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    Mixed Material For Light-Emitting Device
    31.
    发明申请
    Mixed Material For Light-Emitting Device 有权

    公开(公告)号：US20220336755A1

    公开(公告)日：2022-10-20

    申请号：US17703524

    申请日：2022-03-24

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Yui Yoshiyasu ,  Naoaki Hashimoto ,  Tatsuyoshi Takahashi ,  Sachiko Kawakami ,  Satoshi Seo

    IPC: H01L51/00

    Abstract: A novel mixed material for a light-emitting device with improved heat resistance is provided. The mixed material for a light-emitting device includes a first heteroaromatic compound and a second heteroaromatic compound. The first heteroaromatic compound includes a first heteroaromatic ring. The first heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. The second heteroaromatic compound includes a second heteroaromatic ring. The second heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. A structure of the first heteroaromatic ring is different from a structure of the second heteroaromatic ring.

    LIGHT-EMITTING DEVICE, DISPLAY DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC DEVICE, AND LIGHTING DEVICE
    32.
    发明申请
    LIGHT-EMITTING DEVICE, DISPLAY DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC DEVICE, AND LIGHTING DEVICE 有权

    公开(公告)号：US20220320470A1

    公开(公告)日：2022-10-06

    申请号：US17695982

    申请日：2022-03-16

    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

    Inventor： Takeyoshi Watabe ,  Yuta Kawano ,  Airi Ueda ,  Nobuharu Ohsawa ,  Satoshi Seo

    IPC: H01L51/52

    Abstract: A light-emitting device with high emission efficiency is provided. The light-emitting device includes an EL layer and a light-transmitting electrode. The EL layer includes a light-emitting layer and a low refractive index layer. The low refractive index layer is positioned between the light-emitting layer and the light-transmitting electrode. A cap layer is in contact with a surface of the light-transmitting electrode on the side opposite to the EL layer. The cap layer includes a high refractive index material having an ordinary refractive index of higher than or equal to 1.90 and lower than or equal to 2.40 and an ordinary extinction coefficient of higher than or equal to 0 and lower than or equal to 0.01. The low refractive index layer includes a low refractive index material having an ordinary refractive index of higher than or equal to 1.60 and lower than or equal to 1.70.

    Light-emitting element, display device, electronic device, and lighting device
    33.
    发明授权
    Light-emitting element, display device, electronic device, and lighting device 有权

    公开(公告)号：US11462702B2

    公开(公告)日：2022-10-04

    申请号：US17161982

    申请日：2021-01-29

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Satomi Mitsumori ,  Takeyoshi Watabe ,  Satoshi Seo ,  Yuko Kubota

    IPC: H01L51/50 ,  H01L27/32 ,  H01L51/00 ,  H01L51/52

    Abstract: A light-emitting element having low driving voltage and high emission efficiency is provided. In the light-emitting element, a combination of a guest material and a host material forms an exciplex. The guest material is capable of converting triplet excitation energy into light emission. Light emission from the light-emitting layer includes light emission from the guest material and light emission from the exciplex. The percentage of the light emission from the exciplex to the light emission from the light-emitting layer is greater than 0 percent and less than or equal to 60 percent. The energy after subtracting the energy of light emission from the exciplex from the energy of light emission from the guest material is greater than 0 eV and less than or equal to 0.23 eV.

    Light-emitting device and electronic device
    35.
    发明授权
    Light-emitting device and electronic device 有权

    公开(公告)号：US11387280B2

    公开(公告)日：2022-07-12

    申请号：US16797167

    申请日：2020-02-21

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Satoshi Seo ,  Toshiki Sasaki ,  Ryohei Yamaoka

    IPC: H01L27/32 ,  H01L51/50 ,  H01L51/52

    Abstract: Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.170 and a chromaticity y of greater than or equal to 0.020 and less than 0.060.

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