Abstract: An aromatic amine derivative having a specific structure. An organic electroluminescence device which is composed of one or more organic thin film layers sandwiched between a cathode and an anode, wherein at least one of the organic thin film layers, especially a hole transporting layer, contains the aromatic amine derivative. The aromatic amine derivative has at least one substituted or unsubstituted dibenzofuran skeleton and at least one substituted or unsubstituted terphenylene skeleton. Because the molecules in the aromatic amine derivate hardly crystallize, organic electroluminescence devices improving their production yield and having prolonged lifetime are provided.

Abstract: Provided are a novel aromatic amine derivative having an asymmetric structure and an organic electroluminescence device in which, an organic thin film layer comprising a single layer or plural layers including at least a light emitting layer is interposed between a cathode and an anode, at least one layer in the above organic thin film layer contains the aromatic amine derivative described above in the form of a single component or a mixed component, whereby molecules are less liable to be crystallized; a yield in producing the organic electroluminescence device is enhanced; and a lifetime is extended.

Abstract: A biscarbazole derivative represented by formula (1): wherein A1, A2, L1, L2, R1 to R4, and a to d are as defined in the specification, is useful as a material for forming organic EL devices and the organic EL devices including the derivative is capable of driving at a low voltage and has a long lifetime.

Abstract: Provided are a novel aromatic amine derivative having a specific structure and an organic electroluminescence device in which an organic thin layer comprising a single layer or plural layers including a light emitting layer is interposed between a cathode and an anode, wherein at leas one layer of the above organic thin layer contains the aromatic amine derivative described above in the form of a single component or a mixed component. Thus, the organic electroluminescence device is less liable to be crystallized in molecules, improved in a yield in producing the organic electroluminescence device and extended in a lifetime.

Abstract: A material for an organic electroluminescence device represented by the following formula (I): wherein X1 to X8 are a nitrogen atom, CH, CHal or CRa; Az is a nitrogen-containing six-membered ring or a fused polycyclic group including a nitrogen-containing six-membered ring; W is an aromatic hydrocarbon group having 6 to 30 ring carbon atoms which is substituted by at least one cyano group or a heterocyclic group having 5 to 30 ring atoms which is substituted by at least one cyano group.

Abstract: 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.

Abstract: An organic electroluminescence device 1 includes: an anode 3, a cathode 4 opposed to the anode 3 and an emitting layer 5 provided between the anode 3 and the cathode 4. The emitting layer 5 contains first and second host materials and a luminescent material. The first host material has a partial structure represented by at least one of the following formulae (1) and (2) while the second host material has a partial structure represented by the following formula (3). Az represents a substituted or unsubstituted aromatic heterocyclic group containing a nitrogen-containing six-membered ring. WCN is an aromatic hydrocarbon group substituted by at least one cyano group (CN) or an aromatic heterocyclic group substituted by at least one cyano group (CN). Ar1 is a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted aromatic heterocyclic group, but is not an aromatic heterocyclic group containing a nitrogen-containing six-membered ring.

Abstract: To provide an organic EL element material that is capable of enhancing the light emission efficiency and the lifetime of the element as compared to an ordinary organic EL element material, and an organic EL element using the same. Specifically, to provide an aromatic amine derivative represented by Ar1Ar2Ar3N, and an organic EL element using the same. Representative compounds include the following.

Abstract: A polymer compound including a repeating unit shown by the following formula (1) wherein at least one of Ar1, Ar2 and Ar3 in the formula (1) is a group shown by the formula (2) and the two bonds shown in the formula (1) are present on any one or any two of Ar1, Ar2, Ar3 and L1.

Abstract: A material for organic EL device which includes a compound having a specific structure: an azine ring having a cyano-substituted aromatic hydrocarbon group, an azine ring having a cyano-substituted heterocyclic group, or an azine ring having a cyano group directly bonded to the azine ring. An organic electroluminescence device including an organic thin film layer between a cathode and an anode, wherein the organic thin film layer includes a light emitting layer and at least one layer containing the material for organic electroluminescence device, has a long lifetime.

