Patents by Inventor Katsuyuki Yofu
Katsuyuki Yofu 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: 8809847Abstract: A photoelectric conversion device includes an organic photoelectric conversion layer, and suppresses sensitivity degradation caused by the light irradiation. A photoelectric conversion device 100 is formed by stacking a first electrode layer 104, a photoelectric conversion layer 15 including an organic material, and a second electrode layer 108 on a substrate 101, in which the photoelectric conversion layer 15 has a bulk hetero structure of a P-type organic semiconductor and an N-type organic semiconductor, and a difference between an ionization potential of the P-type organic semiconductor and an apparent ionization potential of the bulk hetero structure is 0.50 eV or less. Accordingly, it is possible to suppress sensitivity degradation caused by the light irradiation.Type: GrantFiled: March 22, 2011Date of Patent: August 19, 2014Assignee: FUJIFILM CorporationInventors: Daigo Sawaki, Katsuyuki Yofu
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Patent number: 8686408Abstract: A photoelectric conversion device is provided and includes: a first electrode, a second electrode, and a photoelectric conversion layer between the first and second electrodes, the photoelectric conversion layer containing a mixture of an organic photoelectric conversion dye, a fullerene or a fullerene derivative, and a fullerene polymer; various embodiments of the device, a photosensor, an imaging device, and production methods for these devices.Type: GrantFiled: February 24, 2011Date of Patent: April 1, 2014Assignee: FUJIFILM CorporationInventors: Katsuyuki Yofu, Daigo Sawaki
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Publication number: 20130299799Abstract: A photoelectric conversion device comprising an electrically conductive film, an organic photoelectric conversion film, and a transparent electrically conductive film, wherein the organic photoelectric conversion film contains a compound represented by the following formula (1) and an n-type organic semiconductor: wherein each of R1 and R2 independently represents a substituted aryl group, an unsubstituted aryl group, a substituted heteroaryl group or an unsubstituted heteroaryl group, each of R3 to R11 independently represents a hydrogen atom or a substituent provided that an acidic group is excluded, m represents 0 or 1, n represents an integer of 0 or more, R1 and R2, R3 and R4, R3 and R5, R5 and R6, R6 and R8, R7 and R8, R7 and R9, or R10 and R11 may be combined each other to form a ring, and when n is an integer of 2 or more, out of a plurality of R7's and R8's, a pair of R7's, a pair of R8's, or a pair of R7 and R8 may be combined each other to form a ring.Type: ApplicationFiled: July 18, 2013Publication date: November 14, 2013Inventors: Katsuyuki YOFU, Kimiatsu NOMURA, Mitsumasa HAMANO, Tetsuro MITSUI
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Patent number: 8525577Abstract: A photoelectric conversion device comprising an electrically conductive film, an organic photoelectric conversion film, and a transparent electrically conductive film, wherein the organic photoelectric conversion film contains a compound represented by the following formula (1) and an n-type organic semiconductor: wherein each of R1 and R2 independently represents a substituted aryl group, an unsubstituted aryl group, a substituted heteroaryl group or an unsubstituted heteroaryl group, each of R3 to R11 independently represents a hydrogen atom or a substituent provided that an acidic group is excluded, m represents 0 or 1, n represents an integer of 0 or more, R1 and R2, R3 and R4, R3 and R5, R5 and R6, R6 and R8, R7 and R8, R7 and R9, or R10 and R11 may be combined each other to form a ring, and when n is an integer of 2 or more, out of a plurality of R7's and R8's, a pair of R7's, a pair of R8's, or a pair of R7 and R8 may be combined each other to form a ring.Type: GrantFiled: September 28, 2010Date of Patent: September 3, 2013Assignee: FUJIFILM CorporationInventors: Katsuyuki Yofu, Kimiatsu Nomura, Mitsumasa Hamano, Tetsuro Mitsui
