公开(公告)号：US20210359238A1

公开(公告)日：2021-11-18

申请号：US17387281

申请日：2021-07-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung Woo KIM ,  Tae Ho KIM ,  Eun Joo JANG ,  Hongkyu SEO ,  Sang Jin LEE ,  Dae Young CHUNG ,  Oul CHO

IPC: H01L51/50 ,  H01L51/52 ,  H01L51/56

Abstract: A quantum dot device includes: a first electrode and a second electrode facing each other; a quantum dot layer between the first electrode and the second electrode, and an electron auxiliary layer between the quantum dot layer and the second electrode, the electron auxiliary layer including a first nanoparticle and a second nanoparticle which is larger than the first nanoparticle, wherein a work function of the first electrode is greater than a work function of the second electrode, and wherein a difference between a lowest unoccupied molecular orbital energy level of the quantum dot layer and a lowest unoccupied molecular orbital energy level of the electron auxiliary layer is less than about 1.1 electronvolts.

公开(公告)号：US20210226145A1

公开(公告)日：2021-07-22

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：US20210198569A1

公开(公告)日：2021-07-01

申请号：US17203872

申请日：2021-03-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Tae Hyung KIM ,  Hyun A KANG ,  Eun Joo JANG ,  Dae Young CHUNG

IPC: C09K11/70 ,  H01L51/50

Abstract: Disclosed are a semiconductor nanocrystal particle including indium (In), zinc (Zn), and phosphorus (P), wherein a mole ratio of the zinc relative to the indium is greater than or equal to about 25:1, and the semiconductor nanocrystal particle includes a core including a first semiconductor material including indium, zinc, and phosphorus and a shell disposed on the core and including a second semiconductor material including zinc and sulfur, a method of producing the same, and an electronic device including the same. The semiconductor nanocrystal particle emits blue light having a maximum peak emission at a wavelength of less than or equal to about 470 nanometers.

公开(公告)号：US20210005834A1

公开(公告)日：2021-01-07

申请号：US16921188

申请日：2020-07-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Heejae LEE ,  Sung Woo KIM ,  Eun Joo JANG ,  Dae Young CHUNG ,  Moon Gyu HAN

IPC: H01L51/50

Abstract: A light emitting device includes: a first electrode and a second electrode with a surface facing the first electrode; an emission layer disposed between the first electrode and the second electrode and including a quantum dot (e.g., a plurality of quantum dots); and an electron auxiliary layer disposed between the emission layer and the second electrode. The electron auxiliary layer includes a first layer including a first metal oxide, and a second layer disposed on the first layer and including a second metal oxide. A roughness of an interface between the second layer and the second electrode is less than about 10 nm as determined by an electron microscopy analysis. An absolute value of a difference between a conduction band edge energy level of the second layer and a work function of the second electrode may be less than or equal to about 0.5 eV, and a conduction band edge energy level of the first layer may be less than the conduction band edge energy level of the second layer.

公开(公告)号：US20200263083A1

公开(公告)日：2020-08-20

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

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：US20200083470A1

公开(公告)日：2020-03-12

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 ,  H01L51/56 ,  C09K11/06 ,  H01L51/00

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：US20200028105A1

公开(公告)日：2020-01-23

申请号：US16512954

申请日：2019-07-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Hongkyu SEO ,  Moon Gyu HAN ,  Eun Joo JANG ,  Sujin PARK ,  Dae Young CHUNG

IPC: H01L51/50 ,  H01L33/50 ,  H01L51/44

Abstract: A 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 an electron auxiliary layer disposed between the emission layer and the second electrode, the electron auxiliary layer including nanoparticles and a small molecule organic compound and a display device including the same. The nanoparticles include a metal oxide including zinc, and an electron mobility of the small molecule organic compound is less than an electron mobility of the nanoparticles.

公开(公告)号：US20190280232A1

公开(公告)日：2019-09-12

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 ,  H01L51/56 ,  H01L51/00

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：US20190189945A1

公开(公告)日：2019-06-20

申请号：US15970296

申请日：2018-05-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dae Young CHUNG ,  Hyun A KANG ,  Eun Joo JANG ,  Oul CHO

IPC: H01L51/50 ,  H01L33/50 ,  H01L51/52 ,  H01L33/26 ,  H01L33/06

CPC classification number: H01L51/502 ,  H01L33/06 ,  H01L33/26 ,  H01L33/502 ,  H01L51/0037 ,  H01L51/0052 ,  H01L51/0058 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/5076 ,  H01L51/5203

Abstract: An electroluminescent device and a display device including the same are provided. 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 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 and including at least two different organic semiconductor compounds, wherein a first root-mean surface roughness of a surface of the electron transport layer obtained using a laser interferometer is in a range from about 0.5 nanometers to about 3 nanometers.

公开(公告)号：US20190189928A1

公开(公告)日：2019-06-20

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: H01L51/00 ,  H01L51/50 ,  H01L51/52

CPC classification number: H01L51/0067 ,  H01L51/0007 ,  H01L51/0059 ,  H01L51/0072 ,  H01L51/5016 ,  H01L51/502 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/5092 ,  H01L51/5096 ,  H01L51/5206 ,  H01L51/5221 ,  H01L2251/558

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.