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公开(公告)号：US20230095777A1
公开(公告)日：2023-03-30
申请号：US17980869
申请日：2022-11-04
发明人： Satoshi SEO , Nobuharu OHSAWA , Takeyoshi WATABE
IPC分类号： H01L51/50
摘要： Provided is a light-emitting element including a fluorescence-emitting material with high emission efficiency. The light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first organic compound, a second organic compound, and a guest material. The first organic compound has a function of emitting a thermally activated delayed fluorescence at room temperature. The guest material has a function of emitting fluorescence. A HOMO level of the first organic compound higher than or equal to a HOMO level of the second organic compound. A LUMO level of the first organic compound is lower than or equal to a LUMO level of the second organic compound.
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公开(公告)号：US20230037397A1
公开(公告)日：2023-02-09
申请号：US17780247
申请日：2020-11-18
发明人： Takeyoshi WATABE , Airi UEDA , Nobuharu OHSAWA , Satoshi SEO
IPC分类号： H01L51/52
摘要： A near-infrared organic EL device with favorable efficiency is provided. A light-emitting device including a first electrode, a second electrode, and an EL layer is provided; in which the EL layer is positioned between the first electrode and the second electrode; in which the EL layer emits light having a peak of an emission spectrum in a wavelength range of greater than or equal to 750 nm and less than or equal to 1000 nm; in which one of the first electrode and the second electrode is an electrode having a transmitting property with respect to light with a peak wavelength of the emission spectrum of the EL layer; in which a first layer is provided in contact with a surface of the electrode having a transmitting property, which is opposite to a surface facing the EL layer; in which the first layer contains an organic compound; and in which the first layer has the local maximum value of an extinction coefficient k in the visible light region.
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公开(公告)号：US20230029353A1
公开(公告)日：2023-01-26
申请号：US17739260
申请日：2022-05-09
发明人： Takeyoshi WATABE , Hiromi SEO , Airi UEDA , Yuta KAWANO , Tomohiro KUBOTA , Yasushi KITANO , Takao TOSU , Nobuharu OHSAWA , Satoshi SEO
IPC分类号： H01L51/50 , C07C211/45 , H01L51/42
摘要： An organic semiconductor device with low driving voltage is provided. The light-emitting device includes an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes a hole-transport layer and alight-emitting layer. The hole-transport layer is positioned between the anode and the light-emitting layer. The hole-transport layer is not in contact with the anode. The hole-transport layer includes a transport layer material for a light-emitting device and the GSP_slope that is a potential gradient of a surface potential of an evaporated film of the material is higher than or equal to 20 (mV/nm).
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公开(公告)号：US20220278292A1
公开(公告)日：2022-09-01
申请号：US17672799
申请日：2022-02-16
发明人： Takeyoshi WATABE , Airi UEDA , Yuta KAWANO , Nobuharu OHSAWA , Satoshi SEO
摘要： A light-emitting device with high emission efficiency is provided. The light-emitting device includes a first electrode, a second electrode, and an EL layer positioned between the first electrode and the second electrode. The EL layer includes at least a light-emitting layer, a first layer, a second layer, and a third layer. The first layer is positioned between the first electrode and the light-emitting layer. The third layer is positioned between the first layer and the light-emitting layer. The second layer is positioned between the first layer and the third layer. The first layer includes a first organic compound. The second layer includes a second organic compound. The third layer includes a third organic compound. The ordinary refractive index of the second organic compound is higher than the ordinary refractive indices of the first organic compound and the third organic compound.
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公开(公告)号：US20220267668A1
公开(公告)日：2022-08-25
申请号：US17608213
申请日：2020-04-28
发明人： Takahiro ISHISONE , Nobuharu OHSAWA , Satoshi SEO
摘要： A light-emitting device with high emission efficiency and reliability is provided. The light-emitting device includes first and second light-emitting units. The first light-emitting unit includes a first light-emitting layer; the first light-emitting layer includes a first material and a second material; the first material has a function of converting triplet excitation energy into light emission; the second material has a function of converting singlet excitation energy into light emission and includes a luminophore and five or more protecting groups; the luminophore is a condensed aromatic ring or a condensed heteroaromatic ring; the five or more protecting groups each independently have any one of an alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 carbon atoms, and a trialkylsilyl group having 3 to 12 carbon atoms; and light emission is obtained from the second material.
