and a second electrode disposed on the electron transport layer, wherein at least one of the light emitting particles includes a core and a hydrophilic ligand attached to a surface of the core, wherein the hole transport layer has a first thickness and a second thickness at any two point locations, and the first thickness and the second thickness satisfy Equation 1.
Equation 1 is described in the detailed description.

公开(公告)号：US10983432B2

公开(公告)日：2021-04-20

申请号：US15241208

申请日：2016-08-19

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Samsung SDI Co., Ltd.

Inventor： Shin Ae Jun ,  Shang Hyeun Park ,  Hojeong Paek ,  Jonggi Kim ,  Hyeyeon Yang ,  Eun Joo Jang ,  Yong Seok Han

IPC: G03F7/00 ,  G03F7/033 ,  G02B5/22 ,  G02B5/20 ,  C09K11/08 ,  C09K11/02 ,  G03F7/004

Abstract: A photosensitive composition including a quantum dot dispersion, a photopolymerizable monomer having a carbon-carbon double bond, and a photoinitiator, wherein the quantum dot dispersion includes an acid group-containing polymer and a plurality of quantum dots dispersed in the acid group-containing polymer, and wherein the acid group-containing polymer includes a copolymer of a monomer combination including a first monomer having a carboxylic acid group or a phosphonic acid group and a carbon-carbon double bond and a second monomer having a carbon-carbon double bond and a hydrophobic group and not having a carboxylic acid group and a phosphonic acid group.

公开(公告)号：US10978658B2

公开(公告)日：2021-04-13

申请号：US16549472

申请日：2019-08-23

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：US10978657B2

公开(公告)日：2021-04-13

申请号：US16549430

申请日：2019-08-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jin A Kim ,  Yuho Won ,  Sung Woo Kim ,  Tae Hyung Kim ,  Jeong Hee Lee ,  Eun Joo Jang

IPC: H01L51/50

Abstract: Quantum dots and electroluminescent devices including the same, wherein the quantum dots include a core including a first semiconductor nanocrystal including a zinc chalcogenide; and a shell disposed on the core, the shell including zinc, sulfur, and selenium, wherein the quantum dots have an average particle size of greater than 10 nm, wherein the quantum dots do not include cadmium, and wherein a photoluminescent peak of the quantum dots is present in a wavelength range of greater than or equal to about 430 nm and less than or equal to about 470 nm.

公开(公告)号：US10975298B2

公开(公告)日：2021-04-13

申请号：US16817902

申请日：2020-03-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Hyo Sook Jang ,  Yuho Won ,  Sungwoo Hwang ,  Ji Yeong Kim ,  Eun Joo Jang

IPC: C09K11/08 ,  C08L57/10 ,  G02F1/1335 ,  H01L51/50 ,  H01L27/32 ,  C09D133/00 ,  C08F220/06 ,  C09D133/02 ,  B82Y20/00 ,  B82Y40/00 ,  G02F1/13357

Abstract: A cadmium free quantum dot including a semiconductor nanocrystal core and a semiconductor nanocrystal shell disposed on the core, wherein the quantum dot does not include cadmium and includes indium and zinc, the quantum dot has a maximum photoluminescence peak in a red light wavelength region, a full width at half maximum (FWHM) of the maximum photoluminescence peak is less than or equal to about 40 nanometers (nm), an ultraviolet-visible (UV-Vis) absorption spectrum of the quantum dot includes a valley between about 450 nm to a center wavelength of a first absorption peak, and a valley depth (VD) defined by the following equation is greater than or equal to about 0.2, a quantum dot polymer composite including the same, and a display device including the quantum dot-polymer composite: (Absfirst−Absvalley)/Absfirst=VD.

公开(公告)号：US10961446B2

公开(公告)日：2021-03-30

申请号：US16297965

申请日：2019-03-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kwanghee Kim ,  Jaejun Chang ,  Oul Cho ,  Tae Hyung Kim ,  Sang Jin Lee ,  Eun Joo Jang ,  Young-soo Jeong ,  Moon Gyu Han

IPC: H01L51/50 ,  C09K11/02 ,  C09K11/88 ,  H01L27/32 ,  B82Y40/00 ,  B82Y20/00

Abstract: A quantum dot, and a light emitting device including the same is provided. The quantum dot includes a semiconductor nanocrystal and an organic ligand bound to the surface of the semiconductor nanocrystal, wherein the organic ligand includes a first ligand derived from a first thiol compound including a C12 or more aliphatic hydrocarbon group, and a second ligand derived from a second thiol compound including a C8 or less aliphatic hydrocarbon group.

公开(公告)号：US10950741B2

公开(公告)日：2021-03-16

申请号：US16234694

申请日：2018-12-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Shin Ae Jun ,  Eun Joo Jang ,  Soo Kyung Kwon ,  Taek Hoon Kim ,  Won Joo Lee

IPC: H01L31/0296 ,  H01L31/0304 ,  H01L31/0352 ,  B82Y40/00 ,  B82Y30/00

Abstract: A nanocrystal including a core including a Group III element and a Group V element, and a monolayer shell on the surface of the core, the shell including a compound of the formula ZnSexS(1-x), wherein 0≤x≤1, and wherein an average mole ratio of Se:S in the monolayer shell ranges from about 2:1 to about 20:1.