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    ORGANIC ELECTROLUMINESCENCE ELEMENT
    3.
    发明申请
    ORGANIC ELECTROLUMINESCENCE ELEMENT 有权

    公开(公告)号：US20220149291A1

    公开(公告)日：2022-05-12

    申请号：US17431195

    申请日：2020-02-28

    Applicant: HODOGAYA CHEMICAL CO., LTD. ,  SFC CO., LTD.

    Inventor： Yuta HIRAYAMA ,  Shunji MOCHIZUKI ,  Takeshi YAMAMOTO ,  Shuichi HAYASHI ,  Young-hwan PARK

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

    Abstract: It is an object of the present invention to provide an organic EL element including a capping layer constituted by two layers consisting of a first capping layer and a second capping layer that has a refractive index that is higher than that of the first capping layer, in order to improve the light extraction efficiency compared with an organic EL element including a capping layer constituted by a single layer. The present invention provides an organic electroluminescent element at least including an anode, a hole transport layer, a light emitting layer, an electron transport layer, a cathode, and a capping layer arranged in this order, wherein the capping layer has a structure constituted by two layers consisting of a first capping layer and a second capping layer, a refractive index of the second capping layer is higher than a refractive index of the first capping layer throughout a wavelength range from 450 to 650 nm, and the second capping layer contains an arylamine compound having a specific structure.

    ORGANIC ELECTROLUMINESCENT DEVICE, AND COMPOUND FOR THE SAME
    4.
    发明申请
    ORGANIC ELECTROLUMINESCENT DEVICE, AND COMPOUND FOR THE SAME 有权

    公开(公告)号：US20250109145A1

    公开(公告)日：2025-04-03

    申请号：US18684337

    申请日：2022-08-18

    Applicant: HODOGAYA CHEMICAL CO., LTD.

    Inventor： Eriko CHIBA ,  Kouki KASE ,  Takeshi YAMAMOTO ,  Yuta HIRAYAMA ,  Shuichi HAYASHI

    IPC: C07D519/00 ,  H10K50/844 ,  H10K85/60

    Abstract: An object of the present invention is to provide a compound not affecting a material inside a device by absorbing light at a wavelength of 400 nm to 410 nm of sunlight, and having a high refractive index at a wavelength in range of 450 nm to 750 nm in order to prevent deterioration inside the device of an organic EL device and greatly improve light extraction efficiency.
    The present invention was achieved by focusing on the fact that arylamine-based materials have excellent thin film stability and durability and planning a diamine compound having a specific benzazole ring structure with a high refractive index, using the compound as materials constituting a capping layer, and an organic EL device having excellent luminous efficiency was obtained.

    COMPOUND AND ORGANIC ELECTROLUMINESCENT ELEMENT
    5.
    发明公开
    COMPOUND AND ORGANIC ELECTROLUMINESCENT ELEMENT 审中-公开

    公开(公告)号：US20240360358A1

    公开(公告)日：2024-10-31

    申请号：US18681888

    申请日：2022-09-20

    Applicant: HODOGAYA CHEMICAL CO., LTD.

    Inventor： Kouki KASE ,  Eriko CHIBA ,  Byung-Sun YANG ,  Moon-Chan HWANG ,  Yuta HIRAYAMA ,  Shuichi HAYASHI

    IPC: C09K11/06 ,  H10K50/11 ,  H10K85/60

    CPC classification number: C09K11/06 ,  H10K50/11 ,  H10K85/6572 ,  C09K2211/1029

    Abstract: It is an object of the present invention to provide a compound that has a high refractive index and a low extinction coefficient in a wavelength range of 450 to 750 nm, which is favorably used as a material for a capping layer of an organic EL element. Also, it is another object of the present invention to provide an organic EL element whose light extraction efficiency has been improved by using the compound. The present invention is directed to a compound represented by a general formula (1) or (2) below:




    where A represents a substituted or unsubstituted aromatic hydrocarbon group or the like, B and C are optionally the same or different, and represent an unsubstituted naphthyl group, an unsubstituted quinolyl group, or the like, and each L is optionally the same or different, and represents a single bond, a substituted or unsubstituted divalent aromatic hydrocarbon group, or the like.

