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公开(公告)号:US10749112B2
公开(公告)日:2020-08-18
申请号:US16385472
申请日:2019-04-16
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Satoshi Seo , Tatsuyoshi Takahashi , Kyoko Takeda , Kanta Abe , Hiroki Suzuki
IPC: H01L51/00 , H01L27/32 , C07F15/00 , C09K11/06 , G06F3/041 , G06F3/045 , H01L51/50 , H05B33/14 , H05B33/20
Abstract: A light-emitting element with a lower voltage and higher emission efficiency is provided. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound, and a difference between them is larger than 0 eV and smaller than or equal to 0.5 eV. Furthermore, the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.
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公开(公告)号:US20200258948A1
公开(公告)日:2020-08-13
申请号:US16797167
申请日:2020-02-21
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Satoshi Seo , Toshiki Sasaki , Ryohei Yamaoka
Abstract: Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.170 and a chromaticity y of greater than or equal to 0.020 and less than 0.060.
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公开(公告)号:US10686207B2
公开(公告)日:2020-06-16
申请号:US15195187
申请日:2016-06-28
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Shunpei Yamazaki , Teppei Oguni , Satoshi Seo , Hiroshi Kadoma
IPC: H01M10/0525 , H01M10/02 , H01M10/052 , H01M2/18 , H01M2/16 , H01M2/02
Abstract: To provide a storage battery including a carbon-based material. To provide a graphene compound film having desired ion conductivity and mechanical strength while preventing direct contact between electrodes in a storage battery. To achieve long-term reliability. A lithium-ion storage battery includes a positive electrode, a negative electrode, an exterior body, and a separator between the positive electrode and the negative electrode. In the lithium-ion storage battery, one of the positive electrode and the negative electrode is wrapped in a first film, and the positive electrode, the negative electrode, and the separator are stored in the exterior body. The first film may include a first region in which the first film includes a first functional group. The first film may further include a second region in which the first film includes a second functional group different from the first functional group. The first film may be a graphene compound film.
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公开(公告)号:US10686153B2
公开(公告)日:2020-06-16
申请号:US15911225
申请日:2018-03-05
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Takahiro Ishisone , Satoshi Seo , Yusuke Nonaka , Nobuharu Ohsawa
Abstract: Provided is a light-emitting element which includes a first electrode, a second electrode over the first electrode, and first and second light-emitting layers therebetween. The first light-emitting layer contains a first host material and a first light-emitting material, and the second light-emitting layer contains a second host material and a second light-emitting material. The first light-emitting material is a fluorescent material, and the second light-emitting material is a phosphorescent material. The level of the lowest triplet excited state (T1 level) of the first light-emitting material is higher than the T1 level of the first host material. A light-emitting device, an electronic device, and a lighting device including the light-emitting element are further provided.
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公开(公告)号:US10686152B2
公开(公告)日:2020-06-16
申请号:US16217231
申请日:2018-12-12
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Satoshi Seo , Takahiro Ishisone , Nobuharu Ohsawa , Yusuke Nonaka , Toshiki Sasaki
IPC: H01L51/50 , G09G3/3225 , H01L27/32 , H01L51/52
Abstract: Emission efficiency of a light-emitting element is improved. The light-emitting element has a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer includes a fluorescent material and a host material. The second light-emitting layer includes a phosphorescent material, a first organic compound, and a second organic compound. An emission spectrum of the second light-emitting layer has a peak in a yellow wavelength region. The first organic compound and the second organic compound form an exciplex.
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公开(公告)号:US10680017B2
公开(公告)日:2020-06-09
申请号:US14932343
申请日:2015-11-04
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Shogo Uesaka , Toshiki Sasaki , Nobuharu Ohsawa , Satoshi Seo
Abstract: A light-emitting element including a first electrode, a second electrode, and an EL layer provided between the first and second electrodes is provided. The first electrode includes a conductive layer, a first transparent conductive layer in contact with the conductive layer, and a second transparent conductive layer in contact with the first transparent conductive layer. The first transparent conductive layer contains a first oxide. The second transparent conductive layer contains a second oxide. The conductive layer has a function of reflecting light. The first oxide contains In and M (M represents Al, Si, Ti, Ga, Y, Zr, La, Ce, Nd, or Hf). The second oxide contains In. The resistivity of the second transparent conductive layer is lower than that of the first transparent conductive layer. The thickness of the second transparent conductive layer is greater than or equal to that of the first transparent conductive layer.
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公开(公告)号:US10600853B2
公开(公告)日:2020-03-24
申请号:US16211287
申请日:2018-12-06
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Kaoru Hatano , Satoshi Seo , Shunpei Yamazaki
Abstract: The invention relates to: a light-emitting device which includes a first flexible substrate having a first electrode, a light-emitting layer over the first electrode, and a second electrode with a projecting portion over the light-emitting layer and a second flexible substrate having a semiconductor circuit and a third electrode electrically connected to the semiconductor circuit, in which the projecting portion of the second electrode and the third electrode are electrically connected to each other; a method for manufacturing the light-emitting device; and a cellular phone which includes a housing incorporating the light-emitting device and having a longitudinal direction and a lateral direction, in which the light-emitting device is disposed on a front side and in an upper portion in the longitudinal direction of the housing.
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公开(公告)号:US10573837B2
公开(公告)日:2020-02-25
申请号:US15985748
申请日:2018-05-22
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Naoaki Hashimoto , Tsunenori Suzuki , Satoshi Seo , Hiromi Seo , Hiromitsu Kido
Abstract: A light-emitting element that includes a fluorescent material and has a high emission efficiency is provided. A light-emitting element in which a delayed fluorescence component due to TTA accounts for a high proportion of emissive components is provided. A novel light-emitting device with a high emission efficiency and a low power consumption is provided. A light-emitting element includes an anode, a cathode, and an EL layer. The EL layer includes a light-emitting layer including a host material and an electron-transport layer including a first material in contact with the light-emitting layer. The LUMO level of the first material is lower than that of the host material. The proportion of a delayed fluorescence component due to TTA is greater than or equal to 10 percent of the light emission from the EL layer. The proportion of the delayed fluorescence component due to TTA may be greater than or equal to 15 percent of the light emission.
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公开(公告)号:US20200052042A1
公开(公告)日:2020-02-13
申请号:US16659982
申请日:2019-10-22
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Satoshi Seo , Toshiki Sasaki , Nobuharu Ohsawa , Takahiro Ushikubo , Shunpei Yamazaki
Abstract: A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is.
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60.
公开(公告)号:US20200020870A1
公开(公告)日:2020-01-16
申请号:US16516987
申请日:2019-07-19
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor: Satoshi Seo , Hiromi Seo , Tatsuyoshi Takahashi , Takahiro Ishisone
Abstract: A multicolor light-emitting element using fluorescence and phosphorescence, which has a small number of manufacturing steps owing to a relatively small number of layers to be formed and is advantageous for practical application can be provided. In addition, a multicolor light-emitting element using fluorescence and phosphorescence, which has favorable emission efficiency is provided. A light-emitting element which includes a light-emitting layer having a stacked-layer structure of a first light-emitting layer exhibiting light emission from a first exciplex and a second light-emitting layer exhibiting phosphorescence is provided.
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