Abstract: A blue organic electroluminescent device (1) including at least an emitting layer (40) between an anode (20) and a cathode (60), the emitting layer (40) including a host material and a plurality of dopants, at least one of the dopants having ultraviolet luminescent properties.

Abstract: An organic electroluminescence device comprising a compound having a specific structure having a heteroatom and an organic 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 above compound. The device provides excellent efficiency of light emission, forms no defects in pixels, exhibits excellent heat resistance and has a long life.

Abstract: An organic electroluminescent device including a pair of electrodes, and at least two organic emitting layers held between the pair of electrodes, (1) two organic emitting layers being arranged with an electron barrier layer interposed therebetween, (2) the two organic emitting layers both including an electron-transporting emitting material.

Abstract: There are provided oligoarylene derivatives capable of emitting blue light at high luminous efficiency which are represented by the following general formulae (1) to (4): Ar1?Ch?Ar2??(1) Ch1?L?Ch2??(2) Ar3?(L1)a?Ch3?(L2)b?Ar4??(3) Ar5?Ch4?(Ar7)n?L3?(Ar8)m?Ch5?Ar6??(4) wherein Ch, Ch1 and Ch2 are respectively a group containing at least one substituted or unsubstituted condensed aromatic ring having 14 to 20 nuclear atoms; Ch3, Ch4 and Ch5 are respectively a substituted or unsubstituted arylene group having 14 to 20 nuclear atoms; Ar1, Ar2, Ar3, Ar4, Ar5 and Ar6 are respectively a substituted or unsubstituted aryl group having 5 to 30 nuclear atoms; Ar7 and Ar8 are respectively a substituted or unsubstituted arylene group having 5 to 30 nuclear atoms; L1, L2 and L3 are respectively a connecting group; and a, b, n and m are respectively an integer of 0 to 1, as well as organic electroluminescent devices using the same.

Abstract: There are provided oligoarylene derivatives capable of emitting blue light at high luminous efficiency which are represented by the following general formulae (1) to (4): Ar1—Ch—Ar2??(1) Ch1-L-Ch2??(2) Ar3-(L1)a-Ch3-(L2)b-Ar4??(3) Ar5—Ch4—(Ar7)n-L3-(Ar8)m—Ch5—Ar6??(4) wherein Ch, Ch1 and Ch2 are respectively a group containing at least one substituted or unsubstituted condensed aromatic ring having 14 to 20 nuclear atoms; Ch3, Ch4 and Ch5 are respectively a substituted or unsubstituted arylene group having 14 to 20 nuclear atoms; Ar1, Ar2, Ar3, Ar4, Ar5 and Ar6 are respectively a substituted or unsubstituted aryl group having 5 to 30 nuclear atoms; Ar7 and Ar8 are respectively a substituted or unsubstituted arylene group having 5 to 30 nuclear atoms; L1, L2 and L3 are respectively a connecting group; and a, b, n and m are respectively an integer of 0 to 1, as well as organic electroluminescent devices using the same.

Abstract: An organic electroluminescent device including at least an anode, a first emitting layer, a hole barrier layer, a second emitting layer and a cathode in this order. The first emitting layer and the second emitting layer both include a hole transporting material. The organic EL device is small in chromaticity change and has high efficiency.

Abstract: There are provided oligoarylene derivatives capable of emitting blue light at high luminous efficiency which are represented by the following general formulae (1) to (4): Ar1-Ch-Ar2 ??(1) Ch1-L-Ch2 ??(2) Ar3-(L1)a-Ch3-(L2)b-Ar4 ??(3) Ar5-Ch4-(Ar7)n-L3-(Ar8)m-Ch5-Ar6 ??(4) wherein Ch, Ch1 and Ch2 are respectively a group containing at least one substituted or unsubstituted condensed aromatic ring having 14 to 20 nuclear atoms; Ch3, Ch4 and Ch5 are respectively a substituted or unsubstituted arylene group having 14 to 20 nuclear atoms; Ar1, Ar2, Ar3, Ar4, Ar5 and Ar6 are respectively a substituted or unsubstituted aryl group having 5 to 30 nuclear atoms; Ar7 and Ar8 are respectively a substituted or unsubstituted arylene group having 5 to 30 nuclear atoms; L1, L2 and L3 are respectively a connecting group; and a, b, n and m are respectively an integer of 0 to 1, as well as organic electroluminescent devices using the same.

Abstract: An organic electroluminescent device having a structure in which an emitting layer (3) containing an organic metal complex having at least a heavy metal as a central metal and an electron-transporting layer (4) are stacked between an anode (2) and a cathode (1), wherein a difference (?AF) in electron affinity between a main organic material forming the emitting layer (3) and a main material forming the electron-transporting layer (4) satisfies the following expression; “0.2 eV<?AF?0.65 eV”.