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Publication number: 20130015435Abstract: A photoelectric conversion device includes an organic photoelectric conversion layer, and suppresses sensitivity degradation caused by the light irradiation. A photoelectric conversion device 100 is formed by stacking a first electrode layer 104, a photoelectric conversion layer 15 including an organic material, and a second electrode layer 108 on a substrate 101, in which the photoelectric conversion layer 15 has a bulk hetero structure of a P-type organic semiconductor and an N-type organic semiconductor, and a difference between an ionization potential of the P-type organic semiconductor and an apparent ionization potential of the bulk hetero structure is 0.50 eV or less. Accordingly, it is possible to suppress sensitivity degradation caused by the light irradiation.Type: ApplicationFiled: March 22, 2011Publication date: January 17, 2013Applicant: FUJIFILM CORPORATIONInventors: Daigo Sawaki, Katsuyuki Yofu
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Patent number: 8338691Abstract: A photoelectric conversion element is provided and includes: an electrically conductive thin layer; an organic photoelectric conversion layer; and a transparent electrically conductive thin layer. The organic photoelectric conversion layer contains: a compound represented by formula (I); and a fullerene or a fullerene derivative. In the formula, Z1 represents an atomic group necessary for forming a 5- or 6-membered ring, L1, L2 and L3 each independently represents an unsubstituted methine group or a substituted methine group, D1 represents an atomic group, and n represents an integer of 0 or more.Type: GrantFiled: March 6, 2009Date of Patent: December 25, 2012Assignee: FUJIFILM CorporationInventors: Tetsuro Mitsui, Kimiatsu Nomura, Mitsumasa Hamano, Katsuyuki Yofu
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Publication number: 20120313088Abstract: A photoelectric conversion device is provided and includes: a first electrode, a second electrode, and a photoelectric conversion layer between the first and second electrodes, the photoelectric conversion layer containing a mixture of an organic photoelectric conversion dye, a fullerene or a fullerene derivative, and a fullerene polymer; various embodiments of the device, a photosensor, an imaging device, and production methods for these devices.Type: ApplicationFiled: February 24, 2011Publication date: December 13, 2012Applicant: FUJIFILM CORPORATIONInventors: Katsuyuki Yofu, Daigo Sawaki
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Patent number: 8133581Abstract: An electroconductive polymer composition of the invention contains a conductive polymer and a trivalent phosphorus compound. The trivalent phosphorus compound is preferably a compound represented by the following Formulae (I) to (IV). In Formulae (I) to (IV), R1 to R12 each independently represent a hydrogen atom, an alkyl group, an aryl group or a heteroaryl group. An electroconductive polymer material of the invention has a layer formed by using the conductive polymer composition, or has a layer containing a conductive polymer and a layer containing a trivalent phosphorus compound separately.Type: GrantFiled: May 14, 2009Date of Patent: March 13, 2012Assignee: FUJIFILM CorporationInventors: Takashi Kato, Katsuyuki Yofu
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Publication number: 20110074491Abstract: A photoelectric conversion device comprising an electrically conductive film, an organic photoelectric conversion film, and a transparent electrically conductive film, wherein the organic photoelectric conversion film contains a compound represented by the following formula (1) and an n-type organic semiconductor: wherein each of R1 and R2 independently represents a substituted aryl group, an unsubstituted aryl group, a substituted heteroaryl group or an unsubstituted heteroaryl group, each of R3 to R11 independently represents a hydrogen atom or a substituent provided that an acidic group is excluded, m represents 0 or 1, n represents an integer of 0 or more, R1 and R2, R3 and R4, R3 and R5, R5 and R6, R6 and R8, R7 and R8, R7 and R9, or R10 and R11 may be combined each other to form a ring, and when n is an integer of 2 or more, out of a plurality of R7's and R8's, a pair of R7's, a pair of R8's, or a pair of R7 and R8 may be combined each other to form a ring.Type: ApplicationFiled: September 28, 2010Publication date: March 31, 2011Applicant: FUJIFILM CORPORATIONInventors: Katsuyuki YOFU, Kimiatsu NOMURA, Mitsumasa HAMANO, Tetsuro MITSUI