    ORGANIC ELECTROLUMINESCENT ELEMENT
    7.
    发明公开
    ORGANIC ELECTROLUMINESCENT ELEMENT 审中-公开

    公开(公告)号：US20230180598A1

    公开(公告)日：2023-06-08

    申请号：US17925619

    申请日：2021-06-16

    Applicant: HODOGAYA CHEMICAL CO., LTD. ,  SFC CO., LTD.

    Inventor： Yuta HIRAYAMA ,  Takeshi YAMAMOTO ,  Kouki KASE ,  Kazuyuki SURUGA ,  Shuichi HAYASHI ,  Soon-Wook CHA ,  Sung-Hoon JOO ,  Byung-Sun YANG ,  Ji-Hwan KIM

    IPC: H10K85/60 ,  C09K11/06

    CPC classification number: H10K85/633 ,  H10K85/658 ,  C09K11/06 ,  H10K50/156

    Abstract: An objective of the present invention is to provide a material for organic EL devices offering excellent hole injectability and transportability, electron blockability, stability in a thin-film state, and durability, and also to provide an organic EL device having high efficiency, low driving voltage and long lifetime by employing, in combination, the aforementioned material and various materials for organic EL devices offering excellent hole/electron injectability and transportability, electron blockability, stability in a thin-film state, and durability, in a manner that the properties of each of the materials can be brought out effectively. The present invention relates to an organic EL device containing a specific arylamine compound as a material constituting a second hole transport layer, wherein the difference between the HOMO level of the second hole transport layer and the HOMO level of a first hole transport layer is 0.15 eV or less.

    COMPOUND HAVING TRIARYLAMINE STRUCTURE AND ORGANIC ELECTROLUMINESCENCE DEVICE
    9.
    发明申请
    COMPOUND HAVING TRIARYLAMINE STRUCTURE AND ORGANIC ELECTROLUMINESCENCE DEVICE 有权

    公开(公告)号：US20210210693A1

    公开(公告)日：2021-07-08

    申请号：US17057040

    申请日：2019-06-20

    Applicant: HODOGAYA CHEMICAL CO., LTD.

    Inventor： Takuya UEHARA ,  Kouki KASE ,  Kyung-Hwa PARK ,  Yuta HIRAYAMA

    IPC: H01L51/00 ,  C07C211/54 ,  C07C211/61 ,  C07C211/58

    Abstract: An object of the present invention is to provide an organic compound that has excellent properties, with excellent hole injection and transport performance, electron blocking capability, and high stability in a thin film state, and furthermore to provide a highly efficient and highly durable organic EL device by using this compound. The present invention relates to a compound having a triarylamine structure and being represented by the structural formula (A-1) below, where A, B, and C may be the same or different, and each represent a group represented by the structural formula (B-1) below, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group, where at least one of A, B, and C is not the group represented by the structural formula (B-1) below. (For the symbols and the like in the formulae, see the descriptions in the specification.)

    ORGANIC ELECTROLUMINESCENCE DEVICE
    10.
    发明申请
    ORGANIC ELECTROLUMINESCENCE DEVICE 审中-公开

    公开(公告)号：US20200287141A1

    公开(公告)日：2020-09-10

    申请号：US16650717

    申请日：2018-09-21

    Applicant: HODOGAYA CHEMICAL CO., LTD. ,  SFC CO., LTD.

    Inventor： Yuta HIRAYAMA ,  Takeshi YAMAMOTO ,  Kazuyuki SURUGA ,  Se-Jin LEE ,  Oun-Gyu LEE ,  Bong-Ki SHIN

    IPC: H01L51/00 ,  C09K11/06 ,  H01L51/50

    Abstract: [Object] It is an object of the present invention to provide an organic EL device in which various materials for an organic EL device, which is excellent in hole/electron injection/transport performance, electron blocking performance, stability in a thin film state, and durability, are combined as materials for an organic EL device that has high light emission efficiency and high durability so that properties of each of the materials can be effectively expressed, thereby achieving (1) high light emission efficiency and power efficiency, (2) a low light emission start voltage, (3) a low practical driving voltage, and particularly (4) a long lifetime.[Solving Means] There is provided an organic electroluminescence device, including at least an anode, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode in the stated order, the organic electroluminescence device being characterized in that the hole transport layer contains an arylamine compound represented by the following general formula (1), and the light-emitting layer contains a heterocyclic compound having a fused ring structure represented by the following general formula (2) or a heterocyclic compound having a fused ring structure represented by the following general formula (3).

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