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    LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, LIGHTING SYSTEM, AND GUIDANCE SYSTEM
    3.
    发明申请
    LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, LIGHTING SYSTEM, AND GUIDANCE SYSTEM 审中-公开

    公开(公告)号：US20180358562A1

    公开(公告)日：2018-12-13

    申请号：US15779661

    申请日：2016-12-06

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Yusuke TAKITA ,  Satoshi SEO ,  Tsunenori SUZUKI ,  Harue OSAKA

    IPC: H01L51/00 ,  C07D333/76 ,  H05B33/08 ,  H05B37/02

    CPC classification number: H01L51/0061 ,  C07D333/76 ,  C09K11/06 ,  H01L51/0074 ,  H01L51/50 ,  H01L51/5064 ,  H01L2251/552 ,  H05B33/0896 ,  H05B37/02 ,  H05B37/0218

    Abstract: An object is to provide a light-emitting element with a favorable lifetime.A light-emitting element which includes a first electrode, a second electrode, and an EL layer and in which the EL layer includes a hole-injection layer and first to fourth layers; the hole-injection layer includes an organic acceptor and is positioned between the first electrode and the first layer; the first layer includes a first hole-transport material; the second layer includes a second hole-transport material and is positioned between the first layer and the third layer; the third layer includes a third hole-transport material; the fourth layer includes a host material and a light-emitting material and is positioned between the third layer and the second electrode; the HOMO level of the second hole-transport material is deeper than the HOMO level of the first hole-transport material; the HOMO level of the host material is deeper than the second hole-transport material HOMO level; the HOMO level of the third hole-transport material is deeper than or equal to the HOMO level of the host material; a difference between the HOMO level of the second hole-transport material and the HOMO level of the third hole-transport material is less than or equal to 0.3 eV; and the second hole-transport material is a triarylamine compound having a structure where a dibenzofuran skeleton or a dibenzothiophene skeleton is bonded to nitrogen of an amine directly or via a divalent aromatic hydrocarbon group.

    Light-Emitting Device, Light-Emitting Apparatus, Electronic Device, and Lighting Device
    7.
    发明公开
    Light-Emitting Device, Light-Emitting Apparatus, Electronic Device, and Lighting Device 审中-公开

    公开(公告)号：US20230301126A1

    公开(公告)日：2023-09-21

    申请号：US18134847

    申请日：2023-04-14

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Satoshi SEO ,  Tsunenori SUZUKI ,  Yusuke TAKITA ,  Takumu OKUYAMA ,  Anna TADA

    IPC: H10K50/11 ,  H10K50/15

    CPC classification number: H10K50/11 ,  H10K50/15 ,  H10K2101/40

    Abstract: A novel light-emitting device is provided. Alternatively, a light-emitting device with favorable emission efficiency is provided. Alternatively, a light-emitting device with a favorable lifetime is provided. Alternatively, a light-emitting device with a low driving voltage is provided. Provided is a light-emitting device including an anode, a cathode, and a layer including an organic compound that is positioned between the anode and the cathode, in which the layer including the organic compound includes a first layer, a second layer, and a light-emitting layer in this order from the anode side, the first layer includes a first substance and a second substance, the second layer includes a third substance, the first substance is an organic compound a HOMO level of which is higher than or equal to -5.8 eV and lower than or equal to -5.4 eV, the second substance is a substance that has an electron-acceptor property with respect to the first substance, and the third substance is an organic compound having a structure in which at least two substituents comprising carbazole rings are bonded to a naphthalene ring.

    Light-Emitting Device, Light-Emitting Apparatus, Electronic Device, and Lighting Device
    9.
    发明申请
    Light-Emitting Device, Light-Emitting Apparatus, Electronic Device, and Lighting Device 有权

    公开(公告)号：US20210126213A1

    公开(公告)日：2021-04-29

    申请号：US16981793

    申请日：2019-03-13

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Satoshi SEO ,  Tsunenori SUZUKI ,  Yusuke TAKITA ,  Takumu OKUYAMA ,  Anna TADA

    IPC: H01L51/50

    Abstract: A novel light-emitting device is provided. Alternatively, a light-emitting device with favorable emission efficiency is provided. Alternatively, a light-emitting device with a favorable lifetime is provided. Alternatively, a light-emitting device with a low driving voltage is provided. Provided is a light-emitting device including an anode, a cathode, and a layer including an organic compound that is positioned between the anode and the cathode, in which the layer including the organic compound includes a first layer, a second layer, and a light-emitting layer in this order from the anode side, the first layer includes a first substance and a second substance, the second layer includes a third substance, the first substance is an organic compound a HOMO level of which is higher than or equal to −5.8 eV and lower than or equal to −5.4 eV, the second substance is a substance that has an electron-acceptor property with respect to the first substance, and the third substance is an organic compound having a structure in which at least two substituents comprising carbazole rings are bonded to a naphthalene ring.

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