Patents Assigned to Hodogaya Chemical Co., Ltd.
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Patent number: 10326079Abstract: An organic electroluminescent device having low driving voltage, high luminous efficiency, and a long lifetime is provided by combining various materials for an organic electroluminescent device. In the organic electroluminescent device having at least an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light emitting layer, an electron transport layer, and a cathode in this order, the hole injection layer includes an arylamine compound of the following general formula (1) and an electron acceptor. In the formula, Ar1 to Ar4 may be the same or different, and represent a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group.Type: GrantFiled: April 26, 2016Date of Patent: June 18, 2019Assignee: Hodogaya Chemical Co., Ltd.Inventors: Shuichi Hayashi, Shunji Mochizuki, Takeshi Yamamoto, Naoaki Kabasawa
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Patent number: 10276800Abstract: The present invention provides an organic EL device having at least an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a luminous layer, an electron transport layer, and a cathode in order of description. The second hole transport layer includes an arylamine compound having a specific structure, and the electron transport layer includes a pyrimidine derivative having a specific structure. The organic EL device of the present invention has a high efficiency, a low driving voltage, and a longer life.Type: GrantFiled: November 12, 2015Date of Patent: April 30, 2019Assignee: HODOGAYA CHEMICAL CO., LTD.Inventors: Shuichi Hayashi, Daizo Kanda, Kazunori Togashi
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Publication number: 20190051838Abstract: According to the present invention, there is provided an organic electroluminescence element including at least an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode in the stated order, the organic electroluminescence element being characterized in that: the hole injection layer contains an arylamine compound represented by the following general formula (1) and an electron acceptor. The organic EL element of the present invention has a high light emission efficiency and an excellent durability, as compared with the related art, while maintaining the existing low drive voltage.Type: ApplicationFiled: February 8, 2017Publication date: February 14, 2019Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: NORIMASA YOKOYAMA, SHUICHI HAYASHI, NAOAKI KABASAWA, TAKESHI YAMAMOTO
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Publication number: 20180362843Abstract: The present invention provides an organic EL device having at least an anode, a hole transport layer, a luminous layer, an electron transport layer, and a cathode in this order, wherein the hole transport layer contains an arylamine compound represented by the following general formula (1), and the luminous layer contains a dihydroindenoindole derivative represented by the following general formula (2) or a carbazole derivative represented by the following general formula (3). The organic EL device of the present invention has a high efficiency, is driven at a low driving voltage, and has a particularly long lifetime.Type: ApplicationFiled: December 7, 2016Publication date: December 20, 2018Applicant: Hodogaya Chemical Co., Ltd.Inventors: Shuichi HAYASHI, Naoaki KABASAWA, Takeshi YAMAMOTO, Shunji MOCHIZUKI
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Publication number: 20180351101Abstract: The present invention provides an organic EL device having at least an anode, a hole-transporting layer, a luminous layer, an electron-transporting layer and a cathode arranged in this order, wherein the hole-transporting layer contains an arylamine compound represented by the following general formula (1). The organic EL device of the present invention has a high efficiency, drives on a low voltage, and features a specifically long life.Type: ApplicationFiled: November 16, 2016Publication date: December 6, 2018Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Kazuyuki SURUGA, Kouki KASE, Junichi IZUMIDA, Syunji MOCHIDUKI
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Publication number: 20180315928Abstract: An organic electroluminescent device having low driving voltage, high luminous efficiency, and a long lifetime is provided by combining various materials for an organic electroluminescent device. In the organic electroluminescent device having at least an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light emitting layer, an electron transport layer, and a cathode in this order, the hole injection layer includes an arylamine compound of the following general formula (1) and an electron acceptor. In the formula, Ar1 to Ar4 may be the same or different, and represent a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group.Type: ApplicationFiled: April 26, 2016Publication date: November 1, 2018Applicant: Hodogaya Chemical Co., Ltd.Inventors: Shuichi Hayashi, Shunji Mochizuki, Takeshi Yamamoto, Naoaki Kabasawa
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Publication number: 20180294416Abstract: The present invention provides an organic EL device having at least an anode, a first hole transport layer, a second hole transport layer, a luminous layer, an electron transport layer, and a cathode in this order, wherein the second hole transport layer contains an arylamine compound represented by the following general formula (1), and the electron transport layer contains a pyrimidine derivative represented by the following general formula (2). The organic EL device of the present invention has a high efficiency, and is driven at a low driving voltage. Further, it has a particularly long lifetime.Type: ApplicationFiled: September 15, 2016Publication date: October 11, 2018Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Shuichi HAYASHI, Naoaki KABASAWA, Keigo NAITO
