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    Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device
    132.
    发明申请
    Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device 有权

    公开(公告)号：US20210098718A1

    公开(公告)日：2021-04-01

    申请号：US17120532

    申请日：2020-12-14

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Hideko Inoue ,  Miki Kanamoto ,  Satoshi Seo

    IPC: H01L51/00 ,  H01L27/32 ,  C07F15/00 ,  C09K11/06

    Abstract: An object is to provide a novel organometallic complex. Another object is to provide an organometallic complex that can exhibit yellow to blue phosphorescence. A platinum complex with a tetracoordinate ligand including a phenothiazine skeleton or a phenoxazine skeleton is provided. In the ligand, nitrogen at the 10-position and carbon at the 2-position of the phenothiazine skeleton or the phenoxazine skeleton have a pyridyl group and a phenoxy group, respectively. A five-membered heteroaromatic residue is present at the 3-position of the phenoxy group. The five-membered heteroaromatic residue has two or three nitrogen atoms in its skeleton. Carbon at the 1-position of the phenothiazine skeleton or the phenoxazine skeleton and carbon at the 2-position of the phenoxy group are bonded to platinum, and nitrogen of the pyridyl group and nitrogen or carbene carbon of the five-membered heteroaromatic residue are coordinated to platinum.

    Light-emitting device using organometallic complex having a pyrazine skeleton
    134.
    发明授权
    Light-emitting device using organometallic complex having a pyrazine skeleton 有权

    公开(公告)号：US10764974B2

    公开(公告)日：2020-09-01

    申请号：US16157497

    申请日：2018-10-11

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Nobuharu Ohsawa ,  Hideko Inoue ,  Satoshi Seo

    IPC: H01L51/54 ,  H05B33/14 ,  C09K11/06 ,  H01L51/00 ,  H01L51/50

    Abstract: Light-emitting elements having high emission efficiency and long lifetime can be provided. By forming light-emitting devices including the light-emitting elements, the light-emitting devices having low power consumption and long lifetime can be provided. A light-emitting device comprises a light-emitting element including a light-emitting layer between a first electrode and a second electrode. The light-emitting layer includes a first organic compound having a hole-transporting property, a second organic compound having an electron transporting property, and an organometallic complex. A central metal of the organometallic complex is an element belonging to one of Group 9 and Group 10, and a ligand of the organometallic complex is a ligand having a pyrazine skeleton.

    Light-emitting element, light-emitting device, electronic device, lighting device, and organic compound
    137.
    发明授权
    Light-emitting element, light-emitting device, electronic device, lighting device, and organic compound 有权

    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.

    Light-emitting element
    138.
    发明授权
    Light-emitting element 有权

    公开(公告)号：US10367160B2

    公开(公告)日：2019-07-30

    申请号：US15492439

    申请日：2017-04-20

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

    IPC: H01L51/50 ,  C07D409/10 ,  C09K11/06 ,  H01L51/00 ,  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.

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