Patents by Inventor Akinobu Hayakawa
Akinobu Hayakawa 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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Publication number: 20170278640Abstract: An object of the present invention is to provide a solar cell that is excellent in photoelectric conversion efficiency, suffers little degradation during encapsulation (initial degradation), has high-temperature durability, and is excellent in temperature cycle resistance. The present invention provides a solar cell including: a laminate having an electrode, a counter electrode, and a photoelectric conversion layer disposed between the electrode and the counter electrode; and an encapsulation material covering the counter electrode to encapsulate the laminate, the photoelectric conversion layer including an organic-inorganic perovskite compound represented by the formula: R-M-X3, R representing an organic molecule, M representing a metal atom, X representing a halogen atom or a chalcogen atom, the encapsulation material including a (meth)acrylic resin having a C atom/O atom ratio of 4 or more in the molecule.Type: ApplicationFiled: October 14, 2015Publication date: September 28, 2017Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Akinobu HAYAKAWA, Motohiko ASANO, Tomohito UNO, Mayumi HORIKI, Yuuichirou FUKUMOTO, Tetsuya KUREBAYASHI, Shunji OHARA
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Publication number: 20170236652Abstract: An object of the present invention is to provide a solar cell that is excellent in photoelectric conversion efficiency, suffers little degradation during encapsulation (initial degradation), has high-humidity durability, and is excellent in temperature cycle resistance. The present invention provides a solar cell including: a laminate having an electrode, a counter electrode, and a photoelectric conversion layer disposed between the electrode and the counter electrode; and an encapsulation material covering the counter electrode to encapsulate the laminate, the photoelectric conversion layer including an organic-inorganic perovskite compound represented by the formula: R-M-X3, R representing an organic molecule, M representing a metal atom, X representing a halogen atom or a chalcogen atom, the encapsulation material including a resin having at least one skeleton selected from the group consisting of polyisobutylene, polyisoprene, and polybutadiene.Type: ApplicationFiled: October 14, 2015Publication date: August 17, 2017Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Akinobu HAYAKAWA, Motohiko ASANO, Tomohito UNO, Mayumi HORIKI, Yuuichirou FUKUMOTO, Tetsuya KUREBAYASHI, Shunji OHARA
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Publication number: 20170221639Abstract: An object of the present invention is to provide a solar cell that is excellent in photoelectric conversion efficiency, suffers little degradation during encapsulation (initial degradation), and has high-temperature durability. The present invention provides a solar cell including: a laminate having an electrode, a counter electrode, and a photoelectric conversion layer disposed between the electrode and the counter electrode; and an encapsulation resin layer covering the counter electrode to encapsulate the laminate, the photoelectric conversion layer including an organic-inorganic perovskite compound represented by the formula: R-M-X3, R representing an organic molecule, M representing a metal atom, X representing a halogen atom or a chalcogen atom, the encapsulation resin layer including a resin having a solubility parameter, i.e., a SP value, of 10 or less.Type: ApplicationFiled: October 14, 2015Publication date: August 3, 2017Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Akinobu HAYAKAWA, Motohiko ASANO, Tomohito UNO, Mayumi HORIKI, Yuuichirou FUKUMOTO, Tetsuya KUREBAYASHI, Shunji OHARA
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Publication number: 20160240804Abstract: The present invention aims to provide a coating liquid for forming a semiconductor which facilitates large-area production of a semiconductor that is useful as a semiconductor material of a solar cell with high conversion efficiency and small variation in the conversion efficiency, and enables control of the film thickness. The present invention also aims to provide a semiconductor thin film produced from the coating liquid for forming a semiconductor, a thin film solar cell, and a method for producing the thin film solar cell. The present invention relates to a coating liquid for forming a semiconductor, including a complex that includes a group 15 metal element of the periodic table and sulfur and/or selenium, the coating liquid having a molar ratio of the group 15 metal element of the periodic table to the sulfur and/or selenium of 1:2 to 1:10.Type: ApplicationFiled: November 4, 2014Publication date: August 18, 2016Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Akinobu HAYAKAWA, Shunji OHARA, Mayumi HORIKI, Kazushi ITO
