3134 results about "Carbazole" patented technology

An aromatic amine derivative with a specific structure having a carbazole skeleton to which a diarylamino group bonds via a bonding group. An organic electroluminescence device which is composed of one or more organic thin film layers including at least one light emitting layer sandwiched between a cathode and an anode, wherein at least one of the organic thin film layers contains the aromatic amine derivative singly or as its mixture component. Organic electroluminescence devices with enhanced efficiency of light emission and a compound realizing the devices are provided.

A phenylcarbazole-based compound is represented by Formula 1, and has superior electric properties and charge transport abilities, and thus is useful as a hole injection material, a hole transport material, and / or an emitting material which is suitable for fluorescent and phosphorescent devices of all colors, including red, green, blue, and white colors. The phenylcarbazole-based compound is synthesized by reacting carbazole with diamine. The organic electroluminescent device manufactured using the phenylcarbazole-based compound has high efficiency, low voltage, high luminance, and a long lifespan.

Provided are an organic electroluminescence device that not only provides high efficiency but also has a long lifetime, and an aromatic amine derivative that realizes the device. The organic electroluminescence device includes an aromatic amine derivative, including at least one substituent A having dibenzofuran and at least one substituent B selected from groups each having dibenzofuran or carbazole, in a molecule thereof, in which the substituent A and the substituent B include groups different from each other, and the substituent A and the substituent B are bonded to the same nitrogen atom, or different nitrogen atoms, in the molecule. The molecules of the aromatic amine derivative hardly crystallize, which improves a yield in the production of the organic electroluminescence device. In the organic electroluminescence device, including an organic thin film layer formed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, the aromatic amine derivative is contained in at least one layer, particularly a hole transport layer, in the organic thin film layer.

A high-efficiency, high-durability organic electroluminescent device, particularly a phosphorescent organic electroluminescent device is provided by using an organic compound of excellent characteristics that exhibits excellent hole-injecting / transporting performance and has high triplet exciton confining capability with an electron blocking ability, and that has high stability in the thin-film state and high luminous efficiency.The organic electroluminescent device includes a pair of electrodes, and a plurality of organic layers sandwiched between the pair of electrodes and including a phosphorescent light-emitting material-containing light emitting layer and a hole transport layer, wherein a compound of the following general formula (1) having a carbazole ring structure is used as a constituent material of the hole transport layer.

The invention discloses an organic electroluminescent material containing a tertiary aromatic amine structure. The organic electroluminescent material containing the tertiary aromatic amine structure is characterized in that: the structural formula is shown in the specifications; and in the structural formula, n1, n2 and n3 independently represent that the quantity of benzene ring is 0 or 1 respectively; a radical A represents a substituted carbazole radical; a radical B represents a structural radical containing substituted fluorenyl; and a structure C is a structure radical containing phenyl and substituted phenyl. The organic electroluminescent material is a fluorescent material which has high luminous efficiency; a result of the luminous efficiency in a solution can further indicate that the organic electroluminescent material which has high luminous efficiency and of which the brightness and performance can meet the industrial development can be applied to electroluminescent devices by serving as a luminous material or a luminous main body material or a transmission material. A synthesizing process has the advantages of reaction in two simple steps, easiness and convenience for operating, easiness for purifying, great increase in the industrial synthesizing yield, great reduction in cost, wide application, applicability to a plurality of materials for devices, and wide prospect. Meanwhile, a substituted radical is adjusted, so that the performance of the material further meets requirement of industrialization.

A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.

Fluorescence-emitting material which improves luminous efficiency of an organic light-emitting element such as an organic EL element or an organic PL element and an organic light-emitting element using the fluorescence-emitting material. The fluorescence-emitting material includes a compound having an indolocarbazole skeleton represented by the following general formula (1), as defined in the specification.The organic light-emitting element includes an organic EL element including: a substrate; an anode; a cathode; and a light-emitting layer, the anode and the cathode being laminated on the substrate and the light-emitting layer being sandwiched between the anode and the cathode, in which the light-emitting layer includes: the organic light-emitting material; and as a host material, an organic compound having excited triplet energy higher than that of the organic light-emitting material.

Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula.

The invention relates to the photoinitiator technical field, in particular to an oxime ester photoinitiator and a preparation method thereof. A carbazole oxime ester photoinitiator has a structural general formula as the right formula, R=formula (1), n=0-5, m=3 or 4, R radical is aliphatic ketone with cyclane, the cyclane is cycloaliphatic ring from cyclopropane to cyclooctane, branched-chain aliphatic hydrocarbon connects the cyclane and the ketone, and the chain usually has 0-6 carbon atoms. The carbazole oxime ester photoinitiator with the structure is a brand-new compound with good photoinitiator performance, and solves the problem of poor sensitivity, thermal stability and solubility of the existing carbazole oxime ester photoinitiators.

A material for electroluminescent devices which comprises a compound in which a heterocyclic group having nitrogen is bonded to carbazolyl group and an organic electroluminescent device having at least one organic thin film layer which is sandwiched between the cathode and the anode and contains the above material in at least one layer, are provided. The material can provide organic electroluminescent devices emitting bluish light with a high purity of color. The organic electroluminescence device uses the material.

A phenylcarbazole-based compound is represented by Formula 1, and has superior electric properties and charge transport abilities, and thus is useful as a hole injection material, a hole transport material, and / or an emitting material which is suitable for fluorescent and phosphorescent devices of all colors, including red, green, blue, and white colors. The phenylcarbazole-based compound is synthesized by reacting carbazole with diamine. The organic electroluminescent device manufactured using the phenylcarbazole-based compound has high efficiency, low voltage, high luminance, and a long lifespan.

A phenylcarbazole compound of formula (1) below is provided, where each of R1 and R2 is independently a monosubstituted or polysubstituted functional group selected from the group consisting of hydrogen atom, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C4-C30 heterocyclic group, a substituted or unsubstituted C6-C30 condensed polycyclic group, wherein groups adjacent to R1 and R2 bind and form a saturated or unsaturated cyclic hydrocarbon group, and Ar is a substituted or unsubstituted C6-C30 aryl group or a C6-C30 heteroaryl group, wherein the substituent R4 is defined herein. Also included is an organic electroluminescence device comprising the above phenylcarbazole compounds.

The invention relates to a ketoxime ester photoinitiator, in particular to a ketoxime ester photoinitiator for a photo-curing material. The ketoxime ester photoinitiator has a chemical structural formula as the right, wherein in a R1 structure, n is an integer of between 0 and 5; m is an integer of between 1 and 6; R2 is methyl, phenyl, substituted phenyl, benzyl or substituted benzyl; and R3 is diphenyl sulfide group, substituted diphenyl sulfide group, carbazole group or substituted carbazole group. The ketoxime ester photoinitiator solves the problems of poor application performance and poor thermal stability of the prior OXE-1 ketoxime ester photoinitiator.

Disclosed is a novel benzoxazole derivative which has high excitation energy, particularly high triplet excitation energy, and is a bipolar substance. A benzoxazole derivative represented by the following General Formula (G1) is provided.In the formula, R1 and R2 independently represent a hydrogen atom, an alkyl group with 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group with 6 to 13 carbon atoms, substituents of the substituted aryl group may be bonded to form a ring which may form a spiro ring structure, R11 to R14 independently represent a hydrogen atom, a halogen, an alkyl group with 1 to 4 carbon atoms, or an unsubstituted aryl group with 6 to 10 carbon atoms, a bond formed between any two of α, β, and γ forms a carbazole skeleton, and n is 0 to 3.

It is an object of the present invention to provide a novel material capable of realizing excellent color purity of blue, and a light emitting element and a light emitting device using the novel material. Further, it is an object of the present invention to provide which is highly reliable, and a light emitting element and a light emitting device using the novel material. The structure for solving the above problems in accordance with the present invention is an anthracene derivative simultaneously having a diphenylanthracene structure and a carbazole skeleton in a molecule as represented by structural formula (1):

The present invention relates to a material for an organic electroluminescent device, including a phenanthrocarbazole-based compound having a specific structure, and an organic electroluminescent device including the same. More specifically, the phenanthrocarbazole-based compound is applied as a material for a phosphorescent and fluorescent organic electroluminescent device, thereby providing an organic light emitting device with improved light emitting efficiency, luminance, thermal stability, driving voltage, lifetime and the like.

