Tsukuba, Japan
Tsukuba, Japan

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Patent
Hodogaya Chemical Co. | Date: 2017-02-22

An organic electroluminescent device comprises, between an anode and a cathode, a hole injection layer, a hole-transporting layer, a luminous layer and an electron-transporting layer, wherein the hole injection layer contains an arylamine compound () having three or more triphenylamine skeletons, the hole-transporting layer contains an arylamine compound () having two triphenylamine skeletons, and the electron-transporting layer contains an electron-transporting compound having an anthracene ring skeleton and a pyridoindole ring skeleton. The organic EL device emits light highly efficiently, drives on a low voltage, and features excellent durability and long life.


An organic compound 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 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 of a general formula (Chemical Formula 1) has an acridan ring structure, wherein Ar_(1) is substituted or unsubstituted 9,9-dimethylfluorenyl and Ar_(2) is a substituted or unsubstituted condensed polycyclic aromatic group, and 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.


Patent
Hodogaya Chemical Co. | Date: 2016-05-18

[Object] An organic electroluminescent device having high efficiency, low driving voltage and a long lifetime is provided by combining various materials for an organic electroluminescent 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. [Means of Realizing the Object] 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 second hole transport layer includes an arylamine compound represented by the following general formula (1).


Patent
Hodogaya Chemical Co. | Date: 2016-04-13

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 anorganic 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. Anorganic electroluminescent element formed using this compound is highly efficient and highly durable.


The present invention relates to a colorant for hair dyeing containing a compound represented by the following general formula (I), a composition for hair dyeing containing the same, and a hair dyeing method:_(1), R_(2) and R_(3) each independently represent a hydrogen atom, a linear or branched alkyl group having from 1 to 6 carbon atoms, or a linear or branched alkoxy group having from 1 to 6 carbon atoms, and An- represents an inorganic anion or an organic anion).


Patent
Hodogaya Chemical Co. | Date: 2016-01-06

Naphthotriazole derivatives represented by the following general formula (1),^(1) 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.


Patent
Hodogaya Chemical Co. | Date: 2016-04-20

Dicarbazole derivatives represented by the following general formula (1),^(1) and Ar^(2) are aromatic hydrocarbon groups or aromatic heterocyclic groups, R^(1) to R^(12) are hydrogen atoms, deuterium atoms, fluorine atoms, chlorine atoms, cyano groups, nitro groups, alkyl groups having 1 to 6 carbon atoms, cycloalkyl groups having 5 to 10 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, alkyloxy groups having 1 to 6 carbon atoms, cycloalkyloxy groups having 5 to 10 carbon atoms, aromatic hydrocarbon groups, aromatic heterocyclic groups, aryloxy groups or disubstituted amino groups having aromatic hydrocarbon groups or aromatic heterocyclic groups as substituents bonded to the nitrogen atom.


Patent
Hodogaya Chemical Co. | Date: 2016-06-08

A Benzotriazole derivative represented by the following general formula (1),Ar^(1) is a monovalent aromatic hydrocarbon group or aromatic heterocyclic group,Ar^(2) is a hydrogen atom, a deuterium atom, or a monovalent aromatic hydrocarbon group or aromatic heterocyclic group,A is a divalent aromatic hydrocarbon group or aromatic heterocyclic group,B is a divalent condensed polycyclic aromatic hydrocarbon group or a single bond, andC is a monovalent aromatic heterocyclic group, and wherein if A is a phenylene group, B is a divalent condensed polycyclic aromatic hydrocarbon group or C is a monovalent aromatic heterocyclic group other than a pyridyl group.


A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The spiro compound of a general formula (1) having an azafluorene ring structure is used as a constituent material of at least one organic layer in an organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes.


Patent
Hodogaya Chemical Co. | Date: 2015-02-12

According to the present invention, there are provided a benzofuroindole derivative represented by the following general formula (1); and an organic EL device comprising a pair of electrodes and at least one organic layer sandwiched therebetween, wherein the above derivative is used as a constituent material for the at least one organic layer. The benzofuroindole derivative of the present invention is useful as a constituent material for a hole injection layer, a hole transport layer, an electron blocking layer or a luminous layer of an organic EL device. It has excellent electron blocking capability, is stable in a thin film state, and excels in heat resistance. Thus, the organic EL device of the present invention, prepared using such a benzofuroindole derivative, is high in luminous efficiency and power efficiency, thereby lowering the practical driving voltage of the device. The device can also lower light emission starting voltage, and improve durability.

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