公开(公告)号：US20250048926A1

公开(公告)日：2025-02-06

申请号：US18805886

申请日：2024-08-15

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko INOUE ,  Miki Kanamoto ,  Hiromi Seo ,  Satoshi Seo ,  Tatsuyoshi Takahashi ,  Tomoka Nakagawa

IPC: H10K85/60 ,  C07D491/048 ,  H10K50/11 ,  H10K85/30 ,  H10K101/00 ,  H10K101/10

Abstract: Alight-emitting element having high emission efficiency is provided. A light-emitting element having a low driving voltage is provided. A novel compound which can be used for a transport layer or as a host material or a light-emitting material of a light-emitting element is provided. A novel compound with a benzofuropyrimidine skeleton is provided. Also provided is a light-emitting element which includes the compound with the benzofuropyrimidine skeleton between a pair of electrodes.

公开(公告)号：US12102000B2

公开(公告)日：2024-09-24

申请号：US16473372

申请日：2017-12-15

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Tomoya Yamaguchi ,  Hideko Yoshizumi ,  Hiromitsu Kido ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H10K85/60 ,  C07D491/048 ,  H10K50/11 ,  H10K101/00 ,  H10K101/10 ,  H10K101/30

CPC classification number: H10K85/657 ,  C07D491/048 ,  H10K85/6576 ,  H10K50/11 ,  H10K2101/10 ,  H10K2101/30 ,  H10K2101/90

Abstract: A novel compound and a light-emitting element with high emission efficiency and a long lifetime are provided. The novel compound includes a benzofuropyrazine skeleton or a benzothienopyrazine skeleton, and each of a benzene ring and a pyrazine ring in the benzofuropyrazine skeleton or the benzothienopyrazine skeleton independently includes a substituent with a total number of carbon atoms of 6 to 100 inclusive. The light-emitting element includes the compound.

公开(公告)号：US20240276753A1

公开(公告)日：2024-08-15

申请号：US18606779

申请日：2024-03-15

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Hiromi Seo ,  Tatsuyoshi Takahashi ,  Takahiro Ishisone

IPC: H10K50/13 ,  H10K50/11 ,  H10K50/81 ,  H10K50/82 ,  H10K85/30 ,  H10K85/60 ,  H10K101/00 ,  H10K101/10

CPC classification number: H10K50/13 ,  H10K50/11 ,  H10K50/81 ,  H10K50/82 ,  H10K85/342 ,  H10K85/633 ,  H10K85/636 ,  H10K85/6572 ,  H10K85/6576 ,  H10K85/341 ,  H10K85/346 ,  H10K85/615 ,  H10K85/624 ,  H10K85/626 ,  H10K2101/10 ,  H10K2101/27 ,  H10K2101/90

Abstract: A multicolor light-emitting element using fluorescence and phosphorescence, which has a small number of manufacturing steps owing to a relatively small number of layers to be formed and is advantageous for practical application can be provided. In addition, a multicolor light-emitting element using fluorescence and phosphorescence, which has favorable emission efficiency is provided. A light-emitting element which includes a light-emitting layer having a stacked-layer structure of a first light-emitting layer exhibiting light emission from a first exciplex and a second light-emitting layer exhibiting phosphorescence is provided.

公开(公告)号：US20240147852A1

公开(公告)日：2024-05-02

申请号：US18381846

申请日：2023-10-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Takao Hamada ,  Tatsuyoshi Takahashi ,  Yasushi Kitano ,  Hiroki Suzuki ,  Hideko Inoue

IPC: H10K85/60 ,  C07D403/14

CPC classification number: H10K85/6572 ,  C07D403/14 ,  H10K85/342 ,  Y02P20/582

Abstract: To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.

公开(公告)号：US11800799B2

公开(公告)日：2023-10-24

申请号：US18094154

申请日：2023-01-06

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Takao Hamada ,  Tatsuyoshi Takahashi ,  Yasushi Kitano ,  Hiroki Suzuki ,  Hideko Inoue

IPC: H10K85/60 ,  C07D403/14 ,  H10K85/30

CPC classification number: H10K85/6572 ,  C07D403/14 ,  H10K85/342 ,  H10K85/633 ,  H10K85/636 ,  Y02P20/582

Abstract: To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.