The present invention provides a material for an organic electroluminescence device having a specific structure in which a dibennzofuranyl group or a dibenzothiophenyl group is bonded at an N-position (9-position) of a carbazolyl group and an organic electroluminescence device which is provided with one or more organic thin film layers including a light emitting layer between a cathode and an anode and in which at least one layer of the organic thin film layers described above contains the material for an organic electroluminescence device according to the present invention.

A metal complex which has a metal complex structure showing light emission from triplet excited state, and has a monovalent group derived from carbazole, and a light-emitting device using said metal complex.

Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully assured of driving stability, and simple in constitution. The organic electroluminescent device comprises a hole-transporting layer, a light-emitting layer, and an electron-transporting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and an indolocarbazole compound of specific structure. Examples of the indolocarbazole compound are N,N′-diphenylindolocarbazole and bis(N-phenylindolo)carbazole.

Provided is a novel heterocyclic compound which can be used for a light-emitting element, as a host material of a light-emitting layer in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, A represents any of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group, R11 to R19 separately represent any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 14 carbon atoms, and Ar represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms.

An organic electroluminescence device which has on a substrate a pair of electrodes and a light emitting layer sandwiched between the electrodes, characterized by containing in the light emitting layer a compound represented by the following formula (1) and a particular indium complex;(Cz)p-L-(A)q  (1)wherein Cz represents a substituted or unsubstituted arylcarbazolyl group or a substituted or unsubstituted carbazolylaryl group, L represents a single bond, a substituted or unsubstituted arylene group, a substituted or unsubstituted cycloalkylene group, or a group derived from a substituted or unsubstituted heteroaromatic ring, A represents a group derived from a substituted or unsubstituted nitrogen-containing heteroaromatic 6-membered ring, and each of p and q independently represents an integer from 1 to 6.

There are provided an organic having both excellent hole transporting property and satisfactory electron transporting and showing excellent durability against electric oxidation / reduction and a high triplet excitation level, and a charge transporting material and an organic electroluminescent device each using the organic compound. The organic compound is represented by following Formula (I):wherein Cz1 and Cz2 each represent a carbazolyl group; Z represents a direct bond or an arbitrary linkage group enabling the conjugation of nitrogen atoms in the carbazole rings of Cz1 and Cz2 with each other; and Q represents a direct bond connecting to “G” in following Formula (II):wherein Ring B1 represents a six-membered aromatic heterocyclic ring having “n” nitrogen atom(s) as hetero atom(s); “n” represents an integer of from 1 to 3; G represents a direct bond or an arbitrary linkage group connecting to Q when G connects to Q; Gs connect to carbon atoms at the ortho-position and the para-position with respect to nitrogen atom(s) in Ring B1; G represents an aromatic hydrocarbon group when G does not connect to Q; and “m” represents an integer of from 3 to 5.

An organic EL multi-color emitting device including a substrate, and a first light-emitting element and a second light-emitting element arranged on the surface of the substrate; the first light-emitting element including, between an anode and a cathode, a first organic layer, a second organic layer and a third organic layer in this sequence in a direction perpendicular to the surface of the substrate; the second light-emitting element including, between an anode and a cathode, a second organic layer and a third organic layer in this sequence in a direction perpendicular to the surface of the substrate; the first organic layer including a first light-emitting dopant; the third organic layer including a second light-emitting dopant; the second organic layer including any of (A) a compound including an arylamine site, and a furan site or a thiophene site, (B) a compound including an arylamine site and a site comprising a nitrogen-containing six-membered ring structure, (C) a compound including a carbazole site, and a furan site or a thiophene site, and (D) a compound including a carbazole site and a site including a nitrogen-containing six-membered ring structure.