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公开(公告)号：US20240334735A1
公开(公告)日：2024-10-03
申请号：US18617866
申请日：2024-03-27
发明人： Hiromi Seo , Takeyoshi Watabe , Nobuharu Ohsawa , Shinya Fukuzaki
CPC分类号： H10K50/19 , H10K50/11 , H10K50/16 , H10K85/342 , H10K85/633 , H10K85/6572
摘要： A tandem light-emitting device that can be suitably used for a high-resolution display device is provided. The light-emitting device includes a first electrode, a second electrode facing the first electrode, a first light-emitting layer, a second light-emitting layer, and a first layer. The first light-emitting layer and the second light-emitting layer are between the first electrode and the second electrode. The first layer is between the first light-emitting layer and the second light-emitting layer. GSP_slope (mV/nm) of the first layer and GSP_slope (mV/nm) of the first light-emitting layer are denoted by signs of opposite polarities. Note that the GSP_slope (mV/nm) is a parameter represented by V/d when a surface potential and a thickness of a film are represented by V (mV) and d (nm), respectively.
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公开(公告)号：US12058878B2
公开(公告)日：2024-08-06
申请号：US17414058
申请日：2019-12-12
IPC分类号： H10K50/13 , H10K50/16 , H10K50/852 , H10K65/00 , H10K102/00
CPC分类号： H10K50/131 , H10K50/852 , H10K65/00 , H10K50/16 , H10K2102/311
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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公开(公告)号：US11462701B2
公开(公告)日：2022-10-04
申请号：US16173541
申请日：2018-10-29
发明人： Yusuke Nonaka , Satoshi Seo , Harue Osaka , Tsunenori Suzuki , Takeyoshi Watabe
摘要： To increase emission efficiency of a fluorescent light-emitting element by efficiently utilizing a triplet exciton generated in a light-emitting layer. The light-emitting layer of the light-emitting element includes at least a host material and a guest material. The triplet exciton generated from the host material in the light-emitting layer is changed to a singlet exciton by triplet-triplet annihilation (TTA). The guest material (fluorescent dopant) is made to emit light by energy transfer from the singlet exciton. Thus, the emission efficiency of the light-emitting element is improved.
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公开(公告)号：US11133482B2
公开(公告)日：2021-09-28
申请号：US16269114
申请日：2019-02-06
发明人： Satoshi Seo , Nobuharu Ohsawa , Takeyoshi Watabe
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：US20210257562A1
公开(公告)日：2021-08-19
申请号：US17173713
申请日：2021-02-11
发明人： Takeyoshi Watabe , Satoshi Seo
摘要： An electronic device with high outcoupling efficiency or a high light-trapping effect is provided.
The electronic device includes a first layer and a second layer between a first electrode and a second electrode, the first layer is included between the first electrode and the second layer, the first layer includes a first organic compound and a first substance, the refractive index of a thin film of the first organic compound is higher than or equal to 1 and lower than or equal to 1.75, the first substance has an electron-accepting property, and the second layer has a function of emitting or absorbing light.-
公开(公告)号：US10964903B2
公开(公告)日：2021-03-30
申请号：US16173541
申请日：2018-10-29
发明人： Yusuke Nonaka , Satoshi Seo , Harue Osaka , Tsunenori Suzuki , Takeyoshi Watabe
摘要： To increase emission efficiency of a fluorescent light-emitting element by efficiently utilizing a triplet exciton generated in a light-emitting layer. The light-emitting layer of the light-emitting element includes at least a host material and a guest material. The triplet exciton generated from the host material in the light-emitting layer is changed to a singlet exciton by triplet-triplet annihilation (TTA). The guest material (fluorescent dopant) is made to emit light by energy transfer from the singlet exciton. Thus, the emission efficiency of the light-emitting element is improved.
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公开(公告)号：US10910568B2
公开(公告)日：2021-02-02
申请号：US16859056
申请日：2020-04-27
发明人： Takeyoshi Watabe , Satoko Shitagaki , Kunihiko Suzuki , Harue Osaka , Satomi Mitsumori , Satoshi Seo
摘要： A light-emitting element with high emission efficiency and high reliability is provided. The light-emitting element includes a light-emitting layer containing a first organic compound, a second organic compound, and a guest material. The first organic compound has a nitrogen-containing six-membered heteroaromatic skeleton. In the light-emitting layer, the weight ratio of an organic compound having a nitrogen-containing five-membered heterocyclic skeleton with an NH group, a secondary amine skeleton with an NH group, or a primary amine skeleton with an NH group to the first organic compound is less than or equal to 0.03, or alternatively, the weight ratio of the organic compound having a nitrogen-containing five-membered heterocyclic skeleton with an NH group, a secondary amine skeleton with an NH group, or a primary amine skeleton with an NH group to the second organic compound is less than or equal to 0.01.
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公开(公告)号：US20200259105A1
公开(公告)日：2020-08-13
申请号：US16859056
申请日：2020-04-27
发明人： Takeyoshi Watabe , Satoko SHITAGAKI , Kunihiko SUZUKI , Harue OSAKA , Satomi MITSUMORI , Satoshi SEO
摘要： A light-emitting element with high emission efficiency and high reliability is provided. The light-emitting element includes a light-emitting layer containing a first organic compound, a second organic compound, and a guest material. The first organic compound has a nitrogen-containing six-membered heteroaromatic skeleton. In the light-emitting layer, the weight ratio of an organic compound having a nitrogen-containing five-membered heterocyclic skeleton with an NH group, a secondary amine skeleton with an NH group, or a primary amine skeleton with an NH group to the first organic compound is less than or equal to 0.03, or alternatively, the weight ratio of the organic compound having a nitrogen-containing five-membered heterocyclic skeleton with an NH group, a secondary amine skeleton with an NH group, or a primary amine skeleton with an NH group to the second organic compound is less than or equal to 0.01.
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公开(公告)号：US10230055B2
公开(公告)日：2019-03-12
申请号：US15256000
申请日：2016-09-02
发明人： Miki Kanamoto , Takeyoshi Watabe , Hideko Inoue , Satoshi Seo , Satomi Mitsumori , Tatsuyoshi Takahashi
摘要： Provided is a novel compound or a light-emitting element with high emission efficiency. The provided novel compound includes a bicarbazole skeleton and a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The provided light-emitting element includes the compound.
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10.发明授权公开(公告)号：US10153437B2
公开(公告)日：2018-12-11
申请号：US15152232
申请日：2016-05-11
发明人： Tomoya Hirose , Harue Osaka , Takeyoshi Watabe , Satomi Mitsumori , Yuko Kubota , Satoshi Seo
摘要： Provided is a novel substance that can be used in an element capable of emitting phosphorescence, a novel substance that contributes to high emission efficiency, or a novel substance that contributes to light emission with high color purity. A light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a substance including a carbazole skeleton. The substance is bonded to a substituted or unsubstituted first arylene group through a nitrogen atom included in the carbazole skeleton. The first arylene group is bonded to a substituted or unsubstituted benzofuropyridyl group or a substituted or unsubstituted benzothienopyridyl group. The first arylene group includes 1 to 5 substituted or unsubstituted second arylene groups which are bonded to one another. The EL layer may further include a layer including an emission center substance, specifically an iridium compound.
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