Patents by Inventor Naoaki Hashimoto
Naoaki Hashimoto 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).
-
Patent number: 11659758Abstract: An object is to provide a highly reliable display unit having a function of sensing light. The display unit includes a light-receiving device and a light-emitting device. The light-receiving device includes an active layer between a pair of electrodes. The light-emitting device includes a hole-injection layer, a light-emitting layer, and an electron-transport layer between a pair of electrodes. The light-receiving device and the light-emitting device share one of the electrodes, and may further share another common layer between the pair of electrodes. The hole-injection layer is in contact with an anode and contains a first compound and a second compound. The electron-transport property of the electron-transport layer is low; hence, the light-emitting layer is less likely to have excess electrons. Here, the first compound is the material having a property of accepting electrons from the second compound.Type: GrantFiled: June 29, 2020Date of Patent: May 23, 2023Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Taisuke Kamada, Ryo Hatsumi, Daisuke Kubota, Naoaki Hashimoto, Tsunenori Suzuki, Harue Osaka, Satoshi Seo
-
Publication number: 20230150988Abstract: An organic compound has a benzonaphthofuran skeleton and is represented by General Formula (G1). In General Formula (G1), A represents a pyrene skeleton. In the case where the pyrene skeleton has a substituent, the substituent is a diarylamino group including two substituted or unsubstituted aryl groups each having 6 to 13 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, an alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon group having 3 to 20 carbon atoms, or a substituted or unsubstituted polycyclic saturated hydrocarbon group having 7 to 10 carbon atoms. The two aryl groups of the diarylamino group may be the same or different.Type: ApplicationFiled: January 12, 2023Publication date: May 18, 2023Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takuya Haruyama, Sachiko KAWAKAMI, Naoaki HASHIMOTO, Yusuke TAKITA, Tsunenori SUZUKI, Satoshi SEO
-
Publication number: 20230146354Abstract: A light-emitting device including at least a light-emitting layer between an anode and a cathode; the light-emitting layer contains at least a light-emitting substance; the light-emitting substance is a substance emitting fluorescent light; a first organic compound represented by General Formula (G1) is included between the anode and the cathode; in General Formula (G1), Ar1 represents a substituted or unsubstituted fluorenyl group, Ar2 represents a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and A1 represents a substituted or unsubstituted dibenzofuranyl group or a substituted or unsubstituted dibenzothiophenyl group; when at least one of Ar1, Ar2, and A1 has one or more substituents, the substituents each independently represent an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 13 carbon atoms. The aryl group exclude a heteroaryl group. The substituents may be bonded to each other to form a ring.Type: ApplicationFiled: August 12, 2022Publication date: May 11, 2023Inventors: Sachiko KAWAKAMI, Kaori OGITA, Nozomi KOMATSU, Tsunenori SUZUKI, Naoaki HASHIMOTO, Satoshi SEO, Kyoko TAKEDA
-
Publication number: 20230138085Abstract: A light-emitting device with a long lifetime is provided. A light-emitting device with a low driving voltage is provided. In the light-emitting device, an electron-transport layer includes an organometallic complex of an alkali metal and an organic compound having an electron-transport property; the organometallic complex and the organic compound form an exciplex in combination; a value (eV) obtained by converting into energy a peak wavelength of an emission spectrum of the exciplex formed with the organometallic complex and the organic compound having a mass ratio of 1:1 is smaller than a difference (eV) between a HOMO level of the organometallic complex and a LUMO level of the organic compound by greater than or equal to 0.1 eV.Type: ApplicationFiled: March 12, 2021Publication date: May 4, 2023Inventors: Sachiko KAWAKAMI, Naoaki HASHIMOTO, Satoshi SEO
-
