Abstract: An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: a host material represented by the following formula (1); and at least one phosphorescent material. Ra—Ar1—Ar2—Ar3—Rb ??(1) In the formula (1), Ra, Rb, Ar1, Ar2 and Ar3 each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon ring selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzo[b]fluoranthene ring, a benzochrysene ring and a picene ring.

Abstract: A fluorene-based derivative having a specific 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 sandwiched between a cathode and an anode, wherein at least one layer of the organic thin film layers described above comprises the above fluorene-based derivative having a specific structure in the form of a single component or a mixed component. The organic electroluminescence device has a high luminous efficiency, and the fluorene-based derivative materializes the same.

Abstract: An organic electroluminescent material-containing solution contains an organic electroluminescent material and a solvent. The organic electroluminescent material contains a host and a dopant the host contains an organic electroluminescence-functional portion A formed of a low-molecular organic electroluminescent material and a soluble portion B bonded to the organic electroluminescence-functional portion A for solubilizing the low-molecular organic electroluminescent material in the solvent, the host being represented by a formula of A-B-E (where E represents a terminal group). The portion A is a low-molecular organic electroluminescent material having a central anthracene skeleton. The portion B is formed by bonding structures represented by the following formula (3) with structure(s) represented by the following formula (4). Units represented by the formula (3) include bonds in ortho positions or meta positions while unit(s) represented by the formula (4) includes bonds in para positions.

Abstract: A benzothiophene derivative that having novel structure and an electroluminescence device which comprises a cathode, an anode and an organic thin film layer which comprises at least one layer comprising at least a light emitting layer and is disposed between the cathode and the anode, wherein at least one layer in the organic thin film layer comprises the benzothiophene derivative described in claim 1 singly or as a component of a mixture. An electroluminescence device emitting blue light, exhibiting a great efficiency of light emission and having a long life can be obtained by using the derivative.

Abstract: Provided are a pyrene derivative of a specified structure and an organic electroluminescence device including an organic thin film layer formed of one or multiple layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the pyrene derivative alone or as a component of mixture. Thus, there are provided an organic electroluminescence device capable of obtaining long-life blue light emission with high luminous efficiency and a novel pyrene derivative for realization thereof.

Abstract: An organic electroluminescent material-containing solution contains an organic electroluminescent material and a solvent. The organic electroluminescent material contains a host and a dopant. The host includes: an organic electroluminescence-functional portion formed of a low-molecular organic electroluminescent material; and a soluble portion bonded to the organic electroluminescence-functional portion so as to solubilize the low-molecular organic electroluminescent material in the solvent. The soluble portion is a molecular chain formed by polymerizing basic units and the host is an oligomer.

Abstract: An organic EL material-containing solution contains an organic EL material, a solvent and a viscosity control agent. The organic EL material contains a host and a dopant. The host is a compound shown by Formula (1) below and has a solubility of 2 wt % or higher in the solvent. The solvent is an aromatic solvent, while the viscosity control agent is an alcohol type solution or an alkyl-substituted aromatic solution having 4 or more carbon atoms.

Abstract: An organic EL material-containing solution contains an organic EL material and a solvent. The organic EL material contains a host and a dopant, the host being a naphthacene compound having a solubility in the solvent of 0.5 wt % or higher. The solvent is selected from the group consisting of an aromatic solvent, a halogen type solvent and an ether type solvent.

Abstract: A polycarbonate prepolymer for solid state polymerization, which is produced by an oxidative carbonylation reaction of an aromatic dihydroxy compound, a monohydric phenol having a boiling point of 330° C. or below, carbon monoxide and oxygen, the polycarbonate prepolymer being characterized by that (a) a ratio of aryl carbonate groups and hydroxyl groups each constituting terminal groups of the prepolymer is from 2:8 to 8:2, and (b) a molecular weight distribution (Mw/Mn) is from 1.1 to 2.1; and a process of producing polycarbonates including a step of solid state-polymerizing the prepolymer so as to increase the molecular weight thereof. According to the present invention, the prepolymer having a controlled molecular weight distribution suitable for solid state polymerization is provided, and a high quality polycarbonate is efficiently produced in environmentally friend manner.

