公开(公告)号：US20210226146A1

公开(公告)日：2021-07-22

申请号：US17221969

申请日：2021-04-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi Seo ,  Satoko Shitagaki ,  Nobuharu Ohsawa ,  Hideko Inoue ,  Kunihiko Suzuki

IPC: H01L51/50 ,  C09K11/06 ,  H01L51/00 ,  H05B33/14 ,  C07D409/10

Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having low drive voltage is provided. Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound.

公开(公告)号：US10930852B2

公开(公告)日：2021-02-23

申请号：US16704461

申请日：2019-12-05

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei Yamazaki ,  Satoshi Seo ,  Nobuharu Ohsawa ,  Satoko Shitagaki ,  Hideko Inoue ,  Hiroshi Kadoma ,  Harue Osaka ,  Kunihiko Suzuki ,  Yasuhiko Takemura

IPC: H01L51/00

Abstract: A light-emitting element includes a light-emitting layer including a guest, an n-type host and a p-type host between a pair of electrodes, where the difference between the energy difference between a triplet excited state and a ground state of the n-type host (or p-type host) and the energy difference between a triplet excited state and a ground state of the guest is 0.15 eV or more. Alternatively, in such a light-emitting element, the LUMO level of the n-type host is higher than the LUMO level of the guest by 0.1 eV or more, or the HOMO level of the p-type host is lower than the HOMO level of the guest by 0.1 eV or more.

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.

公开(公告)号：US20190173038A1

公开(公告)日：2019-06-06

申请号：US16271945

申请日：2019-02-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi Seo ,  Satoko Shitagaki ,  Nobuharu Ohsawa ,  Hideko Inoue ,  Kunihiko Suzuki

IPC: H01L51/50 ,  C09K11/06 ,  H01L51/00 ,  C07D409/10 ,  H05B33/14

Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having low drive voltage is provided. Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound.

公开(公告)号：US20190036041A1

公开(公告)日：2019-01-31

申请号：US16136590

申请日：2018-09-20

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Tomoya Yamaguchi ,  Satoshi Seo ,  Yui Yamada

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

Abstract: A high-purity organometallic iridium complex is provided. The organometallic iridium complex includes iridium and a plurality of ligands cyclometallated to the iridium. Each of the plurality of ligands includes a heteroaromatic ring having a coordinatable nitrogen atom. In LC analysis of the organometallic iridium complex, an impurity which has a monochlorinated ligand among the plurality of ligands is 0.1% or less by quantitating using peak area count with a PDA detector.

公开(公告)号：US10193086B2

公开(公告)日：2019-01-29

申请号：US15890899

申请日：2018-02-07

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：US10103341B2

公开(公告)日：2018-10-16

申请号：US14678467

申请日：2015-04-03

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Satoshi Seo ,  Nobuharu Ohsawa

IPC: H01L51/00 ,  C07F15/00 ,  H01L27/32 ,  H01L51/50

Abstract: An organometallic complex having a structure represented by the following general formula (G1) is provided. (In the formula, A represents an aromatic hydrocarbon group having 6 to 25 carbon atoms. Further, Z represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an aryl group having 6 to 25 carbon atoms. In addition, Ar1 represents an aryl group having 6 to 25 carbon atoms. R1 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. Further, M is a central metal and represents an element belonging to Group 9 or Group 10.)

公开(公告)号：US09978960B2

公开(公告)日：2018-05-22

申请号：US14300695

申请日：2014-06-10

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: H01L51/00 ,  C07F15/00

CPC classification number: H01L51/0085 ,  C07F15/0033

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.

公开(公告)号：US09741946B2

公开(公告)日：2017-08-22

申请号：US14134644

申请日：2013-12-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Yui Yamada ,  Nobuharu Ohsawa ,  Satoshi Seo

IPC: H01L29/08 ,  H01L29/04 ,  H01L29/15 ,  H01L33/00 ,  H01L51/00 ,  H01L51/50 ,  C09K11/06 ,  H01J1/63

CPC classification number: H01L51/0085 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1011 ,  C09K2211/1059 ,  C09K2211/185 ,  H01J1/63 ,  H01L51/0072 ,  H01L51/0074 ,  H01L51/5016

Abstract: An organometallic complex which can be provided at low cost and which emits blue phosphorescence is provided. An organometallic complex in which nitrogen at the 1-position of a 5-aryl-4H-1,2,4-triazole derivative is coordinated to a Group 9 metal or a Group 10 metal, the aryl group is bonded to the Group 9 metal or the Group 10 metal, and the 5-aryl-4H-1,2,4-triazole derivative is a 3-aryl-5,6,7,8-tetrahydro-4H-[1,2,4]triazolo[4,3-a]pyridine derivative is provided. The organometallic complex emits green to blue phosphorescence and is also advantageous in terms of cost.

公开(公告)号：US20160254461A1

公开(公告)日：2016-09-01

申请号：US15054772

申请日：2016-02-26

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hideko Inoue ,  Takahiro ISHISONE ,  Satoko SHITAGAKI ,  Takao HAMADA ,  Tomoka HARA

IPC: H01L51/00 ,  C07F15/00

CPC classification number: H01L51/0085 ,  C07F15/0033 ,  H01L51/5016

Abstract: An organometallic complex that has high emission efficiency and high heat resistance and emits blue light is provided as a novel substance. In a light-emitting element including a light-emitting layer between a pair of electrodes, the light-emitting layer includes an organometallic complex, and the organometallic complex includes a central metal and two types of ligands coordinated to the central metal. One of the two types of ligands includes a triazole skeleton including nitrogen bonded to the central metal, and the other includes a nitrogen-containing five-membered heterocyclic skeleton including carbene carbon bonded to the central metal and nitrogen bonded to carbene carbon.

Abstract translation: 提供具有高发光效率和高耐热性并发出蓝光的有机金属配合物作为新物质。 在包括一对电极之间的发光层的发光元件中，发光层包括有机金属络合物，有机金属络合物包括中心金属和与中心金属配位的两种配体。 两种配体中的一种包括三唑骨架，其包含与中心金属结合的氮，另一种包括含氮键合的五元杂环骨架，包括与中心金属键合的碳原子碳和与碳原子结合的氮。