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    Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device
    61.
    发明申请
    Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device 有权

    公开(公告)号：US20210202866A1

    公开(公告)日：2021-07-01

    申请号：US17198566

    申请日：2021-03-11

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Tsunenori Suzuki ,  Naoaki HASHIMOTO ,  Eriko SAIJO ,  Satoshi SEO

    IPC: H01L51/00 ,  H01L51/50

    Abstract: A light-emitting element which includes a plurality of light-emitting layers between a pair of electrodes and has low driving voltage and high emission efficiency is provided. A light-emitting element including first to third light-emitting layers between a cathode and an anode is provided. The first light-emitting layer includes a first phosphorescent material and a first electron-transport material; the second light-emitting layer includes a second phosphorescent material and a second electron-transport material; the third light-emitting layer includes a fluorescent material and a third electron-transport material; the first to third light-emitting elements are provided in contact with an electron-transport layer positioned on a cathode side; and a triplet excitation energy level of a material included in the electron-transport layer is lower than triplet excitation energy levels of the first electron-transport material and the second electron-transport material.

    Light-Emitting Device, Light-Emitting Apparatus, Display Apparatus, Electronic Device, Lighting Device
    67.
    发明申请
    Light-Emitting Device, Light-Emitting Apparatus, Display Apparatus, Electronic Device, Lighting Device 有权

    公开(公告)号：US20240389377A1

    公开(公告)日：2024-11-21

    申请号：US18289091

    申请日：2022-04-28

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Naoaki HASHIMOTO ,  Satoshi SEO ,  Tsunenori SUZUKI ,  Hiromi SEO

    IPC: H10K50/16 ,  C07D401/10 ,  H10K50/15 ,  H10K85/60 ,  H10K101/30

    Abstract: A novel light-emitting device that is highly convenient, useful, or reliable is provided. The light-emitting device includes a first electrode, a second electrode, a first unit, and a first layer, and the first unit is held between the first electrode and the second electrode and includes a second layer, a third layer, and a fourth layer. The second layer is held between the third layer and the fourth layer, and the second layer contains a light-emitting material. The fourth layer is held between the second layer and the second electrode and contains a first organic compound. The first organic compound has a π-electron deficient heteroaromatic ring skeleton and a π-electron rich heteroaromatic ring skeleton and has a HOMO level higher than or equal to −6.0 eV and lower than or equal to −5.6 eV. The first layer is held between the first electrode and the first unit, is in contact with the first electrode, and contains a second organic compound and a third organic compound.

    LIGHT-EMITTING APPARATUS
    68.
    发明公开
    LIGHT-EMITTING APPARATUS 审中-公开

    公开(公告)号：US20240324307A1

    公开(公告)日：2024-09-26

    申请号：US18578120

    申请日：2022-07-08

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Nobuharu OHSAWA ,  Toshiki SASAKI ,  Tsunenori SUZUKI ,  Naoaki HASHIMOTO

    IPC: H10K59/122

    CPC classification number: H10K59/122

    Abstract: A high-resolution light-emitting apparatus that emits blue light with a high blue index is provided. The light-emitting apparatus includes a pixel electrode A; a pixel electrode B adjacent to the pixel electrode A; a common electrode; an EL layer A sandwiched between the pixel electrode A and the common electrode; an EL layer B sandwiched between the pixel electrode B and the common electrode; and an insulating layer positioned between the common electrode and each of the EL layer A and the EL layer B. The insulating layer has an opening portion A overlapping with the pixel electrode A and an opening portion B overlapping with the pixel electrode B. The EL layer A includes a light-emitting layer A. The light-emitting layer A contains a light-emitting substance A. The light-emitting substance A emits blue light. The EL layer A is in contact with the pixel electrode A. The EL layer B is in contact with the pixel electrode B. The EL layer A is in contact with the common electrode in the opening portion A. The EL layer B is in contact with the common electrode in the opening portion B.

    Light-Emitting Device, Light-Emitting Apparatus, Electronic Appliance, and Lighting Device
    69.
    发明公开
    Light-Emitting Device, Light-Emitting Apparatus, Electronic Appliance, and Lighting Device 审中-公开

    公开(公告)号：US20240315066A1

    公开(公告)日：2024-09-19

    申请号：US18276508

    申请日：2022-01-28

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Yui YOSHIYASU ,  Naoaki HASHIMOTO ,  Tatsuyoshi TAKAHASHI ,  Sachiko KAWAKAMI ,  Satoshi SEO

    IPC: H10K50/16 ,  H10K50/844 ,  H10K85/30 ,  H10K85/60

    CPC classification number: H10K50/166 ,  H10K50/844 ,  H10K85/342 ,  H10K85/615 ,  H10K85/626 ,  H10K85/633 ,  H10K85/636 ,  H10K85/6572

    Abstract: A light-emitting device having high heat resistance in a manufacturing process is provided. Provided is a light-emitting device which includes a second electrode over a first electrode with a first EL layer therebetween and in which the first EL layer includes at least a first light-emitting layer; a second EL layer is over the first EL layer; the second EL layer includes at least a second light-emitting layer, a first electron-transport layer, and a second electron-transport layer; the first electron-transport layer is over the second light-emitting layer; an insulating layer is in contact with the side surface of the first light-emitting layer, the side surface of the second light-emitting layer, and the side surface of the first electron-transport layer; the second electron-transport layer is over the first electron-transport layer; the insulating layer is positioned between the second electron-transport layer and the side surface of the first light-emitting layer, the side surface of the second light-emitting layer, and the side surface of the first electron-transport layer; and the first electron-transport layer includes a heteroaromatic compound including at least one heteroaromatic ring and an organic compound different from the heteroaromatic compound.

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