公开(公告)号：US11476434B2

公开(公告)日：2022-10-18

申请号：US17085923

申请日：2020-10-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Heejae Lee ,  Moon Gyu Han ,  Sung Woo Kim ,  Tae Ho Kim ,  Kun Su Park ,  Eun Joo Jang ,  Dae Young Chung

IPC: H01L51/50 ,  H01L51/00

Abstract: An electroluminescent device includes a first electrode and a second electrode facing each other, and a light emitting layer disposed between the first electrode and the second electrode, where the light emitting layer includes a first light emitting layer including a first quantum dot and a second light emitting layer including a second quantum dot and an n-type metal oxide.

公开(公告)号：US12016241B2

公开(公告)日：2024-06-18

申请号：US17171008

申请日：2021-02-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Won Sik Yoon ,  Moon Gyu Han ,  Kwanghee Kim ,  Heejae Lee ,  Eun Joo Jang ,  Tae Hyung Kim ,  Hyo Sook Jang

IPC: H10K85/00 ,  B82Y20/00 ,  B82Y30/00 ,  B82Y40/00 ,  H10K50/11 ,  H10K50/115 ,  H10K50/16 ,  H10K50/17 ,  H10K71/00 ,  H10K101/40 ,  H10K102/00

CPC classification number: H10K85/00 ,  B82Y20/00 ,  B82Y30/00 ,  B82Y40/00 ,  H10K50/11 ,  H10K50/115 ,  H10K50/167 ,  H10K50/171 ,  H10K71/00 ,  H10K2101/40 ,  H10K2102/331

Abstract: A quantum dot device including a first electrode and a second electrode each having a surface opposite the other, a quantum dot layer disposed between the first electrode and the second electrode, an electron transport layer disposed between the quantum dot layer and the second electrode and including first inorganic nanoparticles and a first organic material, and an electron injection layer disposed between the electron transport layer and the second electrode and including second inorganic nanoparticles and a second organic material, wherein a ratio by weight of an amount of the second organic material to a total amount of the second inorganic nanoparticles and the second organic material in the electron injection layer is less than a ratio by weight of an amount of the first organic material to a total amount of the first inorganic nanoparticles and the first organic material in the electron transport layer. An electronic device including the quantum dot device.

公开(公告)号：US11659725B2

公开(公告)日：2023-05-23

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

CPC classification number: H01L51/502 ,  H01L51/5056 ,  H01L51/5092

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：US11611054B2

公开(公告)日：2023-03-21

申请号：US17199977

申请日：2021-03-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Heejae Lee ,  Moon Gyu Han ,  Won Sik Yoon ,  Eun Joo Jang ,  Dae Young Chung ,  Tae Hyung Kim ,  Hyo Sook Jang

IPC: H01L51/50

Abstract: A quantum dot device including a first electrode and a second electrode each having a surface opposite the other, a quantum dot layer disposed between the first electrode and the second electrode, and an electron auxiliary layer disposed between the quantum dot layer and the second electrode, wherein the electron auxiliary layer includes inorganic nanoparticles including an alkaline-earth metal, and an alkali metal, an alkali metal compound, or a combination thereof, and an electronic device including the quantum dot device.

公开(公告)号：US11251390B2

公开(公告)日：2022-02-15

申请号：US16851276

申请日：2020-04-17

Applicant: SAMSUNG ELECTRONICS CO., LTD

Inventor： Dae Young Chung ,  Kwanghee Kim ,  Eun Joo Jang ,  Tae Hyung Kim ,  Hongkyu Seo ,  Heejae Lee ,  Jaejun Chang

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

Abstract: A light emitting device including a first electrode and a second electrode, and an emission layer disposed between the first electrode and the second electrode and including quantum dots, a first charge auxiliary layer disposed between the emission layer and the first electrode, and a second charge auxiliary layer disposed between the emission layer and the second electrode, wherein the emission layer comprises a first emission layer contacting the first charge auxiliary layer, a second emission layer disposed on the first emission layer, and a third emission layer disposed on the second emission layer. The hole mobility of the first emission layer decreases sequentially from the first emission layer to the third emission layer.