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Publication number: 20110056562Abstract: A compound represented by the following formula (I), and a photoelectric conversion device containing the compound: wherein Z1 is a ring containing two carbon atoms and represents a 5-membered ring, a 6-membered ring or a condensed ring containing at least either a 5-membered ring or a 6-membered ring, each of L1, L2 and L3 independently represents an unsubstituted methine group or a substituted methine group, n represents an integer of 0 or more, each of R1, R2, R3, R4, R5 and R6 independently represents a hydrogen atom or a substituent, R1 and R2, R2 and R3, R4 and R5, or R5 and R6 may be combined with each other to form a ring, and each of R21 and R22 independently represents a substituted aryl group, an unsubstituted aryl group, a substituted heteroaryl group or an unsubstituted heteroaryl group, provided that the case where both R21 and R22 are an unsubstituted phenyl group is excluded.Type: ApplicationFiled: September 8, 2010Publication date: March 10, 2011Applicant: FUJIFILM CORPORATIONInventors: Mitsumasa HAMANO, Katsuyuki YOFU, Tetsuro MITSUI, Kimiatsu NOMURA
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Patent number: 7898625Abstract: A liquid crystal device including a pair of electrodes provided with a vertical alignment film and a liquid crystal layer disposed between the pair of electrodes and including a liquid crystal composition containing a liquid crystal with positive dielectric anisotropy, a dichroic dye and a chiral reagent, with a ratio (P/G) of a chiral pitch length (P) of the liquid crystal composition to a gap (G) between the pair of electrodes being from 0.06 to less than 1.0.Type: GrantFiled: August 28, 2008Date of Patent: March 1, 2011Assignee: Fujifilm CorporationInventors: Naoyuki Hayashi, Takashi Kato, Koji Takaku, Katsuyuki Yofu
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Publication number: 20100308311Abstract: Provided is a photoelectric conversion device comprising a transparent electrically conductive film, a photoelectric conversion film, and an electrically conductive film, wherein the photoelectric conversion film contains a compound represented by the following formula (i): wherein each of R2 to R9 independently represents a hydrogen atom or a substituent, provided that each of at least two out of R3, R4, R7 and R8 independently represents an aryl group, a heterocyclic group or —N(Ra)(Rb), each of Ra and Rb independently represents a hydrogen atom or a substituent, and at least either Ra or Rb represents an aryl group or a heterocyclic group; and R1 represents an alkyl group, an aryl group or a heterocyclic group.Type: ApplicationFiled: June 3, 2010Publication date: December 9, 2010Applicant: FUJIFILM CORPORATIONInventors: Tetsuro MITSUI, Kimiatsu NOMURA, Katsuyuki YOFU
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Patent number: 7736533Abstract: A liquid crystal composition including a liquid crystal and at least three anthraquinone dyes, at least two of the anthraquinone dyes having a substituent represented by the following Formula (I): wherein in Formula (I), * represents a linking position; R25 and R26 each independently represent an alkyl group, a halogen atom or an alkoxy group; R27 represents an alkyl group, an acyl group or an alkoxy group; R28 and R29 each independently represent a hydrogen atom or a substitutent; T1 represents an arylene group or a heteroarylene group; Z represents an oxygen atom, a sulfur atom or a carbonyl group; m represents an integer of 0 to 2; and i represents 0 or 1, wherein when i is 1 and Z is an oxygen atom or a sulfur atom, R27 is not an alkoxy group, and when i is 1 and Z is a carbonyl group, R27 is not an acyl group.Type: GrantFiled: October 6, 2008Date of Patent: June 15, 2010Assignee: FUJIFILM CorporationInventors: Koji Takaku, Katsuyuki Yofu, Naoyuki Hayashi, Takashi Kato
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Publication number: 20100136329Abstract: An electroconductive polymer composition of the invention contains a conductive polymer and a trivalent phosphorus compound. The trivalent phosphorus compound is preferably a compound represented by the following Formulae (I) to (IV). In Formulae (I) to (IV), R1 to R12 each independently represent a hydrogen atom, an alkyl group, an aryl group or a heteroaryl group. An electroconductive polymer material of the invention has a layer formed by using the conductive polymer composition, or has a layer containing a conductive polymer and a layer containing a trivalent phosphorus compound separately.Type: ApplicationFiled: May 14, 2009Publication date: June 3, 2010Applicant: FUJIFILM CORPORATIONInventors: Takashi KATO, Katsuyuki YOFU