Patent number: 11641777Abstract: An object is to provide a novel organic compound. Another object is to provide a novel light-emitting device. Another object is to provide a light-emitting device with favorable emission efficiency. Another object is to provide a light-emitting device with a favorable lifetime. Another object is to provide a light-emitting device with a low driving voltage. A dibenzo[c,g]carbazole derivative represented by the following general formula (G1) and a light-emitting device using it are provided. Note that at least one of R11 to R22 represents a substituent that has 14 to 60 carbon atoms in total and contains a condensed tricyclic to hexacyclic aromatic hydrocarbon skeleton, and the others independently represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 25 carbon atoms.Type: GrantFiled: November 12, 2018Date of Patent: May 2, 2023Inventors: Hiroshi Kadoma, Tsunenori Suzuki, Naoaki Hashimoto, Yusuke Takita, Satoshi Seo
-
Publication number: 20230124044Abstract: A light-emitting device with high emission efficiency is provided. The light-emitting device includes at least a light-emitting layer between an anode and a cathode. The light-emitting layer contains a light-emitting substance, a first organic compound, and a second organic compound. The light-emitting substance is a substance that emits fluorescent light. The first organic compound has any one of an anthracene skeleton, a tetracene skeleton, a phenanthrene skeleton, a pyrene skeleton, a chrysene skeleton, a carbazole skeleton, a benzocarbazole skeleton, a dibenzocarbazole skeleton, a dibenzofuran skeleton, a benzonaphthofuran skeleton, a bisnaphthofuran skeleton, a dibenzothiophene skeleton, a benzonaphthothiophene skeleton, a bisnaphthothiophene skeleton, and a fluoranthene skeleton.Type: ApplicationFiled: August 12, 2022Publication date: April 20, 2023Inventors: Tsunenori SUZUKI, Sachiko KAWAKAMI, Naoaki HASHIMOTO, Satoshi SEO
-
Publication number: 20230104201Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a long lifetime is provided. A light-emitting 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-injection layer, a light-emitting layer, and an electron-transport layer. The hole-injection layer is positioned between the anode and the light-emitting layer. The electron-transport layer is positioned between the light-emitting layer and the cathode. The hole-injection layer contains a first substance and a second substance. The first substance is an organic compound which has a hole-transport property and a HOMO level higher than or equal to ?5.7 eV and lower than or equal to ?5.4 eV. The second substance exhibits an electron-accepting property with respect to the first substance.Type: ApplicationFiled: October 26, 2022Publication date: April 6, 2023Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Satoshi Seo, Hiromi SEO, Kunihiko SUZUKI, Kanta ABE, Yuji IWAKI, Naoaki HASHIMOTO, Tsunenori SUZUKI
-
Publication number: 20230103249Abstract: 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.Type: ApplicationFiled: July 15, 2022Publication date: March 30, 2023Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Sachiko Kawakami, Yui Yoshiyasu, Nobuharu Ohsawa, Tsunenori Suzuki, Toshiki Sasaki, Naoaki Hashimoto, Tomohiro Kubota, Satoshi Seo
-
Publication number: 20230089346Abstract: A light-emitting device with high heat resistance is provided. The light-emitting layer device includes an anode, a cathode; and an EL layer between the anode and the cathode. The EL layer includes a light-emitting layer and a first layer. The first layer is between the light-emitting layer and the cathode. The light-emitting layer is in contact with the first layer. The light-emitting layer includes a first organic compound and a light-emitting substance. The first layer includes a second organic compound. The light-emitting substance is a substance that emits blue light. The first organic compound is an organic compound including a fused aromatic hydrocarbon ring. The second organic compound is an organic compound including a heteroaromatic ring skeleton including one selected from a pyridine ring, a diazine ring, and a triazine ring; and a bicarbazole skeleton.Type: ApplicationFiled: July 15, 2022Publication date: March 23, 2023Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Sachiko KAWAKAMI, Yui YOSHIYASU, Nobuharu OHSAWA, Tsunenori SUZUKI, Toshiki SASAKI, Naoaki HASHIMOTO, Tomohiro KUBOTA, Satoshi SEO
-
