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    LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE
    13.
    发明申请
    LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE 有权

    公开(公告)号：US20230124044A1

    公开(公告)日：2023-04-20

    申请号：US17819433

    申请日：2022-08-12

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Tsunenori SUZUKI ,  Sachiko KAWAKAMI ,  Naoaki HASHIMOTO ,  Satoshi SEO

    IPC: H01L51/00

    Abstract: A light-emitting device with high emission efficiency is provided. The light-emitting device includes at least a light-emitting layer between an anode and a cathode. The light-emitting layer contains a light-emitting substance, a first organic compound, and a second organic compound. The light-emitting substance is a substance that emits fluorescent light. The first organic compound has any one of an anthracene skeleton, a tetracene skeleton, a phenanthrene skeleton, a pyrene skeleton, a chrysene skeleton, a carbazole skeleton, a benzocarbazole skeleton, a dibenzocarbazole skeleton, a dibenzofuran skeleton, a benzonaphthofuran skeleton, a bisnaphthofuran skeleton, a dibenzothiophene skeleton, a benzonaphthothiophene skeleton, a bisnaphthothiophene skeleton, and a fluoranthene skeleton. The second organic compound has any one of a fluorenylamine skeleton, a spirobifluorenylamine skeleton, a dibenzofuranylamine skeleton, a carbazolamine skeleton, a benzocarbazolamine skeleton, a dibenzocarbazolamine skeleton, a dibenzofuranamine skeleton, a benzonaphthofuranamine skeleton, a bisnaphthofuranamine skeleton, a dibenzothiophenamine skeleton, a benzonaphthothiopheneamine skeleton, a bisnaphthothiopheneamine skeleton, and an arylamine skeleton.

    LIGHT-EMITTING ELEMENT, DISPLAY DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE
    14.
    发明申请
    LIGHT-EMITTING ELEMENT, DISPLAY DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE 有权

    公开(公告)号：US20230095777A1

    公开(公告)日：2023-03-30

    申请号：US17980869

    申请日：2022-11-04

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Satoshi SEO ,  Nobuharu OHSAWA ,  Takeyoshi WATABE

    IPC: H01L51/50

    Abstract: Provided is a light-emitting element including a fluorescence-emitting material with high emission efficiency. The light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first organic compound, a second organic compound, and a guest material. The first organic compound has a function of emitting a thermally activated delayed fluorescence at room temperature. The guest material has a function of emitting fluorescence. A HOMO level of the first organic compound higher than or equal to a HOMO level of the second organic compound. A LUMO level of the first organic compound is lower than or equal to a LUMO level of the second organic compound.

    Light-Emitting Device, Light-Emitting Apparatus, Electronic Device, and Lighting Device
    15.
    发明申请
    Light-Emitting Device, Light-Emitting Apparatus, Electronic Device, and Lighting Device 有权

    公开(公告)号：US20230037397A1

    公开(公告)日：2023-02-09

    申请号：US17780247

    申请日：2020-11-18

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Takeyoshi WATABE ,  Airi UEDA ,  Nobuharu OHSAWA ,  Satoshi SEO

    IPC: H01L51/52

    Abstract: A near-infrared organic EL device with favorable efficiency is provided. A light-emitting device including a first electrode, a second electrode, and an EL layer is provided; in which the EL layer is positioned between the first electrode and the second electrode; in which the EL layer emits light having a peak of an emission spectrum in a wavelength range of greater than or equal to 750 nm and less than or equal to 1000 nm; in which one of the first electrode and the second electrode is an electrode having a transmitting property with respect to light with a peak wavelength of the emission spectrum of the EL layer; in which a first layer is provided in contact with a surface of the electrode having a transmitting property, which is opposite to a surface facing the EL layer; in which the first layer contains an organic compound; and in which the first layer has the local maximum value of an extinction coefficient k in the visible light region.

    DISPLAY APPARATUS AND DISPLAY SYSTEM
    17.
    发明申请
    DISPLAY APPARATUS AND DISPLAY SYSTEM 有权

    公开(公告)号：US20220392982A1

    公开(公告)日：2022-12-08

    申请号：US17833926

    申请日：2022-06-07

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Shunpei YAMAZAKI ,  Takayuki IKEDA ,  Satoshi SEO ,  Sachiko KAWAKAMI ,  Daiki NAKAMURA

    IPC: H01L27/32 ,  G02B27/01

    Abstract: A display apparatus with a high level of immersion or realistic sensation is provided. The display apparatus includes a display portion capable of full-color display, a communication portion having a wireless communication function, and a wearing portion that can be worn on a head. In an emission spectrum of blue display provided by the display portion at a first luminance, when the intensity of a first emission peak at a wavelength higher than or equal to 400 nm and lower than 500 nm is 1, the intensity of a second emission peak at a wavelength higher than or equal to 500 nm and lower than or equal to 700 nm in the emission spectrum is 0.5 or lower. The first luminance is any value higher than 0 cd/m2 and lower than 1 cd/m2.

    LIGHT-EMITTING DEVICE, DISPLAY DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC DEVICE, AND LIGHTING DEVICE
    19.
    发明申请
    LIGHT-EMITTING DEVICE, DISPLAY DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC DEVICE, AND LIGHTING DEVICE 有权

    公开(公告)号：US20220278292A1

    公开(公告)日：2022-09-01

    申请号：US17672799

    申请日：2022-02-16

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Takeyoshi WATABE ,  Airi UEDA ,  Yuta KAWANO ,  Nobuharu OHSAWA ,  Satoshi SEO

    IPC: H01L51/50 ,  H01L51/52

    Abstract: A light-emitting device with high emission efficiency is provided. The light-emitting device includes a first electrode, a second electrode, and an EL layer positioned between the first electrode and the second electrode. The EL layer includes at least a light-emitting layer, a first layer, a second layer, and a third layer. The first layer is positioned between the first electrode and the light-emitting layer. The third layer is positioned between the first layer and the light-emitting layer. The second layer is positioned between the first layer and the third layer. The first layer includes a first organic compound. The second layer includes a second organic compound. The third layer includes a third organic compound. The ordinary refractive index of the second organic compound is higher than the ordinary refractive indices of the first organic compound and the third organic compound.

    LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPLIANCE, DISPLAY DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE
    20.
    发明申请
    LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPLIANCE, DISPLAY DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE 有权

    公开(公告)号：US20220267668A1

    公开(公告)日：2022-08-25

    申请号：US17608213

    申请日：2020-04-28

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Takahiro ISHISONE ,  Nobuharu OHSAWA ,  Satoshi SEO

    IPC: C09K11/06 ,  H01L51/50 ,  H01L27/32 ,  H01L51/00

    Abstract: A light-emitting device with high emission efficiency and reliability is provided. The light-emitting device includes first and second light-emitting units. The first light-emitting unit includes a first light-emitting layer; the first light-emitting layer includes a first material and a second material; the first material has a function of converting triplet excitation energy into light emission; the second material has a function of converting singlet excitation energy into light emission and includes a luminophore and five or more protecting groups; the luminophore is a condensed aromatic ring or a condensed heteroaromatic ring; the five or more protecting groups each independently have any one of an alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 carbon atoms, and a trialkylsilyl group having 3 to 12 carbon atoms; and light emission is obtained from the second material.

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