公开(公告)号：US12063856B2

公开(公告)日：2024-08-13

申请号：US17703524

申请日：2022-03-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yui Yoshiyasu ,  Naoaki Hashimoto ,  Tatsuyoshi Takahashi ,  Sachiko Kawakami ,  Satoshi Seo

IPC: H10K85/60 ,  H10K50/16

CPC classification number: H10K85/6572 ,  H10K85/615 ,  H10K85/626 ,  H10K85/654 ,  H10K50/16

Abstract: A novel mixed material for a light-emitting device with improved heat resistance is provided. The mixed material for a light-emitting device includes a first heteroaromatic compound and a second heteroaromatic compound. The first heteroaromatic compound includes a first heteroaromatic ring. The first heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. The second heteroaromatic compound includes a second heteroaromatic ring. The second heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. A structure of the first heteroaromatic ring is different from a structure of the second heteroaromatic ring.

公开(公告)号：US20220336755A1

公开(公告)日：2022-10-20

申请号：US17703524

申请日：2022-03-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yui Yoshiyasu ,  Naoaki Hashimoto ,  Tatsuyoshi Takahashi ,  Sachiko Kawakami ,  Satoshi Seo

IPC: H01L51/00

Abstract: A novel mixed material for a light-emitting device with improved heat resistance is provided. The mixed material for a light-emitting device includes a first heteroaromatic compound and a second heteroaromatic compound. The first heteroaromatic compound includes a first heteroaromatic ring. The first heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. The second heteroaromatic compound includes a second heteroaromatic ring. The second heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. A structure of the first heteroaromatic ring is different from a structure of the second heteroaromatic ring.

公开(公告)号：US20220271248A1

公开(公告)日：2022-08-25

申请号：US17733025

申请日：2022-04-29

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：US11322709B2

公开(公告)日：2022-05-03

申请号：US17113238

申请日：2020-12-07

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：US11276824B2

公开(公告)日：2022-03-15

申请号：US16291710

申请日：2019-03-04

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：US11088333B2

公开(公告)日：2021-08-10

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：US10749112B2

公开(公告)日：2020-08-18

申请号：US16385472

申请日：2019-04-16

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Tatsuyoshi Takahashi ,  Kyoko Takeda ,  Kanta Abe ,  Hiroki Suzuki

IPC: H01L51/00 ,  H01L27/32 ,  C07F15/00 ,  C09K11/06 ,  G06F3/041 ,  G06F3/045 ,  H01L51/50 ,  H05B33/14 ,  H05B33/20

Abstract: A light-emitting element with a lower voltage and higher emission efficiency is provided. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound, and a difference between them is larger than 0 eV and smaller than or equal to 0.5 eV. Furthermore, the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.

公开(公告)号：US20200020870A1

公开(公告)日：2020-01-16

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：US10454052B2

公开(公告)日：2019-10-22

申请号：US15944013

申请日：2018-04-03

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.

公开(公告)号：US10431752B2

公开(公告)日：2019-10-01

申请号：US15981060

申请日：2018-05-16

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Tomoya Yamaguchi ,  Hiromi Seo ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H01L51/00 ,  C07F15/00

Abstract: An organometallic iridium complex that has high emission efficiency and a long lifetime and emits deep red light (emission wavelength: around 700 nm) is provided. The organometallic iridium complex has a ligand that is represented by General Formula (G0) and has at least a dimethyl phenyl group and a quinoxaline skeleton. In the formula, R1 to R3 separately represent an alkyl group having 1 to 6 carbon atoms, a phenyl group, or a phenyl group having an alkyl group having 1 to 6 carbon atoms as a substituent.