公开(公告)号：US11600789B2

公开(公告)日：2023-03-07

申请号：US16911892

申请日：2020-06-25

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Miki Kanamoto ,  Hiromi Seo ,  Satoshi Seo ,  Tatsuyoshi Takahashi ,  Tomoka Nakagawa

IPC: H01L51/54 ,  H01L51/00 ,  C07D491/048 ,  H01L51/50

Abstract: A light-emitting element having high emission efficiency is provided. A light-emitting element having a low driving voltage is provided. A novel compound which can be used for a transport layer or as a host material or a light-emitting material of a light-emitting element is provided. A novel compound with a benzofuropyrimidine skeleton is provided. Also provided is a light-emitting element which includes the compound with the benzofuropyrimidine skeleton between a pair of electrodes.

公开(公告)号：US11552256B2

公开(公告)日：2023-01-10

申请号：US16570062

申请日：2019-09-13

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Takao Hamada ,  Tatsuyoshi Takahashi ,  Yasushi Kitano ,  Hiroki Suzuki ,  Hideko Inoue

IPC: H01L51/50 ,  H01L51/00 ,  C07D403/14

Abstract: To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.

公开(公告)号：US11522138B2

公开(公告)日：2022-12-06

申请号：US15297639

申请日：2016-10-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Sachiko Kawakami ,  Yoshimi Ishiguro ,  Tatsuyoshi Takahashi ,  Takao Hamada

IPC: H01L51/00 ,  C07D409/10 ,  H01L51/50 ,  H01L27/32 ,  C07D403/10 ,  C09K11/02

Abstract: A novel heterocyclic compound is provided. In particular, a novel heterocyclic compound which can improve the element characteristics of a light-emitting element is provided. A novel light-emitting element with high emission efficiency and high heat resistance is provided. A heterocyclic compound represented by General Formula (G1). A represents any of a dibenzothiophenyl group, a dibenzofuranyl group, and a carbazolyl group. DBq represents a dibenzo[f,h]quinoxalinyl group. In addition, n is 0 or 1. Each of Ar1 to Ar4 independently represents a substituted or unsubstituted arylene group having 6 to 10 carbon atoms. In Ar1 to Ar4, the adjacent arylene groups may be bonded to each other to form a ring. When the adjacent arylene groups in Ar1 to Ar4 form a fluorene skeleton, the fluorene skeleton may have a substituent.

公开(公告)号：US11121326B2

公开(公告)日：2021-09-14

申请号：US16940724

申请日：2020-07-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroki Suzuki ,  Tomoya Yamaguchi ,  Hideko Yoshizumi ,  Satoshi Seo ,  Tatsuyoshi Takahashi ,  Hiromitsu Kido ,  Satomi Watabe

IPC: H01L51/00 ,  C07D491/048 ,  H05B33/20 ,  H01L51/50 ,  C09K11/06

Abstract: A novel organic compound is provided. That is, a novel organic compound that is effective in improving the element characteristics and reliability is provided. The organic compound has a benzofuroquinoxaline skeleton or a benzothienoquinoxaline skeleton. The organic compound is represented by General Formula (G1). In the formula, Q represents O or S, and each of R1 to R8 independently represents any of hydrogen, a halogeno group, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 carbon atoms, and a substituted or unsubstituted heteroaryl group having 3 to 12 carbon atoms. At least one of R1 to R8 includes a substituted or unsubstituted condensed aromatic or heteroaromatic ring having 3 to 24 carbon atoms.

公开(公告)号：US11038134B2

公开(公告)日：2021-06-15

申请号：US16595639

申请日：2019-10-08

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunsuke Hosoumi ,  Takahiro Ishisone ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H01L51/50 ,  H01L51/00

Abstract: A light-emitting element containing a fluorescent material and having high emission efficiency is provided. The light-emitting element contains the fluorescent material and a host material. The host material contains a first organic compound and a second organic compound. The first organic compound and the second organic compound can form an exciplex. The minimum value of a distance between centroids of the fluorescent material and at least one of the first organic compound and the second organic compound is 0.7 nm or more and 5 nm or less.