摘要:
An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below: 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 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML′n is represented by formula (3) or (4) shown below: The metal coordination compound of the formula (1) is characterized by having at least one aromatic substituent for at least one of CyN1, CyN2, CyC1 and CyC2. The metal coordination compound having the aromatic substituent is effective in providing high-efficiency luminescence, long-term high luminance, and less deterioration by current passing.
摘要翻译:提供具有含有特定金属配位化合物的层的电致发光器件。 金属配位化合物由下式(1)表示:<?in-line-formula description =“In-line Formulas”end =“lead”?> ML sub> L' 其中M是Ir,Pt,Rh或Pd的金属原子;(3)其中M是Ir,Pt,Rh或Pd的金属原子; L和L'是相互不同的二齿配体; m为1,2或3,n为0,1或2,条件是m + n为2或3; 部分结构MLm由下面所示的式(2)表示,并且部分结构ML'N N由如下所示的式(3)或(4)表示:式(1)的金属配位化合物 )的特征在于对于CyN1,CyN2,CyC1和CyC2中的至少一种具有至少一个芳族取代基。 具有芳香族取代基的金属配位化合物在提供高效率发光,长期高亮度和通过电流劣化方面是有效的。
摘要:
A luminescence device exhibiting a better luminescence efficiency is provided by disposing between a pair of electrodes a luminescence layer comprising a mixture of a liquid crystal compound assuming discotic phase or smectic phase with a phosphorescent compound preferably having a planar molecular skeleton.
摘要:
An organic electroluminescence device is made to show an improved carrier transporting ability and an improved carrier injecting property by doping a liquid crystal compound having a high degree of carrier mobility without generating any ionic current. The organic electroluminescence device comprises a carrier transport layer formed by doping a smectic liquid crystal compound having a hexagonal order structure with a Lewis acid compound, a light-emitting layer and a protection layer arranged between the carrier transport layer and the light-emitting layer and composed of an organic compound having a carrier transporting property of the same type as that of carrier transport layer and a carrier conducting property of the type different from that of the carrier transport layer.
摘要:
A liquid crystal device, suitably included in e.g., an organic EL device, is formed of a pair of electrodes and a plurality of layers disposed between the electrodes and including at least one liquid crystal layer. The liquid crystal layer comprises a liquid crystal composition having an electronic carrier-transporting function and comprising at least two compounds including at least one electron-donating compound or electron-accepting compound having a &pgr;-electron conjugated structure. As a result of doping the liquid crystal layer with the electron-donating or electron-accepting compound, the current conduction performance of the liquid crystal layer is improved presumably due to the generation of free carriers therein, whereby a functional device including the liquid crystal device can be improved as a whole.
摘要:
The object of the present invention is to provide a light-emitting device that emits phosphorescence with high efficiency. The light-emitting device of the present invention includes a host containing two kinds of dopants, wherein a dopant having a longer maximum-emission wavelength is doped in a low concentration and has a substituent.
摘要:
The object of the present invention is to provide a light-emitting device that emits phosphorescence with high efficiency. The light-emitting device of the present invention includes a host containing two kinds of dopants, wherein a dopant having a longer maximum-emission wavelength is doped in a low concentration and has a substituent.
摘要:
The object of the present invention is to provide a light-emitting device that emits phosphorescence with high efficiency. The light-emitting device of the present invention includes a host containing two kinds of dopants, wherein a dopant having a longer maximum-emission wavelength is doped in a low concentration and has a substituent.
摘要:
A polymer type organic EL element is improved in terms of the stability and the efficiency and intensity of light emission. A carrier injection layer made of discotic liquid crystal or smectic liquid crystal having an electron resonance structure is interposed between a polymer layer and an electrode.
摘要:
In a conductive liquid crystal device, particularly an organic EL device, including a carrier transporting layer of a conductive liquid crystal and a functional organic layer disposed between a pair of electrodes, a protective layer having a carrier transporting characteristic is inserted between the carrier transporting layer and the organic layer. As a result, deterioration, such as the occurrence of molecular association (such as exciplex), at the boundary between the carrier transporting layer and the organic layer can be effectively prevented, whereby a sufficient luminescence can be attained at a lower voltage to improve the durability of the organic EL device.
摘要:
An electroluminescence device contains a carrier transporting layer comprising a liquid crystal compound represented by R—X—A—B—X′—R′ (I), wherein A and B denote a naphthalene-2,6-diyl skeleton optionally substituted with one or two of F, Cl, Br, CH3 and CF3, at least one of A and B comprising a naphthalene-2,6-diyl skeleton having one to four CH groups replaced with N; X and X′ denote —O—, —S—, —OOC— or —COO—; and one of R and R′ denotes H, F, Cl, Br, CF3 or a linear or branched alkyl group having 1-20 carbon atoms, and the other one of R and R′ denotes a linear or branched alkyl group having 3-20 carbon atoms, said alkyl groups being independently capable of including one methylene group which can be replaced with —O—, —S—, —CH═CH— or —C≡C— so long as heteroatoms are not adjacent to each other.