Abstract: An organic electroluminescent device including an anode (1), a first emitting layer (3), a carrier barrier layer (4), a second emitting layer (5), and a cathode (7) stacked in that order; the first emitting layer (3) including a host material of a compound represented by X—(Y)n, and a dopant material of a compound containing a fluoranthene skeleton or a perylene skeleton; the affinity level of the carrier barrier layer (4) being smaller than the affinity level of the second emitting layer (5) in an amount of 0.2 eV or more; and the ionization potential (Ie1) of the carrier barrier layer (4) and the ionization potential (Ih1) of the first emitting layer (3) satisfying Ie1<Ih1+0.1 (eV).

Abstract: Disclosed are a novel polycyclic aromatic compound having a specific structure and a material for forming a luminescent coating film which is composed of an organic solvent solution containing such a polycyclic aromatic compound. Also disclosed is an organic electroluminescent (EL) device wherein an organic thin film layer composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode. Such an organic EL device has high luminous efficiency and long life, since the polycyclicaromatic compound is contained, by itself or as a component of a mixture, in at least one layer of the organic thin film layer of the organic EL device.

Abstract: Provided is an organic electroluminescence device having high luminous efficiency, high heat resistance and an extremely long lifetime. The organic electroluminescence device of the present invention includes an organic thin film layer composed of one or more layers containing at least a light emitting layer is interposed between a cathode and an anode. The light emitting layer includes a compound containing a condensed ring and a luminescent metal complex capable of emitting light having a red-based color. It is preferable that the compound containing a condensed ring includes a host material, while the luminescent metal complex capable of emitting light having a red-based color includes a phosphorescent dopant.

Abstract: An organic EL device which can easily control colors to obtain white light emission, and has a high efficiency. An organic electroluminescent device 10 including; at least an anode 1, an organic emitting layer and a cathode 6 stacked in this order; at least a first emitting layer 3 including a fluorescent dopant and a second emitting layer 4 comprising a phosphorescent dopant being stacked in the organic emitting layer.

Abstract: An organic electroluminescent device including: a cathode, an anode, and an organic thin film layer provided between the cathode and the anode, the organic thin layer including one or plural layers including an emitting layer; at least one layer of the organic thin film layer including an indenoperylene compound having at least one substituent on the central perylene ring, and a compound having a condensed aromatic ring with 10 to 50 nucleus carbon atoms.

Abstract: Provided is a material for an organic electroluminescence (EL) device having high luminous efficiency, high thermostability, and a long lifetime, and an organic EL device utilizing the same. The material for an organic EL device is composed of a compound of a specified structure having a nitrogenous ring. The organic EL device has an organic thin film layer composed 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. In the organic EL device, at least one layer of the organic thin film layer contains the material for an organic EL device.

Abstract: A material for organic electroluminescence device with specific structure having poor symmetry. An an organic electroluminescence device comprising a cathode, an anode and an organic thin film layer which is sandwiched between the cathode and the anode and comprises at least one layer, wherein at least one layer in the organic thin film layer contains a material for the organic electroluminescence device described above. An organic electroluminescence device with excellent efficiency of light emission, without pixel defects and which is superior in heat resistance is obtained.

Abstract: A biphenyl derivative having a specific structure and an organic electroluminescent device having a long lifetime due to comprising at least one of organic thin film layers including a light emitting layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer contains the biphenyl derivatives, singly or as a component of a mixture are provided, and also the biphenyl derivatives particularly suitable for a light emitting material of the organic EL device of the present invention is provided.

Abstract: A coordination metal compound comprising cordinating at least one ligand having a Spiro bond to at least a metal atom; a material for an organic electroluminescence (EL) device, and an organic EL device comprising at least one organic thin film layer sandwiched between a pair of electrodes consisting of an anode and a cathode, wherein at least one organic thin film layer thereof comprises the coordination metal compound or the material for an organic EL device, and a material for luminescence coating formation comprising an organic solvent solution containing the coordination metal compound or the material for the organic EL device is provided.

Abstract: A fluorene-based derivative having a specific 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 sandwiched between a cathode and an anode, wherein at least one layer of the organic thin film layers described above comprises the above fluorene-based derivative having a specific structure in the form of a single component or a mixed component. The organic electroluminescence device has a high luminous efficiency, and the fluorene-based derivative materializes the same.

Abstract: An organic electro-luminescent device exhibiting an excellent heat resistance, a long serving life and a great efficiency of light emission and producing a light emission ranging from a blue light to a red light. The organic electroluminescent device comprising one or more thin-film layers which contain at least a light emitting layer and are interposed between a cathode and an anode, wherein the light emitting layer contains an amine compound represented by any of the following general formula (A) and a fluorene-based compound represented by any of the following general formula (B).