A compound represented by formula (1) or a salt thereof, and an ink including the same. In formula (1), each Q independently represents a halogen atom; R.sup.11 and R.sup.12 independently represent an alkyl group substituted by an ionic hydrophilic group; and A.sup.1 represents a C1-C3 alkoxy-substituted alkylamino group ##STR00001##

A compound represented by formula (1) or a salt thereof, and an ink including the same. In formula (1), each Q independently represents a halogen atom; R.sup.11 and R.sup.12 independently represent an alkyl group substituted by an ionic hydrophilic group; and A.sup.1 represents a C1-C3 alkoxy-substituted alkylamino group ##STR00001##

A squarylium dye [A] that has high invisibility, i.e., exhibits low absorption in the visible light region (400 nm to 750 nm), has excellent near-infrared absorption capability and high light resistance, tends not to exhibit aggregations, and has specific X-ray diffraction peaks; and an image-forming material and the like containing the squarylium dye [A] having said characteristics. The problem is solved by a squarylium dye [A] having specific X-ray diffraction peaks represented by general formula (1). Moreover, the problem is also solved by various materials containing the squarylium dye [A].

A squarylium dye [A] that has high invisibility, i.e., exhibits low absorption in the visible light region (400 nm to 750 nm), has excellent near-infrared absorption capability and high light resistance, tends not to exhibit aggregations, and has specific X-ray diffraction peaks; and an image-forming material and the like containing the squarylium dye [A] having said characteristics. The problem is solved by a squarylium dye [A] having specific X-ray diffraction peaks represented by general formula (1). Moreover, the problem is also solved by various materials containing the squarylium dye [A].

Disclosed is a composition containing copper particles and organic solvents, in which the organic solvents include a first organic solvent having a vapor pressure at 20° C. of 200 Pa or more and 20 kPa or less, and a second organic solvent having a vapor pressure at 20° C. of 0.5 Pa or more and less than 200 Pa.

Disclosed is a composition containing copper particles and organic solvents, in which the organic solvents include a first organic solvent having a vapor pressure at 20° C. of 200 Pa or more and 20 kPa or less, and a second organic solvent having a vapor pressure at 20° C. of 0.5 Pa or more and less than 200 Pa.

Disclosed herein is a polymeric film, the film comprising a polymeric matrix material, a plurality of perovskite nanocrystals and/or aggregates of perovskite nanocrystals dispersed throughout the polymeric matrix material. There is also disclosed a perovskite polymer resin composition, a perovskite-polymer resin composition, a perovskite ink and a method of forming a luminescent film using any one of the compositions or ink. Preferably, the perovskite material is a lead halide perovskite containing a cation selected from Cs, an alkylammonium ion, or a formamidinium ion. The polymeric matrix is preferably formed from monomers comprising a vinyl or an acrylate group.

The present specification relates to an ink composition including: a compound represented by Formula 1; and a solvent represented by the Formula 2, and a method for manufacturing an organic light emitting device formed by using the ink composition.

The present specification relates to an ink composition including: a compound represented by Formula 1; and a solvent represented by the Formula 2, and a method for manufacturing an organic light emitting device formed by using the ink composition.

A composite sheet for shielding electromagnetic and radiating heat includes: a first layer formed of metal; and a second layer that is a graphene layer formed on one surface of the first layer and including charged chemically modified graphene such that thermal conductivity and electromagnetic shielding ability are improved while securing economic efficiency by using the second layer including the charged chemically modified graphene and the graphene flakes.