摘要:
A liquid crystal device, includes: (a) a liquid crystal cell includes a pair of base plates, and a ferroelectric smectic liquid crystal having a negative dielectric anisotropy, (b) a device for applying to the ferroelectric liquid crystal an alternating electric field capable of causing the crystal to assume at least two stable orientation states including a first stable orientation state and a second stable orientation state, (c) a device for changing the frequency or voltage value of the alternating electric field corresponding to a temperature change, (d) a device for selectively applying a first electric field for orienting the ferroelectric liquid crystal to the first stable orientation state and a second electric field for orienting the ferroelectric liquid crystal to the second stable orientation state, and (e) a device for detecting an optical difference between light rays having passed through the ferroelectric liquid crystal oriented to the first orientation state and light rays having passed through the ferroelectric liquid crystal oriented to the second orientation state.
摘要:
A ferroelectric liquid crystal device is by disposing between a pair of substrates a ferroelectric liquid crystal composition showing a phase transition series of isotropic.fwdarw.chiral nematic phase (N.sup.*).fwdarw.chiral smectic C phase on temperature decrease. The alignment state of the liquid crystal is improved by forming alignment control films of mutually different materials on the pair of substrates. The alignment state is improved especially when the liquid crystal composition is formulated to show a helical pitch in N.sup.* phase which exceeds three times the spacing between the pair of substrates.
摘要:
An object of the present invention is to provide a light emitting device having high luminous efficiency and high stability. The light emitting device includes two electrodes and a light emitting layer interposed between the two electrodes, in which the light emitting layer contains luminous nanoparticles, and the luminous nanoparticles each have a particle diameter smaller than a thickness of the light emitting layer, and each include a metal coordination compound having a ligand formed of an organic compound.
摘要:
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 first and second dopants for improving the dispersability thereof. As the first dopant, there is employed a phosphorescent dopant. The amount of the second dopant is greater than the amount of the first dopant.
摘要:
To provide a light emitting device capable of emitting light with high efficiency and of being formed by a coating process, the present invention provides a light emitting device including as a light emitting material a polymeric mixed-metal complex containing two or more kinds of metals selected from Cu, Ag, and Au.
摘要:
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.
摘要:
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 2or 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 a hydrogen atom which can be replaced with a fluorine atom.
摘要:
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 (1): wherein Cu represents a copper ion.
摘要:
A main chain-type or side chain-type polymeric compound having a structure wherein at least one metal complex segment having a plurality of 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. In a case of forming a luminescence layer by using the polymeric compound as a luminescent material, a resultant organic luminescence device is less liable to cause a concentration extinction and is a high-luminescence efficiency device excellent in stability.
摘要:
There is provided a light-emitting material comprising a metal coordination compound having a partial structure represented by the following general formula (1). The light-emitting material has high luminous efficiency and high stability and can be produced at a low cost.