Patents by Inventor Shogo UESAKA
Shogo UESAKA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9780338Abstract: A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen).Type: GrantFiled: November 30, 2016Date of Patent: October 3, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tsunenori Suzuki, Shogo Uesaka, Ryohei Yamaoka, Satoshi Seo
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Publication number: 20170263878Abstract: A light-emitting element with high reliability that can keep favorable characteristics after long-time driving is provided. In addition, a light-emitting device having a long lifetime including the light-emitting element is provided. Moreover, an electronic device and a lighting device having a long lifetime are provided. In a light-emitting element including an EL layer between a pair of electrodes, a light-emitting layer included in the EL layer has a stacked-layer structure which is different from the conventional structure, whereby the light-emitting element can keep favorable characteristics after long-time driving even in the case where carrier balance is changed over time due to driving of the light-emitting element or a light-emitting region is shifted due to the change.Type: ApplicationFiled: May 23, 2017Publication date: September 14, 2017Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Shogo Uesaka, Ryohei Yamaoka
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Publication number: 20170256742Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex.Type: ApplicationFiled: March 2, 2017Publication date: September 7, 2017Inventors: Hiromi SEO, Satoko SHITAGAKI, Satoshi SEO, Takahiro USHIKUBO, Toshiki SASAKI, Shogo UESAKA
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Publication number: 20170256743Abstract: To provide a novel light-emitting element or a novel light-emitting device with high emission efficiency and low power consumption, a light-emitting element having a plurality of light-emitting layers between a pair of electrodes includes a lower electrode, a first light-emitting layer over the lower electrode, a charge-generation layer over the first light-emitting layer, a second light-emitting layer over the charge-generation layer, and an upper electrode over the second light-emitting layer. An emission spectrum of the first light-emitting layer peaks at a longer wavelength than an emission spectrum of the second light-emitting layer. A distance of between a bottom surface of the upper electrode and a bottom surface of the first light-emitting layer is less than or equal to 130 nm.Type: ApplicationFiled: May 16, 2017Publication date: September 7, 2017Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shogo Uesaka, Toshiki Sasaki, Riho Kataishi, Satoshi Seo
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Patent number: 9755174Abstract: A light-emitting element with high emission efficiency which includes a plurality of light-emitting layers and exhibits multi-color light emission is provided. The light-emitting element includes a first electrode, a second electrode, and an EL layer between the first electrode and the second electrode. The EL layer includes a first injection layer, a first light-emitting layer, and a second light-emitting layer in a first region, and a second injection layer, the first light-emitting layer, and the second light-emitting layer in a second region. The first light-emitting layer includes a first light-emitting material and a first host material, and the second light-emitting layer includes a second light-emitting material and a second host material. A color of light emitted from the first region is different from that of light emitted from the second region.Type: GrantFiled: February 23, 2016Date of Patent: September 5, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shogo Uesaka, Nobuharu Ohsawa
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Publication number: 20170213991Abstract: A light-emitting device in which different electrodes in a work function are used in a first light-emitting element and a second light-emitting element are provided. A light-emitting device includes a first light-emitting element and a second light-emitting element. The first light-emitting element includes a first electrode, an EL layer, and a second electrode in this order. The second light-emitting element includes a third electrode, the EL layer, and the second electrode in this order. The EL layer includes a first light-emitting layer, a layer, and a second light-emitting layer in this order. The structure of the first light-emitting layer is different from the structure of the second light-emitting layer. The first light-emitting element and the second light-emitting element are different in a carrier-injection property.Type: ApplicationFiled: April 10, 2017Publication date: July 27, 2017Inventors: Shogo UESAKA, Nobuharu OHSAWA
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Patent number: 9698365Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting layer is provided between a pair of electrodes. The light-emitting layer is a stack of a first light-emitting layer, which contains at least a first phosphorescent compound, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property and is provided on the anode side, and a second light-emitting layer, which contains at least a second phosphorescent compound and the first organic compound having an electron-transport property. A combination of the first organic compound and the second organic compound forms an exciplex.Type: GrantFiled: July 7, 2016Date of Patent: July 4, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiromi Seo, Satoko Shitagaki, Satoshi Seo, Takahiro Ushikubo, Toshiki Sasaki, Shogo Uesaka
