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    LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE
    5.
    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, Light-Emitting Device, Electronic Device, and Lighting Device
    9.
    发明申请
    Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device 审中-公开

    公开(公告)号：US20190088897A1

    公开(公告)日：2019-03-21

    申请号：US16183838

    申请日：2018-11-08

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Satoshi SEO ,  Tsunenori SUZUKI ,  Satoko SHITAGAKI

    IPC: H01L51/50 ,  H01L51/00

    Abstract: Objects of the present invention are to provide: a light-emitting element having a long lifetime and good emission efficiency and drive voltage. One embodiment of the invention is a light-emitting element including, between an anode and a cathode, at least a stack structure in which a first layer, a second layer, and a light-emitting layer are provided in order from the anode side. The first layer includes a first organic compound and an electron-accepting compound. The second layer includes a second organic compound having a HOMO level differing from the HOMO level of the first organic compound by from −0.2 eV to +0.2 eV. The light-emitting layer includes a third organic compound having a HOMO level differing from the HOMO level of the second organic compound by from −0.2 eV to +0.2 eV and a light-emitting substance having a hole-trapping property with respect to the third organic compound.

    LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, LIGHTING SYSTEM, AND GUIDANCE SYSTEM
    10.
    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.

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