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Patent number: 10096779Abstract: Pyrimidine derivatives of the present invention are represented by the following general formula (1), wherein W, X, Y and Z are carbon atoms or nitrogen atoms under the condition that only any one is a nitrogen atom to which none of the groups R6 to R9 are bonded, A and B are single bonds, divalent aromatic hydrocarbon groups or divalent aromatic heterocyclic groups, Ar1 and Ar2 are monovalent aromatic hydrocarbon groups or monovalent aromatic heterocyclic groups, and R1 to R9 are hydrogen atoms, deuterium atoms, fluorine atoms, chlorine atoms, cyano groups, alkyl groups having 1 to 6 carbon atoms, monovalent aromatic hydrocarbon groups or monovalent aromatic heterocyclic groups. The compound excels in electron injection/transporting capability, features high hole-blocking power and high stability in the form of a thin film, and can be favorably used as a material for producing highly efficient and durable organic EL devices.Type: GrantFiled: May 15, 2014Date of Patent: October 9, 2018Assignee: HODOGAYA CHEMICAL CO., LTD.Inventors: Norimasa Yokoyama, Naoaki Kabasawa, Shuichi Hayashi, Jeong-Soo Kim
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Publication number: 20180277761Abstract: An organic electroluminescent device having low driving voltage, high luminous efficiency, and a long lifetime is provided by combining various materials for an organic EL device, which are excellent, as materials for an organic electroluminescent device having high efficiency and high durability, in hole and electron injection/transport performances, electron blocking ability, stability in a thin-film state and durability, so as to allow the respective materials to effectively reveal their characteristics. In the organic electroluminescent device having at least an anode, a hole transport layer, a light emitting layer, an electron transport layer and a cathode in this order, the hole transport layer includes an arylamine compound represented by the following general formula (1), and the light emitting layer includes an amine derivative of the following general formula (2) having a condensed ring structure.Type: ApplicationFiled: November 6, 2015Publication date: September 27, 2018Applicants: Hodogaya Chemical Co., Ltd., SFC Co., Ltd., SFC Co., Ltd.Inventors: Shuichi Hayashi, Naoaki Kabasawa, Soon-wook Cha, Sang- woo Park, Ju- man Song, Kyung- seok Jeon
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Publication number: 20180275546Abstract: [Object] The purpose of the present invention is to provide a charge control agent for polymerized toners and particularly for color toners, which has a large charge amount and environmentally stable charging characteristics. [Solving Means] Since a charge control agent including a pyrazolone derivative represented by a general formula (1) or a salt of the derivative as an active ingredient has a large charge amount and excellent environmental stability of charging, it has an excellent charge-imparting effect for use in polymerized toners and particularly in color toners. (in the formula, R1, R2, and R3 each independently represent a substituted or unsubstituted C1 to C20 linear or branched alkyl group, a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted condensed polycyclic aromatic group.Type: ApplicationFiled: September 8, 2016Publication date: September 27, 2018Applicant: Hodogaya Chemical Co., Ltd.Inventors: JUN WATANABE, MASAYA TOJO, HIDEYUKI OTSUKA
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Patent number: 10059725Abstract: The invention provides a light emitting layer host compound and an electron-blocking compound that have high excited triplet levels, and can completely confine the triplet excitons of phosphorescent material, for use as the material of a high-efficient organic electroluminescent device. The invention also provides a high-efficient, high-luminance organic electroluminescent device with the use of the compounds. The compound of the general formula (1) below has a triphenylsilyl group and a triarylamine structure, and the organic electroluminescent device includes a pair of electrodes and at least one organic layer interposed between the pair of electrodes, wherein the compound of the general formula (1) having a triphenylsilyl group and a triarylamine structure is used as constituent material of the at least one organic layer.Type: GrantFiled: November 9, 2009Date of Patent: August 28, 2018Assignees: Hodogaya Chemical Co., Ltd., Shinshu UniversityInventors: Norimasa Yokoyama, Shuichi Hayashi, Yoshio Taniguchi, Musubu Ichikawa, Shinichi Matsuki
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Publication number: 20180212153Abstract: According to the present invention, there is provided an organic electroluminescent device which has an anode, a hole transport layer, a luminous layer, an electron transport layer, and a cathode arranged in order of description. The device is characterized in that: the hole transport layer includes a specific arylamine compound, and that the luminous layer includes a specific indenoindole derivative or a specific carbazole derivative. The organic EL device of the present invention has improved efficiency of hole transport from the hole transport layer to the luminous layer and also improved efficiency of electron transport from the electron transport layer to the luminous layer, in comparison to conventional organic EL devices.Type: ApplicationFiled: July 27, 2015Publication date: July 26, 2018Applicants: HODOGAYA CHEMICAL CO., LTD., SFC CO., LTD.Inventors: Shuichi HAYASHI, Naoaki KABASAWA, Shunji MOCHIDUKI, Se-Jin LEE, Oun-gyu LEE, Bong-Ki SHIN
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Patent number: 10026903Abstract: An organic compound having an excellent electron injection and transport performance is provided as a material for a low-power-consumption organic electroluminescent device. A low-power-consumption organic electroluminescent device is also provided by using the compound. The compound is a compound of general formula (1) or (2) having a substituted bipyridyl and triphenylene ring structure. The organic electroluminescent device includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes, and uses the compound as constituent material of at least one of the organic layers.Type: GrantFiled: May 24, 2017Date of Patent: July 17, 2018Assignees: Hodogaya Chemical Co., Ltd., Kyushu University, National University CorporationInventors: Chihaya Adachi, Kazunori Togashi, Norimasa Yokoyama, Shintaro Nomura