公开(公告)号：US11690242B2

公开(公告)日：2023-06-27

申请号：US17688201

申请日：2022-03-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Moon Gyu Han ,  Kwanghee Kim ,  Heejae Lee ,  Eun Joo Jang ,  Dae Young Chung

IPC: H01L51/52 ,  C09K11/88 ,  H01L51/00 ,  H01L51/50

CPC classification number: H01L51/5278 ,  C09K11/883 ,  H01L51/0072 ,  H01L51/502

Abstract: Provided are a light emitting device includes a first electrode and a second electrode facing each other; an emissive layer disposed between the first electrode and the second electrode and a display device including the same. The emissive layer comprises: a first emission layer disposed on the first electrode and having a hole transporting property; a second emission layer and a third emission layer disposed on the first emission layer; wherein the second emission layer comprises an organic compound having a bipolar transport property and the third emission layer has a composition different from the first emission layer and the second emission layer; wherein the first emission layer, the second emission layer, and the third emission layer comprises a plurality of quantum dots, and wherein the first emission layer, the second emission layer, and the third emission layer are configured to emit light of a same color.

公开(公告)号：US11444242B2

公开(公告)日：2022-09-13

申请号：US16701293

申请日：2019-12-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kwanghee Kim ,  Heejae Lee ,  Oul Cho ,  Tae Hyung Kim ,  Eun Joo Jang

IPC: H01L45/00 ,  H01L27/24

Abstract: A resistive memory device including a first electrode and a second electrode facing each other and a variable resistance layer disposed between the first electrode and the second electrode, wherein the variable resistance layer includes cadmium-free quantum dots (Cd-free quantum dots) and at least a portion of the Cd-free quantum dots include a Cd-free quantum dot including a halide anion on a surface of the Cd-free quantum dot, a method of manufacturing the same and an electronic device.

公开(公告)号：US11271190B2

公开(公告)日：2022-03-08

申请号：US16857727

申请日：2020-04-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Moon Gyu Han ,  Kwanghee Kim ,  Heejae Lee ,  Eun Joo Jang ,  Dae Young Chung

IPC: H01L51/52 ,  C09K11/88 ,  H01L51/00 ,  H01L51/50

Abstract: Provided are a light emitting device includes a first electrode and a second electrode facing each other; an emissive layer disposed between the first electrode and the second electrode and a display device including the same. The emissive layer comprises: a first emission layer disposed on the first electrode and having a hole transporting property; a second emission layer and a third emission layer disposed on the first emission layer; wherein the second emission layer comprises an organic compound having a bipolar transport property and the third emission layer has a composition different from the first emission layer and the second emission layer; wherein the first emission layer, the second emission layer, and the third emission layer comprises a plurality of quantum dots, and wherein the first emission layer, the second emission layer, and the third emission layer are configured to emit light of a same color.

公开(公告)号：US12193252B2

公开(公告)日：2025-01-07

申请号：US18300665

申请日：2023-04-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Heejae Lee ,  Sung Woo Kim ,  Eun Joo Jang ,  Dae Young Chung ,  Moon Gyu Han

IPC: H10K50/16 ,  H10K50/115 ,  H10K50/15 ,  H10K50/17

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：US11925043B2

公开(公告)日：2024-03-05

申请号：US17072436

申请日：2020-10-16

Applicant: SAMSUNG ELECTRONICS CO., LTD

Inventor： Moon Gyu Han ,  Heejae Lee ,  Eun Joo Jang ,  Tae Ho Kim ,  Kun Su Park ,  Won Sik Yoon ,  Hyo Sook Jang

IPC: H10K50/115 ,  H10K50/11 ,  H10K50/16 ,  H10K71/00 ,  H10K71/12 ,  H10K101/40 ,  H10K101/30

CPC classification number: H10K50/115 ,  H10K50/11 ,  H10K50/166 ,  H10K71/00 ,  H10K71/12 ,  H10K2101/30 ,  H10K2101/40

Abstract: A quantum dot light-emitting device including first electrode and a second electrode, a quantum dot layer between the first electrode and the second electrode, a first electron transport layer and a second electron layer disposed between the quantum dot layer and the second electrode. The second electron transport layer is disposed between the quantum dot layer and the first electron transport layer, wherein each of the first electron transport layer and the second electron transport layer includes an inorganic material. A lowest unoccupied molecular orbital energy level of the second electron transport layer is shallower than a lowest unoccupied molecular orbital energy level of the first electron transport layer, and a lowest unoccupied molecular orbital energy level of the quantum dot layer is shallower than a lowest unoccupied molecular orbital energy level of the second electron transport layer. An electronic device including the quantum dot light-emitting device.