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Publication number: 20160226009Abstract: The present invention provides a thin film solar cell which can exhibit high photoelectric conversion efficiency. The present invention aims to provide a semiconductor thin film intended to be used in the thin film solar cell and to a coating liquid for forming a semiconductor which can facilitate large-area production of the thin film solar cell to improve production stability. The present invention relates to a thin film solar cell including a photoelectric conversion layer. The photoelectric conversion layer includes a portion that includes a sulfide of a group 15 element of the periodic table and/or a selenide of a group 15 element of the periodic table and a compound containing at least one element selected from the group consisting of a rare earth element, titanium, and zinc.Type: ApplicationFiled: September 24, 2014Publication date: August 4, 2016Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Mayumi HORIKI, Kazushi ITO, Akinobu HAYAKAWA, Shunji OHARA
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Patent number: 9337379Abstract: The present invention aims to provide a method of producing a solar cell which can produce a porous inorganic oxide layer that has a high porosity and contains less impurities even by low-temperature firing. The present invention also aims to provide a solar cell produced by the method of producing a solar cell. The present invention directs to a method of producing a solar cell. The method includes: applying an inorganic oxide paste that contains inorganic oxide fine particles, a binder resin, and an organic solvent to a surface of a base to form an inorganic oxide layer on the base, the base including a conductive layer as an outermost layer thereof, the surface being a conductive layer-side surface; firing the inorganic oxide layer; irradiating the inorganic oxide layer with active energy rays or subjecting the inorganic oxide layer to ozonolysis to form a porous inorganic oxide layer; and laminating a semiconductor on the porous inorganic oxide layer.Type: GrantFiled: November 22, 2013Date of Patent: May 10, 2016Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Mayumi Horiki, Akinobu Hayakawa, Shunji Ohara, Taku Sasaki, Kazushi Ito
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Publication number: 20150318480Abstract: The present invention aims to provide a solar cell having high photoelectric conversion efficiency and excellent durability. The present invention relates to a solar cell including at least: a cathode; an anode; a photoelectric conversion layer provided between the cathode and the anode; and a hole transport layer provided between the photoelectric conversion layer and the anode, the hole transport layer containing an organic semiconductor, the organic semiconductor having a carboxyl group and having a conjugated structure.Type: ApplicationFiled: November 7, 2013Publication date: November 5, 2015Inventors: Shunji OHARA, Akinobu HAYAKAWA, Mayumi HORIKI, Kazushi ITO
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Publication number: 20150280019Abstract: It is an object of the present invention to provide a solar cell capable of exhibiting excellent photoelectric conversion efficiency even when ultraviolet light is blocked. The present invention relates to a solar cell including: a cathode; an anode; a photoelectric conversion layer disposed between the cathode and the anode; and an electron transport layer disposed between the cathode and the photoelectric conversion layer, the electron transport layer containing titanium oxide and at least one element selected from the group consisting of pentavalent elements and hexavalent elements.Type: ApplicationFiled: October 29, 2013Publication date: October 1, 2015Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Shunji Ohara, Akinobu Hayakawa, Mayumi Horiki, Kazushi Ito
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Publication number: 20150263217Abstract: The present invention aims to provide a method of producing a solar cell which can produce a porous inorganic oxide layer that has a high porosity and contains less impurities even by low-temperature firing. The present invention also aims to provide a solar cell produced by the method of producing a solar cell. The present invention directs to a method of producing a solar cell. The method includes: applying an inorganic oxide paste that contains inorganic oxide fine particles, a binder resin, and an organic solvent to a surface of a base to form an inorganic oxide layer on the base, the base including a conductive layer as an outermost layer thereof, the surface being a conductive layer-side surface; firing the inorganic oxide layer; irradiating the inorganic oxide layer with active energy rays or subjecting the inorganic oxide layer to ozonolysis to form a porous inorganic oxide layer; and laminating a semiconductor on the porous inorganic oxide layer.Type: ApplicationFiled: November 22, 2013Publication date: September 17, 2015Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Mayumi Horiki, Akinobu Hayakawa, Shunji Ohara, Taku Sasaki, Kazushi Ito
