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    Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Organic Compound
    123.
    发明申请
    Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Organic Compound 有权

    公开(公告)号：US20250120314A1

    公开(公告)日：2025-04-10

    申请号：US18916130

    申请日：2024-10-15

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Satoshi SEO ,  Takao HAMADA ,  Tatsuyoshi TAKAHASHI ,  Yasushi KITANO ,  Hiroki SUZUKI ,  Hideko INOUE

    IPC: H10K85/60 ,  C07D403/14 ,  H10K85/30

    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 DEVICE, LIGHT-EMITTING APPARATUS, DISPLAY DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE
    124.
    发明申请
    LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPARATUS, DISPLAY DEVICE, ELECTRONIC APPLIANCE, AND LIGHTING DEVICE 有权

    公开(公告)号：US20250098526A1

    公开(公告)日：2025-03-20

    申请号：US18958128

    申请日：2024-11-25

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Nobuharu OHSAWA ,  Satoshi SEO

    IPC: H10K85/60 ,  H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K85/30 ,  H10K85/40 ,  H10K101/10 ,  H10K101/40

    Abstract: A light-emitting device with high emission efficiency and high reliability is provided. The light-emitting device includes a host material and a guest material in a light-emitting layer. The host material has a function of converting triplet excitation energy into light emission and the guest material emits fluorescence. The guest material has a molecular structure including a luminophore and protecting groups, and five or more protecting groups are included in one molecule of the guest materials. When the protecting groups are introduced into the molecule, triplet excitation energy transfer from the host material to the guest material by the Dexter mechanism is inhibited. As the protecting group, an alkyl group or a branched-chain alkyl group is used. A light-emitting device with improved emission efficiency can be obtained with the use of a material having a five-membered ring skeleton in the host material.

    LIGHT-EMITTING DEVICE, DISPLAY DEVICE, AND ELECTRONIC DEVICE
    126.
    发明申请
    LIGHT-EMITTING DEVICE, DISPLAY DEVICE, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20250031515A1

    公开(公告)日：2025-01-23

    申请号：US18904124

    申请日：2024-10-02

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Satoshi SEO ,  Nobuharu OHSAWA

    IPC: H10K50/11 ,  H10K50/13 ,  H10K59/32 ,  H10K59/35 ,  H10K59/38 ,  H10K101/40

    Abstract: A light-emitting device, an electronic device, and a display device each consume less power are provided. The light-emitting device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element that share an EL layer. The EL layer includes a layer containing a light-emitting material that emits blue fluorescence and a layer containing a light-emitting material that emits yellow or green phosphorescence. Light emitted from the second light-emitting element enters a color filter layer or a second color conversion layer, and light emitted from the third light-emitting element enters a first color conversion layer.

    LIGHT-EMITTING APPARATUS, DISPLAY DEVICE, AND ELECTRONIC APPLIANCE
    127.
    发明申请
    LIGHT-EMITTING APPARATUS, DISPLAY DEVICE, AND ELECTRONIC APPLIANCE 有权

    公开(公告)号：US20250024741A1

    公开(公告)日：2025-01-16

    申请号：US18710336

    申请日：2022-11-16

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Takeyoshi WATABE ,  Nobuharu OHSAWA ,  Satoshi SEO

    IPC: H10K59/80 ,  H10K50/15 ,  H10K50/17 ,  H10K50/18

    Abstract: A light-emitting apparatus with high emission efficiency is provided. A light-emitting apparatus including a light-emitting device A and a light-emitting device B is provided. The light-emitting device A includes a first electrode A, a second electrode A, a light-emitting layer A interposed between the first electrode A and the second electrode A, and a first layer A interposed between the first electrode A and the light-emitting layer A. The light-emitting device B includes a first electrode B, a second electrode B, a light-emitting layer B interposed between the first electrode B and the second electrode B, a first layer B interposed between the first electrode B and the light-emitting layer B, and a second layer B interposed between the first electrode B and the light-emitting layer B. The light-emitting layer A contains a light-emitting substance A. The light-emitting layer B contains a light-emitting substance B. An emission peak wavelength of the light-emitting substance A is shorter than an emission peak wavelength of the light-emitting substance B. The first layer A and the first layer B contain the same material. An ordinary refractive index of the second layer B is lower than an ordinary refractive index of the first layer A by a value 0.15 or more, with respect to the emission peak wavelength of the light-emitting substance B.

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