Abstract: Provided are a novel nitrogen-containing heterocyclic derivative having a specific structure and an organic electroluminescence device having an organic thin film layer composed of one or a plurality of layers including at least a light emitting layer and interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the nitrogen-containing heterocyclic derivative alone or as a component of a mixture. As a result, a novel nitrogen-containing heterocyclic derivative useful as a component of an organic electroluminescence device can be provided, and an organic electroluminescence device being driven at a low voltage and having high luminous efficiency, excellent electron transporting property, and high emission luminance can be realized by using the nitrogen-containing heterocyclic derivative in at least one layer of its organic thin film layer.

Abstract: Organic electroluminescent device (100) having a multilayer structure including at least emitting layer (15) and electron-transporting layer (16) between cathodes (17) and (18) and anode (12), the triplet energy gap (EgT) of a host material forming emitting layer (15) being 2.52 eV or more and 3.7 eV or less, an electron-transporting material forming electron-transporting layer (16) being different from the host material, and having hole-transporting properties, and emitting layer (15) including a phosphorescent metal complex compound containing a heavy metal.

Abstract: An organic electroluminescence device having a layer of an organic light emitting medium which comprises (A) a specific arylamine compound and (B) at least one compound selected from specific anthracene derivatives, spirofluorene derivatives, compounds having condensed rings and metal complex compounds and is disposed between a pair of electrodes and an organic light emitting medium comprising the above components (A) and (B) are provided. The organic electroluminescence device exhibits a high purity of color, has excellent heat resistance and a long life and efficiently emits bluish to yellowish light. The organic light emitting medium can be advantageously used for the organic electroluminescence device.

Abstract: A material for organic electroluminescence device with specific structure. 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, which is superior in heat resistance and prolonged lifetime is obtained.

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 pair of electrodes, and at least two organic emitting layers held between the pair of electrodes, (1) two organic emitting layers being arranged with an electron barrier layer interposed therebetween, (2) the two organic emitting layers both including an electron-transporting emitting material.

Abstract: An organic EL device 100 including a plurality of emitting layers (15) and (17) between a cathode (18) and (19) and an anode (12), each of the emitting layers (15) and (17) made of a host material having a triplet energy gap of 2.52 eV or more and 3.7 eV or less, and a dopant having a light emitting property related to a triplet state, the dopant containing a metal complex with a heavy metal.

Abstract: A novel heterocyclic derivative containing nitrogen having specific structure, and an organic EL device comprising at least one organic thin film layer comprising a light emitting layer interposed between a pair of electrodes consisting of an anode and a cathode in which at least one layer of the organic thin film layers comprises the novel heterocyclic derivative containing nitrogen singly or as its mixture component, are provided. By applying the heterocyclic derivative containing nitrogen to at least one organic layer, an organic EL device exhibits excellent emission luminance and current efficiency even at low electric voltage.

Abstract: A material for organic electroluminescence devices comprising a compound having a specific structure and an organic electroluminescence device comprising an organic thin film layer which comprises one layer or a plurality of layers comprising at least a light emitting layer and disposed between a cathode and an anode, wherein at least one layer in the organic thin film layer comprises the material for organic electroluminescence devices, are provided. The material provides the organic electroluminescence device exhibiting a great efficiency of light emission, having no defect pixels, exhibiting excellent heat resistance and having a long life.

Abstract: An organic electroluminescent device (1) comprising: an anode (20), a cathode (70) and a plurality of layers comprising at least a hole-injecting-transporting layer (30) in contact with the anode (20) and an emitting layer. (40), the plurality of layers being provided between the anode (20) and the cathode (70), a difference in ionization potential between the hole-injecting-transporting layer (30) and the anode (20) being more than 0.7 eV.

Abstract: A blue organic electroluminescent device (1) including at least an emitting layer (40) between an anode (20) and a cathode (60), the emitting layer (40) including a host material and a plurality of dopants, at least one of the dopants having ultraviolet luminescent properties.

Abstract: An organic electroluminescent device (1) including an anode (2), a cathode (6), and at least a first layer (3), a second layer (4), and a third layer (5) provided between the anode (2) and the cathode (6). At least one of the first to third layers (3), (4), and (5) includes a phosphorescent compound, and at least one of the first to third layers (3), (4), and (5) is an emitting layer. Compounds respectively forming the first to third layers (3), (4), and (5) and having the largest ionization potentials of the respective layers have an ionization potential of 5.7 eV or more and differ in the ionization potential in an amount of less than 1.0 eV.