Abstract: The present invention is an organic EL element in which a material used for a capping layer is a material having a high absorbance as measured at a wavelength of 400 to 410 nm in an absorption spectrum at a concentration of 10?5 mol/L, and the material is selected from an arylamine material which provides excellent stability and durability to a thin film, particularly selected from a diamine compound that has a particular benzazol ring structure having a high refractive index.

Abstract: An object of the present invention is to provide an organic compound that has excellent properties, with excellent hole injection and transport performance, electron blocking capability, and high stability in a thin film state, and furthermore to provide a highly efficient and highly durable organic EL device by using this compound. The present invention relates to a compound having a triarylamine structure and being represented by the structural formula (A-1) below, where A, B, and C may be the same or different, and each represent a group represented by the structural formula (B-1) below, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group, where at least one of A, B, and C is not the group represented by the structural formula (B-1) below. (For the symbols and the like in the formulae, see the descriptions in the specification.

Abstract: A compound including a benzimidazole ring structure, represented by general formula (1). (In formula (1), X1 and X2 may be the same or different and each represent a specific carbon atom or a nitrogen atom, Ar represents a specific group, R1 and R2 may be the same or different and each represent a specific group, and m is an integer of 0-4.

Abstract: [Object] It is an object of the present invention to provide an organic EL device in which various materials for an organic EL device, which is excellent in hole/electron injection/transport performance, electron blocking performance, stability in a thin film state, and durability, are combined as materials for an organic EL device that has high light emission efficiency and high durability so that properties of each of the materials can be effectively expressed, thereby achieving (1) high light emission efficiency and power efficiency, (2) a low light emission start voltage, (3) a low practical driving voltage, and particularly (4) a long lifetime.

Abstract: [Object] It is an object of the present invention to provide, as a material for organic EL device having high efficiency and high durability, an organic compound having excellent characteristics such as excellent electron injection/transport performance, hole blocking performance, and high stability in a film state, and an organic EL device having high efficiency and high durability, which is obtained by using this compound. [Solving Means] A compound having a pyrimidine ring structure, the compound being represented by the following general formula (1). (In the formula, A1 represents a substituted or unsubstituted aromatic heterocyclic group. Ar1 represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group.

Abstract: A compound has an azaindeno phenanthrene ring structure, the compound being represented by the following general formula (A-1).

Abstract: A method for constructing a wall-like structure, the wall-like structure (100) including a pair of layered structural walls (10a and 10b) that are spaced apart from each other and that have a structure in which strip-shaped cured layers are laid, the method including a first step of forming a pair of strip-shaped cured layers (1) by discharging a curable material from two mutually spaced-apart portions of a self-propelled type material deposition apparatus (2) that is moving, and a second step of forming a new strip-shaped cured layer (1) on each of the pair of strip-shaped cured layers (1) by discharging the curable material onto the pair of strip-shaped cured layers (1) while moving the material deposition apparatus (2) with its wheels respectively abutting against the top of the pair of strip-shaped cured layers (1), wherein the second step is repeated to thereby construct the wall-like structure (100) including the pair of layered structural walls (10a and 10b) each having a structure in which strip-shape

Abstract: An organic electroluminescent device comprising at least two organic layers including a light emitting layer (5) and a delayed fluorescent exciplex layer (7) containing a donor compound and an acceptor compound, between a pair of electrodes (2, 9) is highly efficient in formation of a singlet excited state and enables high light emission efficiency.

Abstract: An organic electroluminescent device comprising at least two organic layers including a light emitting layer (5) and a delayed fluorescent exciplex layer (7) containing a donor compound and an acceptor compound, between a pair of electrodes (2, 9) is highly efficient in formation of a singlet excited state and enables high light emission efficiency.