Abstract: An organic EL device includes a luminescence layer containing a metal coordination compound represented by the following formula (1): LmML?n, wherein M denotes Ir, Pt, Rh or Pd; L denotes a bidentate ligand; L? denotes a bidentate ligand different from L; m is an integer of 1, 2 or 3; and n is an integer of 0, 1 or 2 with the proviso that the sum of m and n is 2 or 3. The partial structure MLm is represented by formula (2) or formula (3) shown below, and the partial structure ML?n is represented by formula (4) or formula (5) shown below: wherein CyN1, CyN2 and CyN3 independently denote a substituted or unsubstituted cyclic group containing a nitrogen atom connected to M; CyN4 denotes a cyclic group containing 8-quinoline or its derivative having a nitrogen atom connected to M.

Abstract: There are provided an organic light-emitting device having a light output of a high emission efficiency and a high luminance and having high durability and a novel organic compound that enables the device to be attained. An organic compound of a long fluorescence lifetime represented by an organic compound having, in a molecule, at least one partial structure comprising an unsubstituted or substituted indole ring and at least one partial structure comprising an unsubstituted or substituted carbazole ring is used in an organic light-emitting device.

Abstract: There is provided an organic light-emitting element comprising at least one light-emitting layer between a pair of electrodes formed on a substrate and at least two or more light emission center materials included in the light-emitting layer, and that the at least one or more light emission center materials include a phosphorescent light-emitting material, and an excitation lifetime of the light emission center material that emits light having a shortest wavelength is shorter than an excitation lifetime of the other light emission center material, whereby a high-efficiency organic light-emitting element without decreasing a color purity of white light emission can be obtained.

Abstract: A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and a dopant for improving the dispersability thereof. As the dopant, there are employed a light emitting compound and a non-light emitting compound or a current enhancing material. In case of employing the light emitting compound, the composition corresponds to a case of utilizing plural light emitting materials, and, in such case, the light emission wavelengths are preferably mutually closer.

Abstract: A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and a dopant for improving the dispersibility thereof. As the dopant, there are employed a light emitting compound and a non-light emitting compound or a current enhancing material. In case of employing the light emitting compound, the composition corresponds to a case of utilizing plural light emitting materials, and, in such case, the light emission wavelengths are preferably mutually closer. Also, evaporation of the light emitting material and the dopant in the same evaporation boat makes it possible to reduce evaporation temperature, thereby improving the dispersability of the light emitting material.

Abstract: There is provided a polymer compound in which a metal complex is bonded to a main chain of a polymer via a substituent for imparting a given distance therebetween. Specifically, a polymer compound is provided which has a partial structure represented by the general formula (1): It is thus rendered possible to improve the yield of synthesis of the polymer compound and to introduce a desired metal complex in a predetermined amount into the polymer compound. It is thus made possible to realize a white-light emitting material or a light emission of a desired color.

Abstract: A luminescence device having a layer containing a metal coordination compound which has a partial structure MLm of formula (2) below and is preferably entirely represented by formula (3) below: MLmL?n,??(3) wherein M denotes a metal atom of Ir, Pt, Rh or Pd; represent mutually different bidentate ligands; m is 1 or 2 or 3; n is 0 or 1 or 2 with the proviso that m+n=2 or 3; the partial structure MLm is represented by formula (2) below (wherein B is an isoquinolyl group bonded to the metal M with its N and including a position-1 carbon atom bonded to a cyclic group A which includes the C bonded to the metal M), and the partial structure ML?n is represented by formula (4), (5) or (6) shown below. There is provided a luminescence device capable of high-efficiency luminescence and long-term high luminance and adapted to red luminescence.

Abstract: There is provided a polymer compound in which a metal complex is bonded to a main chain of a polymer via a substituent for imparting a given distance therebetween. Specifically, a polymer compound is provided which has a partial structure represented by the general formula (1): It is thus rendered possible to improve the yield of synthesis of the polymer compound and to introduce a desired metal complex in a predetermined amount into the polymer compound. It is thus made possible to realize a white-light emitting material or a light emission of a desired color.

Abstract: A luminescence device having a layer containing a metal coordination compound which has a partial structure. MLm of formula (2) below and is preferably entirely represented by formula (3) below: MLmL?n??(3) wherein M denotes a metal atom of Ir, Pt, Rh or Pd; represent mutually different bidentate ligands; m is 1 or 2 or 3; n is 0 or 1 or 2 with the proviso that m+n=2 or 3; the partial structure MLm is represented by formula (2) below (wherein B is an isoquinolyl group bonded to the metal M with its N and including a position-1 carbon atom bonded to a cyclic group A which includes the C bonded to the metal M), and the partial structure ML?n is represented by formula (4), (5) or (6) shown below. There is provided a luminescence device capable of high-efficiency luminescence and long-term high luminance and adapted to red luminescence.

Abstract: A metal coordination compound having a basic structure represented by formula: MLmL?n (1), wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L? are mutually different bidentate ligands; m is 1, 2 or 3; wherein at least one bidentate ligand has a partial structure formed by condensation via an alkylene group having 2–10 carbon atoms, is provided. In an electroluminescence device composed of one or a plurality of organic films disposed between a cathode and an anode, at least one layer is a luminescence layer which is formed by incorporating luminescence molecules constituting the metal coordination compound having a structure of the formula (1) described above as a guest material in a host material thereby to provide an electroluminescence device producing luminescence at high efficiency and stably keeping a high luminance for a long period.

Abstract: A novel phenanthroline compound is provided which is suitable as a compound for an organic EL device and is represented by the general formula (I): wherein R1, R2, R3, R4, R5, R6, R7, and R8 are each independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or a halogen atom with the proviso that at least one of R1, R2, R3, R4, R5, R6, R7, and R8 is a group represented by the general formula (II): and R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, and R20 are each independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or a halogen atom.