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Publication number: 20150107673Abstract: The present invention aims to provide a sulfide semiconductor-forming coating liquid capable of easily forming a sulfide semiconductor having a large area, the sulfide semiconductor being useful as a semiconductor material for photoelectric conversion materials. The present invention also aims to provide a sulfide semiconductor thin film produced using the sulfide semiconductor-forming coating liquid; and a thin film solar cell. The present invention provides a sulfide semiconductor-forming coating liquid, the coating liquid containing a complex containing a metal element of group 15 of the periodic table and sulfur.Type: ApplicationFiled: April 24, 2013Publication date: April 23, 2015Inventors: Kazushi Ito, Akinobu Hayakawa, Shunji Ohara, Ren-de Sun
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Patent number: 9011629Abstract: An adhesive for electronic components, including a curable compound, a curing agent, and an inorganic filler, wherein A1 and A2/A1 fall within a range surrounded by solid lines and a dashed line in Fig. 1A wherein a viscosity at 5 rpm measured at 25° C. using an E type viscometer is A1 (Pa·s) and a viscosity at 0.5 rpm measured at 25° C. using an E type viscometer is A2 (Pa·s), the range including values on the solid lines but not including values on the dashed line, and a blending amount of the curing agent is 5 to 150 parts by weight and a blending amount of the inorganic filler is 60 to 400 parts by weight based on 100 parts by weight of the curable compound.Type: GrantFiled: March 8, 2012Date of Patent: April 21, 2015Assignee: Sekisui Chemical Co., Ltd.Inventors: Carl Alvin Dilao, Akinobu Hayakawa, Shujiro Sadanaga, Munehiro Hatai
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Publication number: 20150027540Abstract: The present invention aims to provide an organic thin-film solar cell that has a high photoelectric conversion efficiency, little dispersion in the photoelectric conversion efficiency in a photoelectric conversion layer, and excellent durability. The present invention is an organic thin-film solar cell including a photoelectric conversion layer, wherein the photoelectric conversion layer includes a portion containing a sulfide of a Group 15 element in the periodic table and a portion containing an organic semiconductor having a molecular weight of less than 10,000, and the portion containing a sulfide of a Group 15 element in the periodic table and the portion containing an organic semiconductor having a molecular weight of less than 10,000 contact with each other.Type: ApplicationFiled: February 7, 2013Publication date: January 29, 2015Inventors: Akinobu Hayakawa, Kazushi Ito, Ren-de Sun
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Publication number: 20150000745Abstract: The present invention aims to provide an organic thin-film solar cell that has a high photoelectric conversion efficiency and excellent durability. The present invention relates to an organic thin-film solar cell including a photoelectric conversion layer, wherein the photoelectric conversion layer includes a portion containing a sulfide of a Group 15 element in the periodic table and a portion containing a donor-acceptor organic semiconductor, and the portion containing a sulfide of a Group 15 element in the periodic table and the portion containing a donor-acceptor organic semiconductor are in contact with each other.Type: ApplicationFiled: February 7, 2013Publication date: January 1, 2015Inventors: Akinobu Hayakawa, Kazushi Ito, Ren-de Sun
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Publication number: 20140366948Abstract: The present invention aims to provide an organic thin-film solar cell that has a high photoelectric conversion efficiency and excellent durability. The present invention is an organic thin-film solar cell including a photoelectric conversion layer, wherein the photoelectric conversion layer includes a portion containing a sulfide of a Group 15 element in the periodic table and an organic semiconductor portion contacting with each other, and the organic semiconductor portion comprises an organic semiconductor, the organic semiconductor comprising a polythiophene derivative, a phthalocyanine derivative, a naphthalocyanine derivative, or a benzoporphyrin derivative.Type: ApplicationFiled: February 7, 2013Publication date: December 18, 2014Applicant: Sekisui Chemical Co., Ltd.Inventors: Akinobu Hayakawa, Kazushi Ito, Ren-de Sun
