Abstract: Provided are a color display device capable of colorized display in a reflection type display device which is adopted to electronic paper and the like without degrading the degree of brightness and with high efficiency, and also with ease and lower costs, and a method of producing the same.

Abstract: Disclosed is an organic electroluminescent device (organic EL device) that is improved in the luminous efficiency, fully secured of the driving stability, and of a simple structure and also disclosed is a compound for organic EL device useful for the said device. The compound for organic EL device is, for example, an indolocarbazole derivative represented by the following general formula (3). The organic EL device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer comprises a phosphorescent dopant and the aforementioned indolocarbazole derivative as a host material. In general formula (3), L is an aromatic heterocyclic group of a fused-ring structure with a valence of (n+1), Ar1 to Ar3 each is an alkyl group, an aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon or aromatic heterocyclic group, and n is an integer of 0-5.

Abstract: Provided is a material suitable for an optical element, which can be applied by inkjet, has an ultraviolet curable characteristic, and yields a cured product excellent in transparency and hardness and having a refractive index of more than 1.5. Specifically, an optical element excellent in transparency and hardness and having a refractive index of more than 1.5 is obtained by preparing a resin composition including at least: (A) 5 to 45 mass % of a vinyl group-containing copolymer obtained by copolymerization of a divinyl aromatic compound; (B) 55 to 94 mass % of a liquid photocurable polyfunctional (meth)acrylate having two or more (meth)acryloyl groups; (C) 0.97 to 20 mass % of a photopolymerization initiator; and (D) 0.03 to 1 mass % of a surfactant, and applying the resin composition onto a support substrate by inkjet, followed by photocuring.

Abstract: Disclosed is a highly reliable organic electroluminescent device, in particular, a phosphorescent organic electroluminescent device using a low-molecular-weight host material, wherein a good balance between electron and hole injection and an efficient mechanism of phosphorescence are maintained. The organic electroluminescent device contains a light-emitting layer between an anode layer and a cathode layer and the light-emitting layer comprises a phosphorescent dopant material and a host material with a molecular weight of not more than 10,000. The host material is composed of a first host material and a second host material that is different from the first host material and the first host material differs from the second host material by not more than 0.1 eV in the ionization potential (IP), by not more than 0.1 eV in the electron affinity (EA), and by not more than 0.1 eV in the triplet energy (T1).

Abstract: Provided are a silicone resin that yields a cured product excellent in flexibility, toughness, and heat resistance and high in transparency, a process for producing the said silicone resin, and a curable resin composition comprising the said silicone resin. The silicone resin is obtained by reacting an organopolysiloxane containing SiH groups represented by general formula (3) with an organopolysiloxane containing hydroxyl groups at both ends represented by general formula (5) and an alcohol containing radically reactive groups represented by general formula (6) in the presence of a hydroxylamine compound represented by general formula (4) as a catalyst and this silicone resin is used in formulating a curable resin composition.

Abstract: Provided is an organic electroluminescent device (organic EL device) which has improved luminous efficiency and a simple configuration, while ensuring sufficient driving stability. This organic electroluminescent device includes a light-emitting layer between an anode and a cathode that are laminated on a substrate. The light-emitting layer contains a phosphorescent light-emitting dopant, and a carbazole compound represented by the following formula (1) as a host material. In the formula (1), E represents oxygen or sulfur, and R1 to R6 each represent hydrogen, an alkyl group, a cycloalkyl group, or an aromatic group represented by the formula (2). In the formula (2), X represents CR9 or nitrogen.

Abstract: Provided are a material for an organic electroluminescent element formed of a silicon-containing four-membered ring compound, and an organic electroluminescent element using the material. The material for an organic electroluminescent element is formed of a compound represented by the following formula (1) and is used for, for example, a light-emitting layer containing a phosphorescent light-emitting dopant in an organic electroluminescent element. In the formula, X represents nitrogen or phosphorus, L's each represent an (n+1)-valent aromatic hydrocarbon group or aromatic heterocyclic group, and at least one of the L's represents an aromatic heterocyclic group. A1 to A6 each represent an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, an aromatic heterocyclic group, or an amino group, and n represents an integer of 0 to 3.