Abstract: A luminescence device comprising a pair of electrodes and an organic compound layer disposed between the electrodes. The layer contains a metal coordination compound represented by the following formula (1): wherein M is Ir, Rh or Pd; n is 2 or 3; and X1 to X8 is, independently, a hydrogen atom or a substituent selected from the group consisting of a halogen atom; a nitro group; a trifluoromethyl group; a trialkylsilyl group having three linear or branched alkyl groups each independently having 1–8 carbon atoms; and a linear or branched alkyl group having 2–20 carbon atoms capable of including one or at least two non-neighboring methylene groups which can be replaced with —O—, —S—, —C(O)—, —C(O)—O—, —O—C(O)—, —CH?CH— or —C?C— and capable of including hydrogen atom which can be replaced with fluorine atom.

Abstract: The present invention provides a phosphorescent luminescent device which has high-efficiency and a long lifetime. The organic electroluminescent device according to the present invention includes a pair of electrodes and an organic layer disposed between the pair of electrodes, wherein the organic layer has at least a light-emitting layer, and the light-emitting layer include at least a host material and dopants containing at least a first dopant and a second dopant, and wherein a triplet lowest excitation level of the first dopant is higher than a triplet lowest excitation level of the host material, and a triplet lowest excitation level of the second dopant is lower than a triplet lowest excitation level of the host material.

Abstract: An organic EL device includes a luminescence layer containing, as a luminescent material allowing a high-luminescence and high-efficiency luminescence for a long period of time, a metal coordination compound represented by the following formula (1): LmML?n, wherein M denotes Ir, Pt, Rh or Pd; L denotes a bidentate ligand; L? denotes a bidentate ligand different from L; m is an integer of 1, 2 or 3; and n is an integer of 0, 1 or 2 with the proviso that the sum of m and n is 2 or 3.

Abstract: A luminescence device comprising a pair of electrodes and an organic compound layer disposed between the electrodes. The layer contains a metal coordination compound represented by the following formula (1): wherein M is Ir, Rh or Pd; n is 2 or 3; and X1 to X8 is, independently, a hydrogen atom or a substituent selected from the group consisting of a halogen atom; a nitro group; a trifluoromethyl group; a trialkylsilyl group having three linear or branched alkyl groups each independently having 1-8 carbon atoms; and a linear or branched alkyl group having 2-20 carbon atoms capable of including one or at least two non-neighboring methylene groups which can be replaced with —O—, —S—, —C(O)—, —C(O)—O—, —O—C(O)—, —CH?CH— or —C?C— and capable of including hydrogen atom which can be replaced with fluorine atom.

Abstract: A compound represented by the following general formula (1). R3—(X)x-(A)a-(Y)y-(B)b-(Z)z-R12??(1) (A, B, X, Y, and Z represent the following general formulae, and CH on a phenylene ring of each of X, Y, and Z may be replaced with an N atom. a, b, x, y, and z each independently represent an integer of 0 to 5, and a?1, y?1, and a+b?2. (R1 to R14 each independently represent a hydrogen atom, or a linear or branched alkyl group.)). The compound can be suitably used as a compound for an organic EL device.

Abstract: The present invention provides a light-emitting device which can be driven at a low voltage and has high luminance, high efficiency, and has a long lifetime even as an organic EL device using phosphorescence. The light-emitting device of the present invention is a light-emitting device including an anode, a cathode, and an organic light-emitting layer sandwiched between the anode and the cathode, in which the organic light-emitting layer is composed of a host material and one or more kinds of dopants, a difference in electron affinity between the host material and at least one kind of the dopants is 0.3 eV or less, and a difference in ionization potential between the host material and the at least one kind of the dopants is 0.8 eV or less.

Abstract: An organic EL device includes a luminescence layer containing a metal coordination compound represented by the following formula (1): LmML?n, wherein M denotes Ir, Pt, Rh or Pd; L denotes a bidentate ligand; L? denotes a bidentate ligand different from L; m is an integer of 1, 2 or 3; and n is an integer of 0, 1 or 2 with the proviso that the sum of m and n is 2 or 3. The partial structure MLm is represented by formula (2) or formula (3) shown below, and the partial structure ML?n is represented by formula (4) or formula (5) shown below: wherein CyN1, CyN2 and CyN3 independently denote a substituted or unsubstituted cyclic group containing a nitrogen atom connected to M; CyN4 denotes a cyclic group containing 8-quinoline or its derivative having a nitrogen atom connected to M.

Abstract: There is provided a high light-emission-efficiency, highly stable, low-cost light emitting device that utilizes a copper complex as a light emitting material and comprises a pair of electrodes provided on a substrate, and an organic substance layer provided between the electrode and comprising a metal coordination compound having a partial structure represented by the general formula: wherein Cu represents a copper ion.

Abstract: A main chain-type or side chain-type polymeric compound having a structure wherein at least one metal complex segment having a plurality ligands is introduced into a main chain or a side chain is provided. In the case where the polymeric compound is the main chain-type polymeric compound, the metal complex segment has at least one ligand constituting a polymer main chain of the polymeric compound and having a carbon atom and oxygen atom bonded to a metal atom. On the other hand, in the case where the polymeric compound is the side chain-type polymeric compound, a polymer main chain thereof has a conjugated structure, preferably a conjugated double bond. A ligand for the polymeric compound includes a chain or cyclic ligand, of which a bidentate ligand having an organic cyclic structure is preferred, and the ligand has at least one carbon atom or oxygen atom and is bonded to a center metal atom, preferably iridium, via the carbon atom or oxygen atom.