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公开(公告)号：US20220223812A1
公开(公告)日：2022-07-14
申请号：US17612299
申请日：2020-05-18
发明人： Takeyoshi Watabe , Airi UEDA , Nobuharu OHSAWA , Satoshi SEO
IPC分类号： H01L51/50
摘要： A light-emitting device that emits near-infrared light and emits visible light that is less likely to be seen is provided. The light-emitting device contains a light-emitting organic compound and a host material in a light-emitting layer. The maximum peak wavelength in an emission spectrum of the light-emitting device is greater than or equal to 750 nm and less than or equal to 900 nm. A luminance A and a radiance B of the light-emitting device satisfy 0≤A/B≤1.
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公开(公告)号：US20220216445A1
公开(公告)日：2022-07-07
申请号：US17552638
申请日：2021-12-16
发明人： Hiromi SEO , Takeyoshi WATABE , Airi UEDA , Yuta KAWANO , Nobuharu OHSAWA , Hiromitsu KIDO , Satoshi SEO
摘要： An organic semiconductor device with low driving voltage is provided. The organic semiconductor device includes a layer containing an organic compound between a pair of electrodes. The layer containing an organic compound includes a hole-transport region. The hole-transport region includes a first layer and a second layer. The first layer is positioned between the anode and the second layer. When a potential gradient of a surface potential of an evaporated film is set as GSP (mV/nm), a value obtained by subtracting GSP of an organic compound in the second layer from GSP of an organic compound in the first layer is less than or equal to 20 (mV/nm).
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公开(公告)号：US20220069258A1
公开(公告)日：2022-03-03
申请号：US17435452
申请日：2020-02-24
发明人： Takeyoshi Watabe , Airi UEDA , Nobuharu OHSAWA , Satoshi SEO
摘要： A light-emitting device is provided. The light-emitting device includes an intermediate layer, a first light-emitting unit, and a second light-emitting unit. The intermediate layer includes a region interposed between the first light-emitting unit and the second light-emitting unit. The intermediate layer has a function of supplying an electron to one of the first light-emitting unit and the second light-emitting unit and supplying a hole to the other. The first light-emitting unit includes a first light-emitting layer, the first light-emitting layer includes a first light-emitting material, the second light-emitting unit includes a second light-emitting layer, the second light-emitting layer includes a second light-emitting material, the second light-emitting layer has a first distance from the first light-emitting layer, and the first distance is longer than or equal to 5 nm and shorter than or equal to 65 nm.
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公开(公告)号：US20220029121A1
公开(公告)日：2022-01-27
申请号：US17414058
申请日：2019-12-12
摘要： A display apparatus having a function of emitting visible light and infrared light and a light detection function is provided. The display apparatus includes a first light-emitting device, a second light-emitting device, and a light-receiving device in a display portion. The first light-emitting device emits both visible light and infrared light and the second light-emitting device emits visible light. The light-receiving device has a function of absorbing at least part of visible light and infrared light. The first light-emitting device includes a first pixel electrode, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a third light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The first light-emitting layer includes a light-emitting material emitting infrared light. The second light-emitting layer and the third light-emitting layer include light-emitting materials emitting visible light with different wavelengths. The active layer includes an organic compound.
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10.发明申请公开(公告)号：US20210336176A1
公开(公告)日：2021-10-28
申请号：US17237262
申请日：2021-04-22
发明人： Yuta KAWANO , Airi UEDA , Takeyoshi WATABE , Nobuharu OHSAWA , Keito TOSU , Harue OSAKA , Satoshi SEO , Ryo NARUKAWA , Shiho NOMURA
摘要： A light-emitting device with high emission efficiency is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the anode and the cathode. The EL layer includes a light-emitting layer and an electron-transport layer; the light-emitting layer includes a light-emitting material; the electron-transport layer includes an organic compound having an electron-transport property and a metal complex of an alkali metal; the ordinary refractive index of the organic compound having an electron-transport property in a peak wavelength of light emitted from the light-emitting material is greater than or equal to 1.50 and less than or equal to 1.75; and the ordinary refractive index of the metal complex of an alkali metal in the peak wavelength of the light emitted from the light-emitting material is greater than or equal to 1.45 and less than or equal to 1.70.
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