Publication number: 20230093163Abstract: A novel organic compound that is highly convenient, useful, or reliable is provided. The organic compound is represented by General Formula (G1). Note that at least one of R1 to R26 represents deuterium. At least one of R1 to R7 represents any one of an alkyl group, a cycloalkyl group, a trialkylsilyl group, and an aryl group. The others of R1 to R7 each independently represent any one of hydrogen, an alkyl group, a cycloalkyl group, a trialkylsilyl group, and an aryl group. R8 to R26 each independently represent any one of hydrogen, an alkyl group, a cycloalkyl group, a trialkylsilyl group, and an aryl group. The alkyl group has 3 to 10 carbon atoms, the cycloalkyl group has 3 to 10 carbon atoms, the trialkylsilyl group has 3 to 12 carbon atoms, and the aryl group has 6 to 25 carbon atoms.Type: ApplicationFiled: July 22, 2022Publication date: March 23, 2023Inventors: Takuya HARUYAMA, Sachiko KAWAKAMI, Tsunenori SUZUKI, Naoaki HASHIMOTO, Shiho NOMURA
-
Publication number: 20230076945Abstract: A light-emitting device having favorable heat resistance is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the first anode and the cathode. The EL layer includes a light-emitting layer and a first layer. The first layer is positioned between the light-emitting layer and the cathode. The light-emitting layer and the first layer are in contact with each other. The light-emitting layer contains a first organic compound, a second organic compound, and a light-emitting substance. The first layer contains a third organic compound. The first organic compound and the third organic compound each have an electron-transport property. The second organic compound has a hole-transport property. The light-emitting substance emits red light. The first organic compound is represented by General Formula (G100). The third organic compound is represented by General Formula (G300).Type: ApplicationFiled: July 12, 2022Publication date: March 9, 2023Inventors: Sachiko KAWAKAMI, Yui YOSHIYASU, Nobuharu OHSAWA, Tsunenori SUZUKI, Toshiki SASAKI, Naoaki HASHIMOTO, Tomohiro KUBOTA, Satoshi SEO
-
Patent number: 11569466Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. In the light-emitting element, an EL layer includes a hole-injection layer, a first hole-transport layer, a second hole-transport layer, a third hole-transport layer, a light-emitting layer, a first electron-transport layer, and a second electron-transport layer in this order; the hole-injection layer includes an organic acceptor; the LUMO level of the host material is higher than that of the first electron-transport layer; the LUMO level of the second electron-transport layer is higher than that of the first electron-transport layer; the host material is a substance including a condensed aromatic ring skeleton; and the first and second electron-transport layers each include a substance having a heteroaromatic ring skeleton.Type: GrantFiled: August 15, 2019Date of Patent: January 31, 2023Inventors: Satoshi Seo, Tsunenori Suzuki, Yusuke Takita, Naoaki Hashimoto
-
Publication number: 20230025460Abstract: 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.Type: ApplicationFiled: June 28, 2022Publication date: January 26, 2023Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yui Yoshiyasu, Sachiko KAWAKAMI, Naoaki HASHIMOTO, Tsunenori SUZUKI, Satoshi SEO
-
Patent number: 11555030Abstract: An organic compound has a benzonaphthofuran skeleton and is represented by General Formula (G1). In General Formula (G1), A represents a pyrene skeleton. In the case where the pyrene skeleton has a substituent, the substituent is a diarylamino group including two substituted or unsubstituted aryl groups each having 6 to 13 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, an alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon group having 3 to 20 carbon atoms, or a substituted or unsubstituted polycyclic saturated hydrocarbon group having 7 to 10 carbon atoms. The two aryl groups of the diarylamino group may be the same or different.Type: GrantFiled: April 20, 2018Date of Patent: January 17, 2023Inventors: Takuya Haruyama, Sachiko Kawakami, Naoaki Hashimoto, Yusuke Takita, Tsunenori Suzuki, Satoshi Seo
-
