公开(公告)号：US11355722B2

公开(公告)日：2022-06-07

申请号：US16944257

申请日：2020-07-31

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：US11322689B2

公开(公告)日：2022-05-03

申请号：US16737989

申请日：2020-01-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

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

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 proportion of a delayed fluorescence component in light emitted from the exciplex is higher than or equal to 5%, and the delayed fluorescence component contains a delayed fluorescence component whose fluorescence lifetime is 10 ns or longer and 50 μs or shorter.

公开(公告)号：US11107995B2

公开(公告)日：2021-08-31

申请号：US15629128

申请日：2017-06-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Tomoka Hara ,  Hideko Inoue ,  Tatsuyoshi Takahashi ,  Satoshi Seo

IPC: H01L51/54 ,  H01L51/00 ,  C07D409/10 ,  C09K11/02 ,  H01L27/32 ,  H01L51/50 ,  H01L51/52 ,  H01L51/56

Abstract: A novel organic compound that is effective in improving the element characteristics and reliability is provided. The organic compound, which is represented by General Formula (G1), has a structure in which a dibenzoquinazoline ring is bonded to a skeleton with a hole-transport property via one or more arylene groups. Any one of R1 to R9 in General Formula (G1) is bonded to any one of R10 to R14 in General Formula (G1-1). Note that n is any of 0 to 3; m is 1 or 2; A represents a single bond, or an arylene group; B represents a ring having a dibenzofuran skeleton, dibenzothiophene skeleton, or carbazole skeleton; and each of R1 to R15 independently represents any of hydrogen, an alkyl group, a cycloalkyl group, and an aryl group.

公开(公告)号：US10811611B2

公开(公告)日：2020-10-20

申请号：US15958665

申请日：2018-04-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

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

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 proportion of a delayed fluorescence component in light emitted from the exciplex is higher than or equal to 5%, and the delayed fluorescence component contains a delayed fluorescence component whose fluorescence lifetime is 10 ns or longer and 50 μs or shorter.

公开(公告)号：US10700291B2

公开(公告)日：2020-06-30

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: H01L51/54 ,  C09K11/06 ,  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：US10586931B2

公开(公告)日：2020-03-10

申请号：US15385064

申请日：2016-12-20

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Miki Kanamoto ,  Hideko Inoue ,  Tatsuyoshi Takahashi ,  Hiromitsu Kido ,  Satoshi Seo

IPC: H01L51/00 ,  C07D491/048 ,  C09K11/06 ,  H01L27/32 ,  H01L51/50 ,  H01L51/52

Abstract: A compound includes a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton, a first substituent, and a second substituent. Each of the first substituent and the second substituent includes a furan skeleton, a thiophene skeleton, or a pyrrole skeleton. The first substituent is bonded to a pyrimidine ring included in the benzofuropyrimidine skeleton or a pyrimidine ring included in the benzothienopyrimidine skeleton. The second substituent is bonded to a benzene ring included in the benzofuropyrimidine skeleton or a benzene ring included in the benzothienopyrimidine skeleton. The light-emitting element includes the compound.

公开(公告)号：US10388891B2

公开(公告)日：2019-08-20

申请号：US15085390

申请日：2016-03-30

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Tomoya Yamaguchi ,  Hideko Inoue ,  Tatsuyoshi Takahashi

IPC: C07F15/00 ,  C09K11/06 ,  H01L51/00 ,  H05B33/14

Abstract: As a novel substance having a novel skeleton, an organometallic complex with high emission efficiency is provided. The organometallic complex includes a metal and a ligand. The metal is iridium or platinum. The ligand includes a 5H-pyrimido[5,4-b]indole skeleton and an aryl group bonded to the 4-position of the 5H-pyrimido[5,4-b]indole skeleton. The 3-position of the 5H-pyrimido[5,4-b]indole skeleton and the aryl group are bonded to the metal. In the formula, M represents iridium or platinum. In addition, Ar represents a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and each of R1 to R6 independently represents hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms.

公开(公告)号：US10361389B2

公开(公告)日：2019-07-23

申请号：US15592485

申请日：2017-05-11

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：US10347847B2

公开(公告)日：2019-07-09

申请号：US15494988

申请日：2017-04-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kaori Ogita ,  Satoshi Seo ,  Hiromi Seo ,  Tatsuyoshi Takahashi

IPC: H01L51/50 ,  H01L51/00

Abstract: A novel organic compound that forms an exciplex emitting light with high efficiency is provided. An organic compound with a triarylamine skeleton in which the three aryl groups of the triarylamine skeleton are a p-biphenyl group, a fluoren-2-yl group, and a phenyl group to which a dibenzofuranyl group or a dibenzothiophenyl group is bonded. By the use of the organic compound and an organic compound with an electron-transport property, an exciplex that emits light with extremely high efficiency can be formed.

公开(公告)号：US10305044B2

公开(公告)日：2019-05-28

申请号：US15097520

申请日：2016-04-13

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Yuko Kubota ,  Tatsuyoshi Takahashi ,  Satomi Mitsumori

IPC: H01L51/00 ,  C07D403/14 ,  C09K11/06 ,  C07D401/14 ,  H01L51/50

Abstract: A novel heterocyclic compound is provided. A highly efficient and reliable light-emitting element is provided. The heterocyclic compound is represented by a general formula (G1). In the general formula (G1), any one, two, or three of Y1 to Y4 in a ring A represent N atoms, and the rest of Y1 to Y4 represents CH. In the case where any two or three of the Y1 to Y4 are N atoms, the N atoms are not next to each other. Further, Ar1 represents a substituted or unsubstituted biphenyldiyl group, Ar2 represents a substituted or unsubstituted biphenyldiyl group, Cz1 represents a substituted or unsubstituted heterocyclic group including a carbazole skeleton, Cz2 represents a substituted or unsubstituted heterocyclic group including a carbazole skeleton, the carbazole skeleton included in the Cz1 is directly bonded to the Ar1, and the carbazole skeleton included in the Cz2 is directly bonded to the Ar2.