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Publication number: 20180175301Abstract: The present invention provides an arylamine compound represented by the general formula (1) shown below. The arylamine compound of the present invention is a novel compound and, compared with conventional hole transport materials, has high hole mobility, has excellent electron blocking capability, is stable in a thin film state, and is excellent in heat resistance.Type: ApplicationFiled: June 7, 2016Publication date: June 21, 2018Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Hiroshi OOKUMA, Makoto NAGAOKA, Kazuyuki SURUGA
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Patent number: 9985216Abstract: According to the present invention, there are provided an indenoindole derivative represented by the following general formula (1); and an organic electroluminescent element including a pair of electrodes and at least one organic layer sandwiched therebetween, wherein the above compound is used as a constituent material for the at least one organic layer. The indenoindole derivative of the present invention provides an organic compound, which is excellent in hole injection/transport performance, has electron blocking capability, is highly stable in a thin film state, and excels in heat resistance, as a material for a high efficiency, high durability organic electroluminescent element. An organic electroluminescent element formed using this compound is highly efficient and highly durable.Type: GrantFiled: June 4, 2014Date of Patent: May 29, 2018Assignee: HODOGAYA CHEMICAL CO., LTD.Inventors: Makoto Nagaoka, Shigetaka Numazawa, Norimasa Yokoyama, Si In Kim, Shigeru Kusano
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Patent number: 9905775Abstract: The present invention provides an organic electroluminescent device having at least an anode, a hole transport layer, a luminous layer, an electron transport layer, and a cathode in this order, wherein the hole transport layer contains an arylamine compound having a specific structure, and the luminous layer contains an indenoindole derivative or a carbazole derivative having a specific structure. The organic EL device of the present invention is an organic EL device improved in luminous efficiency, driving voltage and durability.Type: GrantFiled: January 5, 2016Date of Patent: February 27, 2018Assignees: HODOGAYA CHEMICAL CO., LTD., SFC CO., LTDInventors: Shuichi Hayashi, Naoaki Kabasawa, Shunji Mochiduki, Se-Jin Lee, Oun-gyu Lee, Bong-Ki Shin
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Patent number: 9905770Abstract: An organic compound having a substituted acridan ring structure with characteristics excelling in hole-injecting/transporting performance and having an electron blocking ability, a highly stable thin-film state, and excellent heat resistance is provided as a material for an organic electroluminescent device of high efficiency and high durability, and the organic electroluminescent device of high efficiency and high durability is provided using this compound. The compound is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes and one or more organic layers sandwiched between the pair of electrodes.Type: GrantFiled: April 24, 2012Date of Patent: February 27, 2018Assignee: Hodogaya Chemical Co., Ltd.Inventors: Norimasa Yokoyama, Makoto Nagaoka, Naoaki Kabasawa, Eiji Takahashi
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Patent number: 9882136Abstract: An organic electroluminescent device having a capping layer composed of material having a high refractive index that involves only small differences in refractive indices measured in the blue, green, and red wavelength regions, excelling in thin film stability and durability and having no absorption in the respective wavelength ranges of blue, green, and red is provided to improve device characteristics of the organic electroluminescent device, particularly to greatly improve the coupling-out efficiency.Type: GrantFiled: March 14, 2013Date of Patent: January 30, 2018Assignee: Hodogaya Chemical Co., Ltd.Inventors: Makoto Nagaoka, Shuichi Hayashi, Motonori Tsuji, Yoshikazu Aoki
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Publication number: 20180026198Abstract: The organic EL device of the present invention has an anode, a hole transport layer, a luminous layer, an electron transport layer, and a cathode in the order of description. The hole transport layer includes an arylamine compound represented by the following general formula (1): in the formula, Ar1 to Ar4 each represent a monovalent aromatic hydrocarbon group or a monovalent aromatic heterocyclic group, and the luminous layer includes an N-aromatic substituted nitrogen-containing heterocyclic compound.Type: ApplicationFiled: January 5, 2016Publication date: January 25, 2018Applicants: HODOGAYA CHEMICAL CO., LTD., SFC CO., LTD.Inventors: Norimasa YOKOYAMA, Shuichi HAYASHI, Takeshi YAMAMOTO, Naoaki KABASAWA, Daizo KANDA, Shunji MOCHIDUKI, Se-Jin LEE, Oun-gyu LEE, Bong-Ki SHIN
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Patent number: 9871210Abstract: Naphthotriazole derivatives represented by the following general formula (1), wherein, Ar1 is an aromatic hydrocarbon group or an aromatic heterocyclic group, and A is a group that contains an aromatic heterocyclic group. The compound features excellent electron injection/transporting capability, a high hole-blocking power and a high stability in the form of a thin film, and can be used as a material for producing highly efficient and highly durable organic electroluminescent devices.Type: GrantFiled: February 20, 2014Date of Patent: January 16, 2018Assignee: HODOGAYA CHEMICAL CO., LTD.Inventors: Makoto Nagaoka, Shigetaka Numazawa, Mari Toriya, Shingo Ozawa, Shigeru Kusano