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Publication number: 20170155092Abstract: To provide a novel light-emitting device with high productivity, the light-emitting device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element. In the first light-emitting element, a first lower electrode, a first transparent conductive layer, a first light-emitting layer, a second light-emitting layer, and an upper electrode are stacked in this order. In the second light-emitting element, a second lower electrode, a second transparent conductive layer, the first light-emitting layer, the second light-emitting layer, and the upper electrode are stacked in this order. In the third light-emitting element, a third lower electrode, a third transparent conductive layer, the second light-emitting layer, and the upper electrode are stacked in this order. The first transparent conductive layer includes a first region. The second transparent conductive layer includes a second region as thick as the third transparent conductive layer.Type: ApplicationFiled: February 13, 2017Publication date: June 1, 2017Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi SEO, Ryohei YAMAOKA, Shogo UESAKA
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Patent number: 9666825Abstract: A light-emitting element with high reliability that can keep favorable characteristics after long-time driving is provided. In addition, a light-emitting device having a long lifetime including the light-emitting element is provided. Moreover, an electronic device and a lighting device having a long lifetime are provided. In a light-emitting element including an EL layer between a pair of electrodes, a light-emitting layer included in the EL layer has a stacked-layer structure which is different from the conventional structure, whereby the light-emitting element can keep favorable characteristics after long-time driving even in the case where carrier balance is changed over time due to driving of the light-emitting element or a light-emitting region is shifted due to the change.Type: GrantFiled: June 20, 2016Date of Patent: May 30, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Shogo Uesaka, Ryohei Yamaoka
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Patent number: 9660220Abstract: To provide a novel light-emitting element or a novel light-emitting device with high emission efficiency and low power consumption, a light-emitting element having a plurality of light-emitting layers between a pair of electrodes includes a lower electrode, a first light-emitting layer over the lower electrode, a charge-generation layer over the first light-emitting layer, a second light-emitting layer over the charge-generation layer, and an upper electrode over the second light-emitting layer. An emission spectrum of the first light-emitting layer peaks at a longer wavelength than an emission spectrum of the second light-emitting layer. A distance of between a bottom surface of the upper electrode and a bottom surface of the first light-emitting layer is less than or equal to 130 nm.Type: GrantFiled: October 22, 2015Date of Patent: May 23, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shogo Uesaka, Toshiki Sasaki, Riho Kataishi, Satoshi Seo
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Patent number: 9653517Abstract: A light-emitting device in which different electrodes in a work function are used in a first light-emitting element and a second light-emitting element are provided. A light-emitting device includes a first light-emitting element and a second light-emitting element. The first light-emitting element includes a first electrode, an EL layer, and a second electrode in this order. The second light-emitting element includes a third electrode, the EL layer, and the second electrode in this order. The EL layer includes a first light-emitting layer, a layer, and a second light-emitting layer in this order. The structure of the first light-emitting layer is different from the structure of the second light-emitting layer. The first light-emitting element and the second light-emitting element are different in a carrier-injection property.Type: GrantFiled: August 7, 2015Date of Patent: May 16, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shogo Uesaka, Nobuharu Ohsawa
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Patent number: 9653705Abstract: An electrode layer having high reflectance and a light-emitting element having high emission efficiency are provided. The light-emitting element includes a first electrode layer, a second electrode layer, and an EL layer between the first electrode layer and the second electrode layer. The first electrode layer includes a conductive layer and an oxide layer in contact with the conductive layer. The conductive layer has a function of reflecting light. The oxide layer includes In and M (M represents Al, Si, Ti, Ga, Y, Zr, Sn, La, Ce, Nd, or Hf). A content of the M in the oxide layer is higher than or equal to a content of the In.Type: GrantFiled: October 20, 2015Date of Patent: May 16, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shogo Uesaka, Toshiki Sasaki, Nobuharu Ohsawa
