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1.发明公开公开(公告)号：US20240130228A1
公开(公告)日：2024-04-18
申请号：US18276328
申请日：2022-01-31
CPC分类号： H10K85/6572 , C09K11/06 , H10K85/342 , H10K85/615 , H10K85/633 , H10K85/636 , H10K50/166
摘要： A light-emitting device with high heat resistance in a manufacturing process is to be provided. The light-emitting device includes a second electrode over a first electrode with an EL layer sandwiched therebetween; the EL layer includes at least a light-emitting layer, a first electron-transport layer, and a second electron-transport layer; the first electron-transport layer is over the light-emitting layer; the light-emitting device includes an insulating layer in contact with a side surface of the light-emitting layer and a side surface of the first electron-transport layer; the second electron-transport layer is over the first electron-transport layer; the insulating layer is positioned between the second electron-transport layer and the side surface of the light-emitting layer and the side surface of the first electron-transport layer; and the first electron-transport layer contains a heteroaromatic compound including at least one heteroaromatic ring and an organic compound different from the heteroaromatic compound.
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公开(公告)号：US12063856B2
公开(公告)日：2024-08-13
申请号：US17703524
申请日：2022-03-24
CPC分类号： H10K85/6572 , H10K85/615 , H10K85/626 , H10K85/654 , H10K50/16
摘要： 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.
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公开(公告)号：US20220336755A1
公开(公告)日：2022-10-20
申请号：US17703524
申请日：2022-03-24
IPC分类号： H01L51/00
摘要： 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.
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4.发明公开公开(公告)号：US20240008355A1
公开(公告)日：2024-01-04
申请号：US18214796
申请日：2023-06-27
发明人： Toshiki Sasaki , Hiromitsu Kido , Tsunenori Suzuki , Nobuharu Ohsawa , Hideko Yoshizumi , Satoshi Seo , Satoko Numata , Eriko Aoyama , Yui Yoshiyasu
CPC分类号： H10K85/342 , C07F15/0033 , C09K11/06 , H10K50/11
摘要： A light-emitting device includes a light-emitting layer containing a light-emitting substance and a first organic compound. The light-emitting substance is an organometallic complex containing a central metal and ligands. One of the ligands includes a skeleton formed by a ring A1 and a pyridine ring bonded to each other. The ring A1 represents an aromatic ring or a heteroaromatic ring. The pyridine ring includes an alkyl group having 1 to 6 carbon atoms and being substituted with deuterium. The first organic compound includes an electron-transport skeleton and first and second substituents that are bonded to the electron-transport skeleton. The electron-transport skeleton includes a heteroaromatic ring having two or more nitrogen atoms. The first substituent includes one or both of an aromatic ring and a heteroaromatic ring. The second substituent includes a skeleton having a hole-transport property. The lowest triplet excited state of the first organic compound is locally distributed in the first substituent.
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公开(公告)号：US20220109119A1
公开(公告)日：2022-04-07
申请号：US17485802
申请日：2021-09-27
发明人： Nobuharu Ohsawa , Satoshi Seo , Yui Yoshiyasu , Hideko Yoshizumi
摘要： A novel light-emitting device is provided. The light-emitting device includes a first electrode, a second electrode, and a light-emitting layer between the first electrode and the second electrode. The light-emitting layer includes an organometallic complex emitting phosphorescence at room temperature and a light-emitting material emitting fluorescence. The organometallic complex includes a ligand with at least one first substituent selected from a branched alkyl group having 3 to 12 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 carbon atoms in a ring, and a trialkylsilyl group having 3 to 12 carbon atoms. An absorption spectrum of the light-emitting material has the longest-wavelength edge at a first wavelength λabs (nm), and a phosphorescence spectrum of the organometallic complex has the shortest-wavelength edge at a second wavelength λp (nm). The first wavelength λabs (nm) is longer than the second wavelength λp (nm).
