Abstract: An organic electroluminescent element including a pair of electrodes and one or more organic compound layers including at least one light-emitting layer disposed between the pair of electrodes, wherein the at least one light-emitting layer contains at least one luminescent dopant and a plurality of host compounds. The ionization potential of the dopant is Ip(D), the minimum value out of the ionization potentials of the plurality of host compounds is Ip(H)min, and ?Ip is defined by ?Ip=Ip(D)?Ip(H)min and satisfies a relationship of ?Ip>0 eV. The electron affinity of the dopant is Ea(D), the maximum value out of the electron affinities of the plurality of host compounds is Ea(H)max, and ?Ea is defined by ?Ea=EA(H)max?Ea(D) and satisfies a relationship of ?Ea>0 eV.

Abstract: The present invention provides an organic electroluminescent element including an anode, a cathode, and a plurality of organic compound layers including at least one organic luminescent layer between the anode and the cathode, in which the organic luminescent layer contains a host material and two or more phosphorescent materials; the organic luminescent layer is adjacent to the organic compound layers at both an anode side and a cathode side thereof; the organic compound layer disposed adjacent to the organic luminescent layer at the anode side thereby has a thickness of 50 nm or less in thickness; and the organic compound layer disposed adjacent to organic luminescent layer at the cathode side thereby contains a compound having an ionization potential of 6.0 eV or less. The present invention also provides a display device using the organic electroluminescent element.

Abstract: A method of producing a metal plated material, the method including: preparing a polymer solution containing a polymer; preparing a composition by mixing the polymer solution with a monomer at an amount of from 30% by mass to 200% by mass with respect to the polymer, at least one of the polymer or the monomer having a non-dissociative functional group that interacts with a plating catalyst or a precursor thereof, forming a cured layer on a substrate by applying the composition, drying the composition and curing the composition; applying the plating catalyst or the precursor thereof to the cured layer; and conducting plating with respect to the plating catalyst or the precursor thereof to form a plating film on the cured layer.

Abstract: A wheel for vehicle includes a wheel body, a decorated member, and a visible space. The wheel body has a rim, a hub, and a plurality of spokes connecting the hub and the rim. The decorated member is made from resin, is disposed on a surface of at least one of the spokes, and is retained to the wheel body. The visible space is disposed between the decorated member and the one of the spokes at least, exhibits a height in an axial direction of the wheel body, and is visible from an axial outer side of the wheel body.

Abstract: A composition for an organic electroluminescent element used for forming a pattern by an ink jet method, the composition having at least one metal complex having a tridentate or higher-dentate ligand. Also provided are a method for manufacturing an organic electroluminescent element including forming an organic compound layer by discharging the composition for an organic electroluminescent element in a pattern with an ink jet apparatus, a method for manufacturing an organic electroluminescent element including using a transfer material having an organic compound layer containing a metal complex having a tridentate or higher-dentate ligand, and organic electroluminescent elements manufactured by these methods.

Abstract: The present invention provides a light source including: a substrate, at least two or more linear organic electroluminescent devices arranged in parallel on the substrate; and a sealing member covering over the organic electroluminescent devices to seal them on the substrate; wherein the organic electroluminescent devices have an aspect ratio of 200 or more, and the sealing member has a length of 200 mm or more along the longitudinal direction of the organic electroluminescent devices and a thickness of 4 mm or more.

Abstract: The invention provides an organic electroluminescent device having one or more organic compound layers between a pair of electrodes, the one or more organic compound layers including at least a luminescent layer, wherein a host material and at least two different luminescent materials including at least one phosphorescent material are contained in the same luminescent layer, and the luminescent layer has a region containing the host material and one luminescent material and a region containing the host material and at least two luminescent materials in the thickness direction of the luminescent layer.

Abstract: The invention provides an organic electroluminescent device having at least two luminescent layers provided between a pair of electrodes. Each of the luminescent layers contains a light-emitting material having a structure different from a structure of a light-emitting material contained in other luminescent layers. At least one of the light-emitting materials is a phosphorescence light-emitting material. Each of the luminescent layers is adjacent to another luminescent layer via a buffer layer. Further, the buffer layer includes an organic compound having an energy difference (Eg) between the highest occupied orbit and the lowest non-occupied orbit of 4.0 eV or more. It is preferable that the lowest excited triplet energy level (Ti) of the organic compound is 2.7 eV or more.

Abstract: An organic electroluminescent element including a pair of electrodes and one or more organic compound layers including at least one light-emitting layer disposed between the pair of electrodes, wherein the at least one light-emitting layer contains at least one luminescent dopant and a plurality of host compounds. The ionization potential of the dopant is Ip(D), the minimum value out of the ionization potentials of the plurality of host compounds is Ip(H)min, and ?Ip is defined by ?Ip=Ip(D)-Ip(H)min and satisfies a relationship of ?Ip>0 eV. The electron affinity of the dopant is Ea(D), the maximum value out of the electron affinities of the plurality of host compounds is Ea(H)max, and ?Ea is defined by ?Ea=Ea(H)max-Ea(D) and satisfies a relationship of ?Ea>0 eV.

Abstract: The present invention provides an organic electroluminescent element including an anode, a cathode, and a plurality of organic compound layers including at least one organic luminescent layer between the anode and the cathode, in which the organic luminescent layer contains a host material and two or more phosphorescent materials; the organic luminescent layer is adjacent to the organic compound layers at both an anode side and a cathode side thereof; the organic compound layer disposed adjacent to the organic luminescent layer at the anode side thereby has a thickness of 50 nm or less in thickness; and the organic compound layer disposed adjacent to organic luminescent layer at the cathode side thereby contains a compound having an ionization potential of 6.0 eV or less. The present invention also provides a display device using the organic electroluminescent element.

Abstract: A photothermographic image recording element has on a support a photosensitive layer containing a non-photosensitive organic silver salt, a photosensitive silver halide, and a binder, wherein the organic silver salt has been formed in the presence of a tertiary alcohol. The photosensitive layer and/or a layer disposed adjacent thereto contains a nucleating agent. Alternatively, the photosensitive layer contains the silver halide which has been formed independent from the organic silver salt and added during preparation of a coating solution, and the main binder is a polymer latex having a Tg of −30° C. to 40° C. The element shows low fog, high contrast, and high sensitivity.

Abstract: A photothermographic image forming element contains a non-photosensitive silver salt which has been formed by simultaneously adding and mixing previously prepared solutions of silver nitrate and an organic acid alkali metal salt. A photosensitive layer containing a photosensitive silver halide or a layer disposed adjacent thereto or both contain a nucleating agent. The element produces a low fog, high contrast image.

Abstract: A photothermographic image recording element has on a support a photosensitive layer containing a non-photosensitive organic silver salt, a photosensitive silver halide, and a binder, wherein the organic silver salt has been formed in the presence of a tertiary alcohol. The photosensitive layer and/or a layer disposed adjacent thereto contains a nucleating agent. Alternatively, the photosensitive layer contains the silver halide which has been formed independent from the organic silver salt and added during preparation of a coating solution, and the main binder is a polymer latex having a Tg of −30° C. to 40° C. The element shows low fog, high contrast, and high sensitivity.