公开(公告)号：US10862059B2

公开(公告)日：2020-12-08

申请号：US16516987

申请日：2019-07-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

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

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：US10833279B2

公开(公告)日：2020-11-10

申请号：US16047475

申请日：2018-07-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiromi Seo ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H01L51/00 ,  H01L51/50

Abstract: Provided is a light-emitting element with high emission efficiency. The light-emitting element including a first electrode, a second electrode, and a layer containing an organic compound between the first electrode and the second electrode. The layer containing the organic compound includes a light-emitting layer at least containing a first organic compound, a second organic compound, and a fluorescent substance. The first organic compound has an electron-transport property. The second organic compound has a hole-transport property. The second organic compound has a triarylamine skeleton. At least one of three aryl groups in the triarylamine skeleton is a group including a p-biphenyl skeleton.

公开(公告)号：US10770660B2

公开(公告)日：2020-09-08

申请号：US15914346

申请日：2018-03-07

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Tomoka Hara ,  Yasushi Kitano ,  Hiromi Seo ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: C07D239/26 ,  C07D251/24 ,  H01L51/00 ,  C09K11/06 ,  H01L27/32 ,  H01L51/50

Abstract: Provided is a novel heterocyclic compound, a novel heterocyclic compound that can be used in a light-emitting element, or a highly reliable light-emitting device, electronic device, and lighting device in each of which the light-emitting element using the novel heterocyclic compound is used. One embodiment of the present invention is a heterocyclic compound represented by General Formula (G1). In General Formula (G1), each of A1 and A2 independently represents nitrogen or carbon bonded to hydrogen, and at least one of A1 and A2 represents nitrogen; Ar represents a substituted or unsubstituted arylene group having 6 to 18 carbon atoms; B represents a substituted or unsubstituted fluorenyl group; and R1 represents hydrogen, an alkyl group having 1 to 6 carbon atoms, or an aryl group having 6 to 13 carbon atoms.

公开(公告)号：US10734594B2

公开(公告)日：2020-08-04

申请号：US16412529

申请日：2019-05-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi Seo ,  Hiromi Seo ,  Tatsuyoshi Takahashi

IPC: H01L51/50 ,  H01L51/00 ,  C09K11/02 ,  C09K11/06

Abstract: To provide a light-emitting element which uses a fluorescent material as a light-emitting substance and has higher luminous efficiency. To provide a light-emitting element which includes a mixture of a thermally activated delayed fluorescent substance and a fluorescent material. By making the emission spectrum of the thermally activated delayed fluorescent substance overlap with an absorption band on the longest wavelength side in absorption by the fluorescent material in an S1 level of the fluorescent material, energy at an S1 level of the thermally activated delayed fluorescent substance can be transferred to the S1 of the fluorescent material. Alternatively, it is also possible that the S1 of the thermally activated delayed fluorescent substance is generated from part of the energy of a T1 level of the thermally activated delayed fluorescent substance, and is transferred to the S1 of the fluorescent material.

公开(公告)号：US10665791B2

公开(公告)日：2020-05-26

申请号：US15810725

申请日：2017-11-13

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Sachiko Kawakami ,  Hiromi Seo ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H01L51/00 ,  C07D405/10 ,  C09K11/06 ,  H01L51/50

Abstract: A novel heterocyclic compound that can be used as a host material in which a light-emitting substance is dispersed. A light-emitting element having a long lifetime. A heterocyclic compound in which a substituted or unsubstituted dibenzo[f,h]quinoxalinyl group is bonded to a substituted or unsubstituted arylene group having 6 to 25 carbon atoms which is bonded to any one of the 8-11 positions of a substituted or unsubstituted benzo[b]naphtho[1,2-d]furan skeleton.

公开(公告)号：US10418565B2

公开(公告)日：2019-09-17

申请号：US15988152

申请日：2018-05-24

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：US20190173024A1

公开(公告)日：2019-06-06

申请号：US16255312

申请日：2019-01-23

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: H01L51/00 ,  C07D491/048

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：US10256420B2

公开(公告)日：2019-04-09

申请号：US15248721

申请日：2016-08-26

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Tomoya Yamaguchi ,  Hideko Inoue ,  Tatsuyoshi Takahashi

IPC: H01L51/50 ,  H01L51/00 ,  C07F15/00 ,  C09K11/06

Abstract: A novel organometallic complex having high reliability is provided. The organometallic complex includes platinum and a ligand coordinated to the platinum. The ligand includes a plurality of pyridoindole skeletons. Each of the pyridoindole skeletons includes nitrogen bonded to the platinum. Each of the pyridoindole skeletons is bonded to an arylene group bonded to the platinum.

公开(公告)号：US10230055B2

公开(公告)日：2019-03-12

申请号：US15256000

申请日：2016-09-02

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Miki Kanamoto ,  Takeyoshi Watabe ,  Hideko Inoue ,  Satoshi Seo ,  Satomi Mitsumori ,  Tatsuyoshi Takahashi

IPC: H01L51/50 ,  H01L51/00 ,  C07D491/048 ,  C07F15/00 ,  C09K11/06 ,  H01L27/32

Abstract: Provided is a novel compound or a light-emitting element with high emission efficiency. The provided novel compound includes a bicarbazole skeleton and a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The provided light-emitting element includes the compound.

公开(公告)号：US20180337346A1

公开(公告)日：2018-11-22

申请号：US15988152

申请日：2018-05-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: H01L51/00 ,  C07D403/14

CPC classification number: H01L51/0072 ,  C07D403/14 ,  H01L51/006 ,  H01L51/0061 ,  H01L51/0085 ,  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.