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公开(公告)号：US20230025460A1
公开(公告)日：2023-01-26
申请号：US17851288
申请日：2022-06-28
IPC分类号： H01L51/50 , C07D471/04 , C07D403/10 , C07D409/10 , C07D401/14 , C07D491/048 , C07D403/14 , C07D519/00 , C07F7/22 , C07F15/00 , H01L51/00
摘要： A light-emitting device with high resistance to heat in a fabrication process is provided. The light-emitting device includes an EL layer between an anode and a cathode. The EL layer includes at least a light-emitting layer and an electron-transport layer that includes a first electron-transport layer in contact with the light-emitting layer and a second electron-transport layer in contact with the first electron-transport layer. The first electron-transport layer includes a first heteroaromatic compound including at least one heteroaromatic ring. The second electron-transport layer includes a second heteroaromatic compound that includes at least one heteroaromatic ring and is different from the first heteroaromatic compound. The first heteroaromatic compound has a difference of 20° C. or less between the crystallization temperature (Tpc) of a powder state and the crystallization temperature (Ttc) of a thin film state. The second heteroaromatic compound has a difference of 100° C. or less between Tpc and Ttc.
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7.发明公开公开(公告)号：US20240155863A1
公开(公告)日：2024-05-09
申请号：US18276750
申请日：2022-02-02
CPC分类号： H10K50/166 , C09K11/06 , H10K50/13 , H10K85/633
摘要： A light-emitting device having high heat resistance in a manufacturing process is provided. Provided is a light-emitting device which includes a second electrode over a first electrode with a first EL layer therebetween and in which the first EL layer includes at least a first light-emitting layer; a second EL layer is over the first EL layer; the second EL layer includes at least a second light-emitting layer, a first electron-transport layer, a second electron-transport layer, and an electron-injection layer; the first electron-transport layer is over the second light-emitting layer; the second electron-transport layer is over the first electron-transport layer; an insulating layer is in contact with the side surface of the first light-emitting layer, the side surface of the second light-emitting layer, the side surface of the first electron-transport layer, and the side surface of the second electron-transport layer; the electron-injection layer is over the second electron-transport layer; the insulating layer is positioned between the electron-injection layer and the side surface of the first light-emitting layer, the side surface of the second light-emitting layer, the side surface of the first electron-transport layer, and the side surface of the second electron-transport layer; and the second electron-transport layer includes a heteroaromatic compound including at least one heteroaromatic ring and an organic compound different from the heteroaromatic compound.
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8.发明申请公开(公告)号：US20230103249A1
公开(公告)日：2023-03-30
申请号：US17866013
申请日：2022-07-15
发明人： Sachiko Kawakami , Yui Yoshiyasu , Nobuharu Ohsawa , Tsunenori Suzuki , Toshiki Sasaki , Naoaki Hashimoto , Tomohiro Kubota , Satoshi Seo
IPC分类号： H01L51/00
摘要： A light-emitting device with high resistance to heat in a fabrication process is provided. The light-emitting device includes an EL layer between an anode and a cathode, and the EL layer includes at least a light-emitting layer. The light-emitting device includes, between the light-emitting layer and the cathode, a first layer in contact with the light-emitting layer. The light-emitting layer includes a light-emitting substance, a first organic compound, and a second organic compound. The first layer includes a third organic compound different from the first organic compound and the second organic compound. The light-emitting substance emits green to yellow light. The third organic compound includes a bicarbazole skeleton and a heteroaromatic ring skeleton including one selected from a pyridine ring, a diazine ring, and a triazine ring.
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公开(公告)号：US20210336156A1
公开(公告)日：2021-10-28
申请号：US17263674
申请日：2019-07-29
发明人： Yui Yoshiyasu , Hideko YOSHIZUMI , Takeyoshi WATABE , Satoshi SEO
摘要： A novel organometallic complex is provided. One embodiment of the present invention provides a novel organometallic complex having a high quantum yield. An Ir complex has a structure including a 1H-naphtho[1,2-d]imidazole skeleton as a ligand and being represented by General Formula (G-1) below. Of Ns included in the 1H-naphtho[1,2-d]imidazole skeleton, N that is not bonded to Ir is bonded to a substituted or unsubstituted aryl group. In General Formula (G-1), each of R1 to R10 independently represents any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 7 carbon atoms, a substituted or unsubstituted aryl group having 6 to 25 carbon atoms, and an electron-withdrawing group, and Ar represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms.
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