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Publication number: 20100047624Abstract: The electroconductive film of the present invention contains an electroconductive polymer and a compound represented by the following Formula (1). In Formula (1), Y is a hydrogen atom, a carbon atom, a hetero atom, a hydroxy group, a mercapto group, a group derived from an amino group, a group derived from an alkyl group, a group derived from an acyl group, a group derived from an aryl group, a group derived from an alkoxy group, a group derived from an aryloxy group, or a group derived from a heteroaryl group. L is a single bond, a divalent hydrocarbon group, a divalent hetero atom or an imino group. m is an integer of 1 or more.Type: ApplicationFiled: August 13, 2009Publication date: February 25, 2010Applicant: FUJIFILM CORPORATIONInventors: Katsuyuki YOFU, Takashi KATO, Naoyuki HAYASHI
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Publication number: 20100039595Abstract: A liquid crystal device including a pair of electrodes provided with a vertical alignment film and a liquid crystal layer disposed between the pair of electrodes and including a liquid crystal composition containing a liquid crystal with positive dielectric anisotropy, a dichroic dye and a chiral reagent, with a ratio (P/G) of a chiral pitch length (P) of the liquid crystal composition to a gap (G) between the pair of electrodes being from 0.06 to less than 1.0.Type: ApplicationFiled: August 28, 2008Publication date: February 18, 2010Inventors: Naoyuki Hayashi, Takashi Kato, Koji Takaku, Katsuyuki Yofu
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Publication number: 20090223566Abstract: A photoelectric conversion element is provided and includes: an electrically conductive thin layer; an organic photoelectric conversion layer; and a transparent electrically conductive thin layer. The organic photoelectric conversion layer contains: a compound represented by formula (I); and a fullerene or a fullerene derivative. In the formula, Z1 represents an atomic group necessary for forming a 5- or 6-membered ring, L1, L2 and L3 each independently represents an unsubstituted methine group or a substituted methine group, D1 represents an atomic group, and n represents an integer of 0 or more.Type: ApplicationFiled: March 6, 2009Publication date: September 10, 2009Applicant: FUJIFILM CorporationInventors: Tetsuro Mitsui, Kimiatsu Nomura, Mitsumasa Hamano, Katsuyuki Yofu
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Publication number: 20090220796Abstract: The electro-conductive polymer composition of the present invention contains an electro-conductive polymer and a compound represented by the following Formula (1). In Formula (1), R1 represents a hydrogen atom, an alkyl group, an acyl group, an aryl group, an alkoxy group, an aryloxy group or a heteroaryl group. R2 represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group or a sulfonyl group.Type: ApplicationFiled: February 19, 2009Publication date: September 3, 2009Applicant: FUJIFILM CORPORATIONInventors: Takashi Kato, Katsuyuki Yofu
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Publication number: 20090098314Abstract: A liquid crystal composition including a liquid crystal and at least three anthraquinone dyes, at least two of the anthraquinone dyes having a substituent represented by the following Formula (I): wherein in Formula (I), * represents a linking position; R25 and R26 each independently represent an alkyl group, a halogen atom or an alkoxy group; R27 represents an alkyl group, an acyl group or an alkoxy group; R28 and R29 each independently represent a hydrogen atom or a substitutent; T1 represents an arylene group or a heteroarylene group; Z represents an oxygen atom, a sulfur atom or a carbonyl group; m represents an integer of 0 to 2; and i represents 0 or 1, wherein when i is 1 and Z is an oxygen atom or a sulfur atom, R27 is not an alkoxy group, and when i is 1 and Z is a carbonyl group, R27 is not an acyl group.Type: ApplicationFiled: October 6, 2008Publication date: April 16, 2009Applicant: FUJIFILM CORPORATIONInventors: Koji Takaku, Katsuyuki Yofu, Naoyuki Hayashi, Takashi Kato