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Kitakyūshū, Japan

Nippon Steel Chemical Co. | Date: 2011-02-08

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.

Kyushu Institute of Technology and Nippon Steel Chemical Co. | Date: 2013-12-23

Provided is a dye-sensitized solar cell, and a method for manufacturing the same, that in a technology in which a current collector electrode is used instead of a transparent conductive film, can be manufactured by a simple cell producing operation and is capable of achieving a desirably thin thickness for the current collector electrode. A dye-sensitized solar cell

Nippon Steel Chemical Co. and Kyushu Institute of Technology | Date: 2011-11-23

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

Nippon Steel Chemical Co. | Date: 2011-01-27

Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device comprises organic layers between an anode and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer contains a carbazole compound represented by the following formula (1). In the case where the light-emitting layer of the organic electroluminescent device contains a phosphorescent dopant and a host material, it is the carbazole compound that is contained as the host material. In formula (1), X is CY or a nitrogen atom; Y is a hydrogen atom, an alkyl group, a cycloalkyl group, or an aromatic group; n is an integer of 2 to 4: A is an n-valent aromatic group; L is a direct bond or a divalent aromatic group; and R is a hydrogen atom, an alkyl group, or a cycloalkyl group.

A liquid-state resin composition containing an aromatic polyisocyanate compound (A), a bisphenol epoxy resin (B) and an imidazole compound (C) is described, wherein the molar ratio of isocyanate groups to epoxy groups is 2 or more and preferably 2 to 15, and the amount of (C) relative to the total weight of (A), (B) and (C) is in the range of 0.2 wt % to 0.8 wt %. By stir-mixing (B) and (C), adding (A), stir-mixing again, and vacuum-degassing the resulting resin composition, a highly thermo-resistant isocyanurated cured material with a glass transition temperature of 250 C. or higher can be obtained by heat-curing the resin composition, without forming a gelated substance or bubbles.

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