Abstract: A dew condensation sensor is described, including a nano-composite for generating local surface plasmon resonance, a light reflecting member disposed on one side of the nano-composite, a protection layer laminated on the light reflecting member, a light source/light receiver disposed facing the nano-composite, a spectroscope (or photo-detector) for detecting the light reflected by the light source/light receiver, a controller connected to the light source/light receiver and the spectroscope (or photo-detector) and used for overall control thereof, and a display unit connected to the controller. The dew condensation sensor detects occurrence of dew condensation based on the variation in the absorption spectrum, the absorption intensity or the reflected-light intensity of the local surface plasmon resonance of the nano-composite.

Abstract: To provide a dye-sensitized solar cell with suppressed photoelectric conversion efficiency deterioration due to a gap to be possibly be generated between a transparent member on which a light is incident and the dye-sensitized solar cell components. A dye-sensitized solar cell 10 is provided with a dye-sensitized solar cell components unit 14 arranged within a cylindrical transparent member 12, the unit having an electrolyte layer, current collecting electrode 18, and porous semiconductor layer 20 carrying dye cylindrically laminated in this order centering around a cathode electrode layer 16. The cathode electrode layer 16 is a spring body, and the dye-sensitized solar cell components unit 14 is pressed to the transparent member 12 with an elastic restoring force of the spring.

Abstract: Provided are a novel nitrogen-containing aromatic heterocyclic compound and an organic electronic device using the compound. This nitrogen-containing aromatic compound is represented by the general formula (1). Further, the present invention relates to organic electronic devices such as a light-emitting device, a thin-film transistor, and a photovoltaic device each using the nitrogen-containing aromatic compound. (L represents an m+n-valent aromatic hydrocarbon group or aromatic heterocyclic group, or a group arising from a triarylamine or a diaryl sulfone; X represents N-A, O, S, or Se; A represents an alkyl group or the like; R represent hydrogen, an alkyl group, an aromatic group, or the like; and m+n is an integer of 2 to 4.

Abstract: Provided are a nitrogen-containing aromatic heterocyclic compound useful as an organic semiconductor material and an organic electronic device using this compound. The nitrogen-containing aromatic heterocyclic compound has a fused indole skeleton represented by the following formula (1), the organic semiconductor material contains the compound, and the organic electronic device uses the organic semiconductor material. In general formula (1), X is N-A?, O, S, or Se; A is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group exclusive of a fused heterocycle consisting of 4 rings or more; and R is a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aromatic hydrocarbon group, or an aromatic heterocyclic group exclusive of a fused heterocycle consisting of 4 rings or more.

Abstract: A metal nanoparticle composite is provided, in which a matrix resin layer and metal nanoparticles are immobilized on the matrix resin layer. The metal nanoparticle composite has the following characteristics: a) the metal nanoparticles are obtained by heat-reducing metal ions or metal salts contained in the matrix resin layer or a precursor resin layer thereof; b) the metal nanoparticles exist within a region from the surface of the matrix resin layer to a depth of at least 50 nm; c) particle diameters of the metal nanoparticles are in the range of 1 nm to 100 nm with the mean particle diameter of greater than and equal to 3 nm; and d) a spacing between adjacent metal nanoparticles is greater than and equal to the particle diameter of a larger one of the adjacent metal nanoparticles.

Abstract: Disclosed is an organic electroluminescent device (organic EL device) which can achieve high efficiency and long lifetime even when driven at low voltage. The organic El device comprises at least a light-emitting layer and an electron-transporting layer between an anode and a cathode facing each other. The electron-transporting layer consists of two layers, namely, a first electron-transporting layer and a second electron-transporting layer and the first electron-transporting layer and the second electron-transporting layer are arranged sequentially in this order from the light-emitting layer side to the cathode side. The first electron-transporting layer contains an indole derivative in which the ring nitrogen atom is substituted with an aromatic group and an aromatic ring is fused to the indole ring.