Patent number: 11489133Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with along lifetime is provided. A light-emitting 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-injection layer, a light-emitting layer, and an electron-transport layer. The hole-injection layer is positioned between the anode and the light-emitting layer. The electron-transport layer is positioned between the light-emitting layer and the cathode. The hole-injection layer contains a first substance and a second substance. The first substance is an organic compound which has a hole-transport property and a HOMO level higher than or equal to ?5.7 eV and lower than or equal to ?5.4 eV. The second substance exhibits an electron-accepting property with respect to the first substance.Type: GrantFiled: June 10, 2020Date of Patent: November 1, 2022Inventors: Satoshi Seo, Hiromi Seo, Kunihiko Suzuki, Kanta Abe, Yuji Iwaki, Naoaki Hashimoto, Tsunenori Suzuki
-
Publication number: 20220336755Abstract: 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.Type: ApplicationFiled: March 24, 2022Publication date: October 20, 2022Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yui Yoshiyasu, Naoaki Hashimoto, Tatsuyoshi Takahashi, Sachiko Kawakami, Satoshi Seo
-
Publication number: 20220285629Abstract: A novel mixed material with improved resistance is provided. The mixed material includes a first heteroaromatic compound and a second heteroaromatic compound, and the first heteroaromatic compound is represented by any one of General Formulae (G1) to (G6). The second heteroaromatic compound is not represented by the same general formula as that of the first heteroaromatic compound.Type: ApplicationFiled: February 14, 2022Publication date: September 8, 2022Inventors: Yui YOSHIYASU, Naoaki HASHIMOTO, Tatsuyoshi TAKAHASHI, Sachiko KAWAKAMI, Satoshi SEO
-
Publication number: 20220231238Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a favorable lifetime is provided. A light-emitting device with low driving voltage 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 hole-injection layer, a light-emitting layer, and an electron-transport layer. The hole-injection layer contains a hole-transport material and an electron-accepting material. The electron-transport layer contains an electron-transport material and an alkali metal itself, an alkaline earth metal itself, a compound of an alkali metal or an alkaline earth metal, or a complex thereof. The hole-injection layer has the spin density measured by an ESR method is lower than or equal to 1×1019 spins/cm3.Type: ApplicationFiled: April 13, 2020Publication date: July 21, 2022Inventors: Takumu OKUYAMA, Hiromi SEO, Naoaki HASHIMOTO, Yusuke TAKITA, Tsunenori SUZUKI, Satoshi SEO
-
Publication number: 20220209128Abstract: A novel light-emitting device is provided. A light-emitting device with high emission efficiency is provided. A light-emitting device with a favorable lifetime is provided. A light-emitting device with low driving voltage is provided. A light-emitting device with favorable display quality is provided. A light-emitting device that includes an anode, a cathode, and an EL layer positioned between the anode and the cathode, in which the EL layer includes a hole-injection layer, a light-emitting layer, and an electron-transport layer; in which the electron-transport layer contains an electron-transport material and an alkali metal, an alkaline earth metal, a compound of an alkali metal or an alkaline earth metal, or a complex thereof; and in which the resistivity of the hole-injection layer is within a certain range, is provided.Type: ApplicationFiled: April 21, 2020Publication date: June 30, 2022Inventors: Takumu OKUYAMA, Hiromi SEO, Naoaki HASHIMOTO, Yusuke TAKITA, Tsunenori SUZUKI, Satoshi SEO
-
Publication number: 20220194954Abstract: A novel organic compound is provided. Alternatively, an organic compound that exhibits light emission with favorable chromaticity is provided. Alternatively, an organic compound that exhibits blue light emission with favorable chromaticity is provided. Alternatively, an organic compound with favorable emission efficiency is provided. Alternatively, an organic compound having a high carrier-transport property is provided. Alternatively, an organic compound with favorable reliability is provided. An organic compound including at least one amino group in which any one of a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted carbazolyl group is boneded to any one of a substituted or unsubstituted naphthobisbenzofuran skeleton, a substituted or unsubstituted naphthobisbenzothiophene skeleton, and a substituted or unsubstituted naphthobenzofuranobenzothiophene skeleton is provided.Type: ApplicationFiled: January 13, 2022Publication date: June 23, 2022Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kyoko Takeda, Harue Osaka, Satoshi Seo, Tsunenori Suzuki, Naoaki Hashimoto, Yusuke Takita