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    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
    2.
    发明公开
    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20230171977A1

    公开(公告)日：2023-06-01

    申请号：US17918267

    申请日：2021-04-13

    Applicant: IDEMITSU KOSAN CO.,LTD.

    Inventor： Satomi TASAKI ,  Tetsuya MASUDA ,  Hiroaki TOYOSHIMA ,  Masato NAKAMURA

    IPC: H10K50/12

    CPC classification number: H10K50/12 ,  H10K2101/00

    Abstract: An organic EL device includes a first emitting layer and a second emitting layer. The first emitting layer contains a first host material and a first dopant material. The second emitting layer contains a second host material and a second dopant material. The first host material and the second host material are different from each other. The first dopant material is a compound having a maximum peak wavelength of 500 nm or less. The second dopant material is a compound having a maximum peak wavelength of 500 nm or less. The first dopant material and the second dopant material are different from each other. A triplet energy T1(H1) of the first host material and a triplet energy T1(H2) of the second host material satisfy a relationship of a numerical formula (Numerical Formula 1),


    T1(H1)>T1(H2)   (Numerical Formula 1).

    ORGANIC ELECTROLUMINESCENT ELEMENT EMITTING LIGHT AT HIGH LUMINOUS EFFICIENCY AND ELECTRONIC DEVICE
    3.
    发明申请
    ORGANIC ELECTROLUMINESCENT ELEMENT EMITTING LIGHT AT HIGH LUMINOUS EFFICIENCY AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20220310930A1

    公开(公告)日：2022-09-29

    申请号：US17746587

    申请日：2022-05-17

    Applicant: IDEMITSU KOSAN CO.,LTD.

    Inventor： Satomi TASAKI ,  Kazuki NISHIMURA ,  Tasuku HAKETA ,  Ryoji MAEDA ,  Yuki NAKANO ,  Hiroaki TOYOSHIMA

    IPC: H01L51/00

    Abstract: An organic electroluminescence device includes: a first emitting layer disposed between an anode and a cathode; a second emitting layer disposed between the first emitting layer and the cathode; and an electron blocking layer disposed between the first emitting layer and the anode, in which the first emitting layer and the second emitting layer are in direct contact with each other; the first emitting layer and the electron blocking layer are in direct contact with each other; the first emitting layer includes a first compound represented by a formula (1) below; the first compound includes at least one group represented by a formula (11) below; the second emitting layer includes a second compound represented by a formula (2); the electron blocking layer includes a third compound; and the third compound satisfies a formula (M1) below.

    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
    4.
    发明申请
    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20210242419A1

    公开(公告)日：2021-08-05

    申请号：US15734761

    申请日：2019-06-04

    Applicant: IDEMITSU KOSAN CO.,LTD.

    Inventor： Masato NAKAMURA ,  Emiko KAMBE ,  Hiroaki TOYOSHIMA ,  Kazuki NISHIMURA ,  Hitoshi KUMA

    IPC: H01L51/50 ,  H01L51/52

    Abstract: An organic electroluminescence device includes a first emitting unit, a first charge generating layer, a second emitting unit, a second charge generating layer, and a third emitting unit provided between an anode and a cathode in this order from the anode, in which the second charge generating layer includes an N layer close to the anode and a P layer close to the cathode, the third emitting layer contains a blue fluorescent compound, at least one of the first or second emitting layer contains a blue fluorescent compound, the third emitting unit includes a hole transporting zone between the second charge generating layer and the third emitting layer, the hole transporting zone is in contact with the second charge generating layer, and a thickness of the hole transporting zone is in a range from 5 nm to 40 nm and smaller than a thickness of the N layer.

    ORGANIC ELECTROLUMINESCENCE ELEMENT, ELECTRONIC DEVICE, COMPOSITION, AND MIXTURE POWDER
    9.
    发明申请
    ORGANIC ELECTROLUMINESCENCE ELEMENT, ELECTRONIC DEVICE, COMPOSITION, AND MIXTURE POWDER 有权

    公开(公告)号：US20250072273A1

    公开(公告)日：2025-02-27

    申请号：US18722535

    申请日：2022-12-19

    Applicant: IDEMITSU KOSAN CO.,LTD.

    Inventor： Satomi TASAKI ,  Hiroaki TOYOSHIMA ,  Tetsuya MASUDA ,  Masato NAKAMURA ,  Hiroaki ITOI

    IPC: H10K85/20 ,  C09K11/02 ,  C09K11/06 ,  H10K85/40 ,  H10K85/60 ,  H10K101/00 ,  H10K101/10 ,  H10K101/30

    Abstract: An organic EL device includes an emitting region and a first anode side organic layer. The first anode side organic layer contains a first material. The emitting region includes a first emitting layer containing first and second host materials and a second emitting layer containing a third host material. Energy levels of highest occupied molecular orbitals of the first material, the first host material, and the second host material HOMO(HT1), HOMO(H1), and HOMO(H2) satisfy a relationship of a numerical formula (Numerical Formula A1) below, and triplet energies of the first host material, the second host material, and the third host material T1(H1), T1(H2), and T1(H3) satisfy relationships of numerical formulae (Numerical Formula A2 and Numerical Formula A3) below, HOMO ⁡ ( HT ⁢ 1 ) > HOMO ⁡ ( H ⁢ 2 ) > HOMO ⁡ ( H ⁢ 1 ) ( Numerical ⁢ Formula ⁢ A1 ) T 1 ( H ⁢ 1 ) > T 1 ( H ⁢ 3 ) ( Numerical ⁢ Formula ⁢ A2 ) T 1 ( H ⁢ 2 ) > T 1 ( H ⁢ 3 ) . ( Numerical ⁢ Formula ⁢ A3 )

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