Abstract: A dye-sensitized solar cell is provided, wherein it can be produced by a relatively easy and simple process and ensures high conversion efficiency even in cases where the thickness of the porous semiconductor layer is increased. The dye-sensitized solar cell 10 includes, in the interior of or on the conductive-substrate-side surface of the porous semiconductor layer 16, conductive metal film 20, such as a film of tungsten, having a large number of randomly located penetrations 24. Penetrations 24 of the conductive metal film 20 are formed by forming a fine-particle layer on the surface of the porous semiconductor layer, forming a conductive metal film on the surface of the fine-particle layer, and making the fine-particle layer disappear by heating or solvent-cleaning.

Abstract: Provided are a silicone resin that yields a cured product excellent in flexibility, toughness, and heat resistance and high in transparency, a process for producing the said silicone resin, and a curable resin composition comprising the said silicone resin. The silicone resin is obtained by reacting an organopolysiloxane containing SiH groups represented by general formula (3) with an organopolysiloxane containing hydroxyl groups at both ends represented by general formula (5) and an alcohol containing radically reactive groups represented by general formula (6) in the presence of a hydroxylamine compound represented by general formula (4) as a catalyst and this silicone resin is used in formulating a curable resin composition.

Abstract: A dye-sensitized solar cell is provided, wherein it can be produced by a relatively easy and simple process and ensures high conversion efficiency even in cases where the thickness of the porous semiconductor layer is increased. The dye-sensitized solar cell 10 includes, in the interior of or on the conductive-substrate-side surface of the porous semiconductor layer 16, conductive metal film 20, such as a film of tungsten, having a large number of randomly located penetrations 24. Penetrations 24 of the conductive metal film 20 are formed by forming a fine-particle layer on the surface of the porous semiconductor layer, forming a conductive metal film on the surface of the fine-particle layer, and making the fine-particle layer disappear by heating or solvent-cleaning.

Abstract: Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of high driving stability, and of a simple structure. The organic EL device is constituted of an anode, organic layers containing a phosphorescent light-emitting layer, and a cathode piled one upon another on a substrate and a phosphine oxide derivative represented by general formula (1) is contained in a phosphorescent light-emitting layer, an electron-transporting layer, a hole-blocking layer, or an exciton-blocking layer. In general formula (1), L1 is a direct bond or an aromatic group with a valence of 1-3 and Ar1 is an aromatic group. The two Ar1 groups linked to the same nitrogen atom may form a nitrogen heterocycle and may further form a fused ring together with the said nitrogen heterocycle.

Abstract: Disclosed are an organic electroluminescent device (organic EL device) that is improved in luminous efficiency and fully assured of driving stability and has a simple structure and an organic metal complex suitable therefor. The organic metal complex is represented by the following general formula (I) wherein Ar1 denotes an aromatic hydrocarbon group or a heteroaromatic group and may have substituents, Ar2 and Ar3 respectively denote an aromatic hydrocarbon group or a heteroaromatic group and may have substituents, M denotes a trivalent metal, and L denotes an arylate ligand containing a hetero ring having at least one nitrogen atom capable of coordinating M. This organic metal complex, along with a phosphorescent dopant, is suitable for a material constituting the light-emitting layer of an organic EL device.

Abstract: Disclosed is an organic electroluminescent device (organic EL device) that is improved in the luminous efficiency, fully secured of the driving stability, and of a simple structure and disclosed also is a compound useful therefor. The organic EL device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer comprises a phosphorescent dopant and an indolocarbazole derivative as a host material. The indolocarbazole derivative is represented by the following formula (3) wherein Ar is an aromatic group and L is a direct bond or an aromatic group.

Abstract: Disclosed is an organic electroluminescent device (organic EL device) that is improved in the luminous efficiency, fully secured of the driving stability, and of a simple structure. The organic EL device comprises a light-emitting layer between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer comprises (A) a phosphorescent dopant whose emission peak wavelength is longer than 600 nm and (B) a host material. The host material contains at least two kinds of compounds selected from two or more kinds of derivatives included in (b1) N-substituted indolocarbazole derivatives, (b2) derivatives of 8-hydroxyquinoline aluminum complex, and (b3) bisindolocarbazole derivatives.