公开(公告)号：US20230079236A1

公开(公告)日：2023-03-16

申请号：US17987188

申请日：2022-11-15

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：US20220069246A1

公开(公告)日：2022-03-03

申请号：US17610760

申请日：2020-05-07

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi SEO ,  Hiroshi KADOMA ,  Takumu OKUYAMA ,  Naoaki HASHIMOTO ,  Yusuke TAKITA ,  Tsunenori SUZUKI

IPC: H01L51/50

Abstract: A light-emitting device having a long lifetime is provided. In a light-emitting device that includes an EL layer between a pair of electrodes, the carrier balance is controlled with a hole-injection layer and an electron-transport layer of the EL layer having certain structures, so that the carrier balance spontaneously changes during driving and the initial degradation of the light-emitting device is inhibited. In addition, at this time, the rate of the spontaneous change is low when an electron-injection barrier at the interface between a light-emitting layer and the electron-transport layer of the EL layer which are stacked is high; thus, it is possible to obtain a light-emitting device which is excellent in terms of long-term degradation.

公开(公告)号：US20210296701A1

公开(公告)日：2021-09-23

申请号：US17334514

申请日：2021-05-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroshi KADOMA ,  Teppei OGUNI ,  Satoshi SEO

IPC: H01M10/0565 ,  C01B32/194 ,  C01B32/23 ,  C01B32/198 ,  H01M10/0585 ,  H01M50/116 ,  H01M10/0525

Abstract: A material that can be used in a wide temperature range is provided. A graphene compound includes graphene or graphene oxide and a substituted or unsubstituted chain group, the chain group includes two or more ether bonds, and the chain group is bonded to the above graphene or graphene oxide through a Si atom. Alternatively, a method for forming a graphene compound includes a first step and a second step after the first step. In the first step, graphene oxide and a base are stirred under a nitrogen stream. In the second step, the mixture is cooled to room temperature, a silylating agent that has a group having two or more ether bonds is introduced into the mixture, and the obtained mixture is stirred. The base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.

公开(公告)号：US20210184130A1

公开(公告)日：2021-06-17

申请号：US17116031

申请日：2020-12-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kyoko TAKEDA ,  Harue OSAKA ,  Hiroshi KADOMA ,  Satoshi SEO ,  Tsunenori SUZUKI ,  Naoaki HASHIMOTO

IPC: H01L51/00 ,  C07D493/04 ,  C09K11/06

Abstract: A novel organic compound with favorable thermophysical properties is provided. An organic compound represented by General Formula (G1) is provided. At least one of X1 to X5 is a secondary or tertiary alkyl group having 3 to 6 carbon atoms in which a carbon atom bonded to a phenyl group branches. Each of R1 to R7 is independently any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and an unsubstituted or alkyl-substituted aryl group having 6 to 13 carbon atoms. Ar1 represents a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more aromatic rings, and Ar2 represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Furthermore, n is any of 1 to 3.

公开(公告)号：US20210028371A1

公开(公告)日：2021-01-28

申请号：US16937793

申请日：2020-07-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takumu OKUYAMA ,  Naoaki HASHIMOTO ,  Yusuke TAKITA ,  Hiroshi KADOMA ,  Tsunenori SUZUKI ,  Satoshi SEO ,  Tomoya HIROSE

IPC: H01L51/00 ,  C07D491/048 ,  C07D401/10

Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device having a long lifetime is provided. A light-emitting device with low driving voltage is provided. The light-emitting device includes an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes a light-emitting layer and an electron-transport layer. The electron-transport layer is positioned between the light-emitting layer and the cathode. The electron-transport layer contains an electron-transport material. The electron-transport material is an organic compound including a first skeleton, a second skeleton, and a third skeleton. The first skeleton has a function of transporting electrons. The second skeleton has a function of accepting holes. The third skeleton includes a monocyclic π-electron deficient heteroaromatic ring.

公开(公告)号：US20200013966A1

公开(公告)日：2020-01-09

申请号：US16573475

申请日：2019-09-17

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Tomoya HIROSE ,  Hiroshi KADOMA ,  Satoko SHITAGAKI ,  Satoshi SEO

IPC: H01L51/00

Abstract: A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved is provided. The organic compound has an imidazo[1,2-f]phenanthridine skeleton and a dibenzothiophene skeleton or a dibenzofuran skeleton bonded through an arylene group. The light-emitting element including the organic compound in a light-emitting layer shows high efficiency and low power consumption.