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Patent number: 8901207Abstract: It is an object of the present invention to provide an adhesive for electronic components that prevents warpage of electronic components and reflow cracks even in the case of bonding thin electronic components. The present invention relates to an adhesive for electronic components, comprising: an epoxy compound having an aliphatic polyether backbone and a glycidyl ether group; an epoxy group-containing acrylic polymer; an episulfide compound; and a curing agent, wherein the amount of the episulfide compound is 1 parts by weight or more, and less than 30 parts by weight relative to 100 parts by weight of the epoxy compound having an aliphatic polyether backbone and a glycidyl ether group.Type: GrantFiled: January 29, 2010Date of Patent: December 2, 2014Assignee: Sekisui Chemical Co., Ltd.Inventors: Akinobu Hayakawa, Hideaki Ishizawa, Kohei Takeda, Ryohei Masui
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Patent number: 8563362Abstract: A method for producing a semiconductor chip laminate, which comprises applying an adhesive to a substrate or other semiconductor chip; laminating the semiconductor chip on the substrate or other semiconductor chip via the adhesive; uniformly wetting and spreading the adhesive on an entire region for bonding the semiconductor chip on the substrate or other semiconductor chip; and curing the adhesive. In the application step, an area for applying adhesive is 40% to 90% of the region for bonding the semiconductor chip located on the substrate or other semiconductor chip, immediately after laminating, an area with the adhesive thereon is 60% to less than 100% of the region for bonding the semiconductor chip on the substrate or other semiconductor chip, and in wetting and spreading the adhesive, a viscosity of adhesive between the substrate or other semiconductor chips and the semiconductor chip at 0.5 rpm is 1 Pas to 30 Pas.Type: GrantFiled: March 10, 2010Date of Patent: October 22, 2013Assignee: Sekisui Chemical Co., Ltd.Inventors: Akinobu Hayakawa, Hideaki Ishizawa, Kohei Takeda, Ryohei Masui
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Publication number: 20130237018Abstract: An object of the present invention is to provide an adhesive for electronic components that allows suppression of occurrence of voids and is prevented from wicking up to an upper surface of a semiconductor chip. Another object of the present invention is to provide a production method for a semiconductor chip mount using the adhesive for electronic components. The present invention is an adhesive for electronic components, including a curable compound, a curing agent, and an inorganic filler, wherein A1 and A2/A1 fall within a range surrounded by solid lines and a dashed line in FIG. 1 wherein a viscosity at 5 rpm measured at 25° C. using an E type viscometer is A1 (Pa·s) and a viscosity at 0.5 rpm measured at 25° C.Type: ApplicationFiled: March 8, 2012Publication date: September 12, 2013Applicant: Sekisui Chemical Co., Ltd.Inventors: Carl Alvin Dilao, Akinobu Hayakawa, Shujiro Sadanaga, Munehiro Hatai
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Publication number: 20130199613Abstract: The present invention aims to provide an ink for an active layer of an organic solar cell, wherein an active layer having high energy conversion efficiency can be stably and easily formed from the ink; an organic solar cell having high energy conversion efficiency; and a method for producing the organic solar cell.Type: ApplicationFiled: November 15, 2011Publication date: August 8, 2013Inventors: Akinobu Hayakawa, Kazushi Ito, Taku Sasaki
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Publication number: 20120021233Abstract: It is an object of the present invention to provide a method for producing a semiconductor chip laminate, which adjusts the amount of an adhesive for semiconductor components extending from a bonded region of a semiconductor chip and provides a smaller but highly-precise and highly-reliable semiconductor chip laminate.Type: ApplicationFiled: March 10, 2010Publication date: January 26, 2012Applicant: Sekisui Chemical Co., Ltd.Inventors: Akinobu Hayakawa, Hideaki Ishizawa, Kohei Takeda, Ryohei Masui
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Publication number: 20120016057Abstract: It is an object of the present invention to provide an adhesive for electronic components that prevents warpage of electronic components and reflow cracks even in the case of bonding thin electronic components. The present invention relates to an adhesive for electronic components, comprising: an epoxy compound having an aliphatic polyether backbone and a glycidyl ether group; an epoxy group-containing acrylic polymer; an episulfide compound; and a curing agent, wherein the amount of the episulfide compound is 1 parts by weight or more, and less than 30 parts by weight relative to 100 parts by weight of the epoxy compound having an aliphatic polyether backbone and a glycidyl ether group.Type: ApplicationFiled: January 29, 2010Publication date: January 19, 2012Inventors: Akinobu Hayakawa, Hideaki Ishizawa, Kohei Takeda, Ryohei Masui