Abstract: 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.

Abstract: A process for producing an amine compound, by reacting a halogenated aryl compound with an amine intermediate of formula (1): wherein: Ar1 is a substituted or unsubstituted aryl group comprising 6 to 50 ring atoms; and R1 and R2 are each independently an alkyl group comprising 1 to 50 carbon atoms, which may together form a cyclic structure.

Abstract: Disclosed is an organic electroluminescence device in which an organic thin film which is composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode. Since at least one layer of the organic thin film contains a novel aromatic amine derivative, which has an asymmetric structure wherein two different amine units are bonded through a linking group, by itself or as a component of a mixture, molecules are hardly crystallized, thereby improving the production yield of the organic electroluminescence device. This organic electroluminescence device has a long life.

Abstract: An organic electroluminescence device includes an anode, a cathode, and an organic thin-film layer interposed between the anode and the cathode. The organic thin-film layer includes a phosphorescent-emitting layer containing a host and a phosphorescent dopant, and an electron transporting layer that is provided closer to the cathode than the phosphorescent-emitting layer. The host contains a substituted or unsubstituted polycyclic fused aromatic skeleton.

Abstract: Provided are a novel aromatic amine derivative having a specific structure and an organic electroluminescence device in which an organic thin layer comprising a single layer or plural layers including a light emitting layer is interposed between a cathode and an anode, wherein at leas one layer of the above organic thin layer contains the aromatic amine derivative described above in the form of a single component or a mixed component. Thus, the organic electroluminescence device is less liable to be crystallized in molecules, improved in a yield in producing the organic electroluminescence device and extended in a lifetime.

Abstract: Disclosed is an organic electroluminescence device in which an organic thin film which is composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode. Since at least one layer of the organic thin film contains a novel aromatic amine derivative, which has an asymmetric structure wherein two different amine units are bonded through a linking group, by itself or as a component of a mixture, molecules are hardly crystallized thereby improving the production yield of the organic electroluminescence device. This organic electroluminescence device has a long life.

Abstract: Provided is an organic electroluminescence device that provides high efficiency and a long lifetime. The device includes an aromatic amine including at least one substituent A having dibenzofuran and at least one substituent B selected from groups having dibenzofuran or carbazole. The substituent A and the substituent B include groups different from each other and are bonded to the same or different nitrogen atoms in the molecule. The molecules of the aromatic amine hardly crystallize, improving yield in producing the organic electroluminescence device. The device includes 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 is contained in at least one layer, particularly a hole transport layer, in the organic thin film layer.

Abstract: An aromatic amine derivative having a specific structure. An organic electroluminescence device which is composed of one or more organic thin film layers sandwiched between a cathode and an anode, wherein at least one of the organic thin film layers, especially a hole transporting layer, contains the aromatic amine derivative. The aromatic amine derivative has at least one substituted or unsubstituted dibenzofuran skeleton and at least one substituted or unsubstituted terphenylene skeleton. Because the molecules in the aromatic amine derivate hardly crystallize, organic electroluminescence devices improving their production yield and having prolonged lifetime are provided.

Abstract: Disclosed is an organic electroluminescence device in which an organic thin film which is composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode. Since at least one layer of the organic thin film contains a novel aromatic amine derivative, which has an asymmetric structure wherein two different amine units are bonded through a linking group, by itself or as a component of a mixture, molecules are hardly crystallized, thereby improving the production yield of the organic electroluminescence device. This organic electroluminescence device has a long life.

Abstract: Provided is an organic EL device, including: an anode; a cathode; and an organic thin-film layer provided between the anode and the cathode, in which: the organic thin-film layer has a light emitting layer containing a host material and a light emitting material, and a hole transporting layer; and the hole transporting layer has a first hole transporting layer and a second hole transporting layer in the stated order from the anode; the first hole transporting layer contains a specific amine compound; and the second hole transporting layer contains a specific amine compound; or the hole transporting layer has a layer containing a specific electron acceptable compound. The organic EL device has a reduced driving voltage, high luminous efficiency, and excellent practicality.