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Publication number: 20170084876Abstract: A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen).Type: ApplicationFiled: November 30, 2016Publication date: March 23, 2017Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tsunenori Suzuki, Shogo Uesaka, Ryohei Yamaoka, Satoshi Seo
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Patent number: 9590208Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex.Type: GrantFiled: February 11, 2016Date of Patent: March 7, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiromi Seo, Satoko Shitagaki, Satoshi Seo, Takahiro Ushikubo, Toshiki Sasaki, Shogo Uesaka
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Patent number: 9577222Abstract: To provide a novel light-emitting device with high productivity, the light-emitting device includes a first light-emitting element, a second light-emitting element, and a third light-emitting element. In the first light-emitting element, a first lower electrode, a first transparent conductive layer, a first light-emitting layer, a second light-emitting layer, and an upper electrode are stacked in this order. In the second light-emitting element, a second lower electrode, a second transparent conductive layer, the first light-emitting layer, the second light-emitting layer, and the upper electrode are stacked in this order. In the third light-emitting element, a third lower electrode, a third transparent conductive layer, the second light-emitting layer, and the upper electrode are stacked in this order. The first transparent conductive layer includes a first region. The second transparent conductive layer includes a second region as thick as the third transparent conductive layer.Type: GrantFiled: September 29, 2015Date of Patent: February 21, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Ryohei Yamaoka, Shogo Uesaka
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Patent number: 9515278Abstract: A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen).Type: GrantFiled: August 6, 2014Date of Patent: December 6, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tsunenori Suzuki, Shogo Uesaka, Ryohei Yamaoka, Satoshi Seo
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Publication number: 20160315275Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting layer is provided between a pair of electrodes. The light-emitting layer is a stack of a first light-emitting layer, which contains at least a first phosphorescent compound, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property and is provided on the anode side, and a second light-emitting layer, which contains at least a second phosphorescent compound and the first organic compound having an electron-transport property. A combination of the first organic compound and the second organic compound forms an exciplex.Type: ApplicationFiled: July 7, 2016Publication date: October 27, 2016Inventors: Hiromi SEO, Satoko SHITAGAKI, Satoshi SEO, Takahiro USHIKUBO, Toshiki SASAKI, Shogo UESAKA
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Publication number: 20160293877Abstract: A light-emitting element with high reliability that can keep favorable characteristics after long-time driving is provided. In addition, a light-emitting device having a long lifetime including the light-emitting element is provided. Moreover, an electronic device and a lighting device having a long lifetime are provided. In a light-emitting element including an EL layer between a pair of electrodes, a light-emitting layer included in the EL layer has a stacked-layer structure which is different from the conventional structure, whereby the light-emitting element can keep favorable characteristics after long-time driving even in the case where carrier balance is changed over time due to driving of the light-emitting element or a light-emitting region is shifted due to the change.Type: ApplicationFiled: June 20, 2016Publication date: October 6, 2016Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Shogo UESAKA, Ryohei YAMAOKA
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Patent number: 9461273Abstract: A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex.Type: GrantFiled: February 11, 2016Date of Patent: October 4, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Hiromi Seo, Satoko Shitagaki, Satoshi Seo, Takahiro Ushikubo, Toshiki Sasaki, Shogo Uesaka
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Publication number: 20160248033Abstract: A light-emitting element with high emission efficiency which includes a plurality of light-emitting layers and exhibits multi-color light emission is provided. The light-emitting element includes a first electrode, a second electrode, and an EL layer between the first electrode and the second electrode. The EL layer includes a first injection layer, a first light-emitting layer, and a second light-emitting layer in a first region, and a second injection layer, the first light-emitting layer, and the second light-emitting layer in a second region. The first light-emitting layer includes a first light-emitting material and a first host material, and the second light-emitting layer includes a second light-emitting material and a second host material. A color of light emitted from the first region is different from that of light emitted from the second region.Type: ApplicationFiled: February 23, 2016Publication date: August 25, 2016Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shogo Uesaka, Nobuharu OHSAWA