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1.发明申请公开(公告)号：US20220173326A1
公开(公告)日：2022-06-02
申请号：US17442601
申请日：2020-03-13
发明人： Masashi TADA , Yuta SAGARA
IPC分类号： H01L51/00
摘要： Provided are an organic EL device having high luminous efficiency and a prolonged lifespan with a low driving voltage, and a melt mixture for an organic electroluminescent device used in the organic EL device. The melt mixture for an organic electroluminescent device is a melt mixture of at least two types of organic compounds including a first organic compound and a second organic compound, and a difference in vapor deposition temperature between the first organic compound and the second organic compound is 20° C. or less, and a difference between a PL maximum emission wavelength of the melt mixture and a PL maximum emission wavelength of any of the first organic compound and the second organic compound is within ±10 nm. The melt mixture is suitable as a host material of a light-emitting layer.
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公开(公告)号：US20200006672A1
公开(公告)日：2020-01-02
申请号：US16490725
申请日：2018-02-20
发明人： Yuta SAGARA , Masashi TADA , Kazuaki YOSHIMURA , Junya OGAWA , Katsuhide NOGUCHI
IPC分类号： H01L51/00
摘要： Provided is a thermally activated delayed fluorescence-emitting organic EL element having a low driving voltage, high luminous efficiency, and a prolonged lifespan. The organic EL element contains one or more light-emitting layers between an anode and a cathode that face each other, and at least one light-emitting layer contains a host material composed of a carbazole compound represented by formula (1) and a thermally activated delayed fluorescence material composed of an indolocarbazole compound containing an indolocarbazole ring in its molecule. Here, L1 represents an aromatic group, and at least one R1 represents a carbazolyl group, and n is 1 or 2.
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公开(公告)号：US20240298539A1
公开(公告)日：2024-09-05
申请号：US18577273
申请日：2022-07-27
发明人： Kentaro HAYASHI , Yuta SAGARA , Junya OGAWA , Yuji IKENAGA , Munetomo INOUE , Satoshi UKIGAI , Sayuri KITERA , Tetsuro YAMASHITA , Masataka OKUYAMA , Mitsuru SAKAI
CPC分类号： H10K85/6572 , C09K11/06 , H10K50/12 , H10K85/654 , C09K2211/1074
摘要： To provide an organic EL device having a low voltage, high efficiency and extended lifetime characteristics, and a host material for use in the organic EL device. A host material for an organic EL device, including a compound represented by the following general formula (1), or a structural isomer thereof: wherein X represents N or C—H and at least one thereof represents N, L independently represents an aromatic hydrocarbon group, and R2 to R6 represent hydrogen, an aliphatic hydrocarbon group, an aromatic hydrocarbon group, an aromatic heterocyclic group, or a linked aromatic group in which two to five of these aromatic rings are linked to each other, provided that R2 and at least one of others do not represent hydrogen.
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4.发明公开公开(公告)号：US20230309400A1
公开(公告)日：2023-09-28
申请号：US18011403
申请日：2021-07-06
申请人： NIPPON STEEL Chemical & Material Co., Ltd. , KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
发明人： Masashi TADA , Yuta SAGARA , Atsushi KAWADA , Takuma YASUDA , In Seob PARK , Jong Uk KIM , So SHIKITA
CPC分类号： H10K85/658 , C07F5/027 , C09K11/06 , H10K50/12
摘要： Provided is a thermally activated delayed fluorescence organic EL device having high emission efficiency and a long lifetime. An organic EL device comprising light emitting layers between an anode and a cathode opposite to each other; wherein at least one of the light emitting layers contains, as a thermally activated delayed fluorescence material, a compound in which a boron-containing electron acceptor backbone is linked with an electron donor backbone having a specific fused ring structure; and the compound is represented by the following general formula (1) where X1 is O or S.
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公开(公告)号：US20210119144A1
公开(公告)日：2021-04-22
申请号：US16970566
申请日：2019-03-04
发明人： Yuta SAGARA , Masashi TADA
摘要： Provided is a thermally activated delayed fluorescent emission-type organic electroluminescent device (organic EL device) having a low driving voltage, high luminous efficiency, and a long lifetime. The organic EL device is a delayed fluorescent emission-type organic EL device including one or more light-emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light-emitting layers contains a para-biphenylcarbazole compound-type host material represented by the general formula (1), and an indolocarbazole compound-type thermally activated delayed fluorescent light-emitting material including an indolocarbazole ring in a molecule thereof.
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公开(公告)号：US20230371375A1
公开(公告)日：2023-11-16
申请号：US18029761
申请日：2021-10-15
申请人： NIPPON STEEL Chemical & Material Co., Ltd. , KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
发明人： Masashi TADA , Atsushi KAWADA , Yuta SAGARA , Sayuri KITERA , Takuma YASUDA , Hyukgi MIN , In Seob PARK
CPC分类号： H10K85/658 , H10K85/6572 , H10K85/654 , C09K11/02 , C09K11/06 , C09K2211/1022
摘要： Provided are an emission material and an organic EL device including the emission material and having high emission efficiency and a long lifetime. An organic EL device comprising light emitting layers between an anode and a cathode opposite to each other; wherein at least one of the light emitting layers contains, as a light emitting dopant, a compound in which a backbone having a specific 5-ring-fused ring structure, and a boron atom are combined, and the compound is represented by the following general formula (1).
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公开(公告)号：US20230139757A1
公开(公告)日：2023-05-04
申请号：US17800786
申请日：2021-03-19
发明人： Masashi TADA , Munetomo INOUE , Ayaka TERADA , Yuta SAGARA
摘要： Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device comprises one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers contains a first host, a second host, and a light emitting dopant; the first host is a carbazole compound or a bicarbazole compound; the second host is an indolocarbazole compound; and the light emitting dopant is a polycyclic aromatic compound represented by the general formula (4) or a polycyclic aromatic compound having this structure as a partial structure. In the formula, Y4 is B, P, P═O, P═S, AL, Ga, As, Si—R4, or Ge—R41, and X4 is O, N—Ar4, S, or Se.
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公开(公告)号：US20230136708A1
公开(公告)日：2023-05-04
申请号：US17801914
申请日：2021-03-19
发明人： Munetomo INOUE , Masashi TADA , Yuta SAGARA , Ayaka TERADA
IPC分类号： H10K85/60
摘要： Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic electroluminescent device includes one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers comprises one or more hosts selected from the indolocarbazole compounds represented by the following general formula (1) and, as a light emitting dopant, a polycyclic aromatic compound represented by the following general formula (2) or a polycyclic aromatic compound having the structure represented by the general formula (2) as a substructure, and wherein in the formulae Z is an indolocarbazole ring-containing group, X1 is O, N—Ar3, S, or Se, and Y1 is B, P, P═O, P═S, Al, Ga, As, Si—R2 or Ge—R3.
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