公开(公告)号：US20200006809A1

公开(公告)日：2020-01-02

申请号：US16544958

申请日：2019-08-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroshi KADOMA ,  Teppei OGUNI ,  Satoshi SEO

IPC: H01M10/0565 ,  H01M2/02 ,  H01M10/0525 ,  C01B32/194 ,  C01B32/23 ,  C01B32/198 ,  H01M10/0585

Abstract: A material that can be used in a wide temperature range is provided. A graphene compound includes graphene or graphene oxide and a substituted or unsubstituted chain group, the chain group includes two or more ether bonds, and the chain group is bonded to the above graphene or graphene oxide through a Si atom. Alternatively, a method for forming a graphene compound includes a first step and a second step after the first step. In the first step, graphene oxide and a base are stirred under a nitrogen stream. In the second step, the mixture is cooled to room temperature, a silylating agent that has a group having two or more ether bonds is introduced into the mixture, and the obtained mixture is stirred. The base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.

公开(公告)号：US20190074450A1

公开(公告)日：2019-03-07

申请号：US16169108

申请日：2018-10-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Harue OSAKA ,  Takako TAKASU ,  Hiroshi KADOMA ,  Yuko KAWATA ,  Satoko SHITAGAKI ,  Hiromi NOWATARI ,  Tsunenori SUZUKI ,  Nobuharu OHSAWA ,  Satoshi SEO

IPC: H01L51/00 ,  H01L51/50 ,  C09K11/06 ,  C07D209/86

Abstract: A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R1, R2, Ar3, and α3). Further, a subsistent which makes the band gap (Bg) and the T1 level of a compound in which a bond of the substituent is substituted with hydrogen wide and high is used as each of the substituents in General Formula (G1) (R1, R2, Ar3, and α3).

公开(公告)号：US20180047911A1

公开(公告)日：2018-02-15

申请号：US15797463

申请日：2017-10-30

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroshi KADOMA ,  Satomi MITSUMORI ,  Yuko KAWATA ,  Takao HAMADA ,  Satoshi SEO

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

CPC classification number: H01L51/0067 ,  C09K11/06 ,  H01L51/0072 ,  H01L51/0073 ,  H01L51/0074 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/5088 ,  H01L51/5092

Abstract: A novel organic compound that can be used as a carrier-transport material, a host material, or a light-emitting material in a light-emitting element is provided. Specifically, an organic compound that can give a light-emitting element having favorable characteristics even when the organic compound is used in a light-emitting element emitting phosphorescence is provided. The organic compound has a bipyridine skeleton formed by two pyridine skeletons to each of which a dibenzothiophenyl group or a dibenzofuranyl group is bonded via an arylene group.

公开(公告)号：US20170222161A1

公开(公告)日：2017-08-03

申请号：US15428634

申请日：2017-02-09

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroshi KADOMA ,  Yasushi KITANO ,  Satoko SHITAGAKI ,  Nobuharu OHSAWA ,  Satoshi SEO

IPC: H01L51/00 ,  C07D409/10 ,  C09K11/06 ,  C09K11/02

CPC classification number: H01L51/0072 ,  C07D403/10 ,  C07D405/10 ,  C07D409/10 ,  C09K11/025 ,  C09K11/06 ,  C09K2211/1007 ,  C09K2211/1014 ,  C09K2211/1029 ,  C09K2211/1044 ,  C09K2211/185 ,  H01L51/0052 ,  H01L51/0056 ,  H01L51/0058 ,  H01L51/0073 ,  H01L51/0074 ,  H01L51/0085 ,  H01L51/5012 ,  H01L51/5016 ,  H01L51/5056 ,  H01L51/5072 ,  H01L51/508 ,  H01L51/5206 ,  H01L51/5221 ,  H05B33/14

Abstract: Provided is a novel heterocyclic compound which can be used for a light-emitting element, as a host material of a light-emitting layer in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, A represents any of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group, R11 to R19 separately represent any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and Ar represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms.