The present disclosure relates to a ligand for a quantum dot, a ligand quantum dot, a quantum dot layer and a method for patterning the same. The surface of the ligand quantum dot of the present disclosure is connected with the cleavage-type ligand including a first ligand unit A, a cleavage unit B, and an adhesion adjusting unit C. The method includes: providing a substrate; coating a mixture containing the ligand quantum dot on the substrate to form a quantum dot film; exposing a preset region of the quantum dot film to ultraviolet light, so that the cleavage unit B in the cleavage-type ligand undergoes a photolysis reaction, and a molecular segment containing the adhesion adjusting unit C and obtained after decomposition is detached from a surface of the quantum dot; and washing off an unexposed region of the quantum dot film with an organic solvent, followed by drying.

The present invention relates to an aqueous gravure ink containing pigment particles A, polymer particles B and water, the aqueous gravure ink being capable of satisfying at least one of the following requirements 1 and 2: Requirement 1: an average particle size of whole particles in the aqueous gravure ink is not less than 150 nm and not more than 500 nm, and a polydispersity index in a particle size distribution of the whole particles is not less than 0.10 and not more than 0.30; and Requirement 2: an average particle size of the pigment particles A is not less than 140 nm and not more than 550 nm, and a polydispersity index in a particle size distribution of the pigment particles A is not less than 0.08 and not more than 0.32, and an average particle size of the polymer particles B is not less than 30 nm and not more than 220 nm, and a polydispersity index in a particle size distribution of the polymer particles B is not less than 0.08 and not more than 0.32. The aqueous gravure ink of the present invention is excellent in storage stability and is capable of providing a printed material that is excellent in rub fastness and adhesion properties.

The present invention relates to an aqueous gravure ink containing pigment particles A, polymer particles B and water, the aqueous gravure ink being capable of satisfying at least one of the following requirements 1 and 2: Requirement 1: an average particle size of whole particles in the aqueous gravure ink is not less than 150 nm and not more than 500 nm, and a polydispersity index in a particle size distribution of the whole particles is not less than 0.10 and not more than 0.30; and Requirement 2: an average particle size of the pigment particles A is not less than 140 nm and not more than 550 nm, and a polydispersity index in a particle size distribution of the pigment particles A is not less than 0.08 and not more than 0.32, and an average particle size of the polymer particles B is not less than 30 nm and not more than 220 nm, and a polydispersity index in a particle size distribution of the polymer particles B is not less than 0.08 and not more than 0.32. The aqueous gravure ink of the present invention is excellent in storage stability and is capable of providing a printed material that is excellent in rub fastness and adhesion properties.

An example dye sublimation inkjet ink set includes a first dye sublimation inkjet ink and a second dye sublimation inkjet ink. The first dye sublimation inkjet ink includes a disperse dye colorant dispersion including a first disperse dye having absorption at a radiation wavelength ranging from about 360 nm to about 410 nm; an additive to absorb energy at the radiation wavelength ranging from about 360 nm to about 410 nm and to dissipate at least some of the absorbed energy as fluorescence; a co-solvent; and a balance of water. The additive is selected from the group consisting of a compound containing from 3 to 5 fused benzene rings and and a coumarin derivative. The second dye sublimation inkjet ink includes a disperse dye colorant dispersion including a second disperse dye having less absorption at the radiation wavelength than the first disperse dye; a co-solvent; and a balance of water.

Aspects concern an organic metal-halide perovskite precursor including a divalent metal cation, a halide anion, and an alkylamine, wherein the divalent metal cation is connected to a nitrogen atom of the alkylamine via a covalent bond. Further aspects concern a process for the production of the organic metal-halide perovskite precursor and a perovskite ink including the organic metal-halide perovskite precursor and a non-coordinating solvent.

Aspects concern an organic metal-halide perovskite precursor including a divalent metal cation, a halide anion, and an alkylamine, wherein the divalent metal cation is connected to a nitrogen atom of the alkylamine via a covalent bond. Further aspects concern a process for the production of the organic metal-halide perovskite precursor and a perovskite ink including the organic metal-halide perovskite precursor and a non-coordinating solvent.

A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.

A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.

A nano graphene platelet-based conductive ink comprising: (a) nano graphene platelets (preferably un-oxidized or pristine graphene), and (b) a liquid medium in which the nano graphene platelets are dispersed, wherein the nano graphene platelets occupy a proportion of at least 0.001% by volume based on the total ink volume and a process using the same. The ink can also contain a binder or matrix material and/or a surfactant. The ink may further comprise other fillers, such as carbon nanotubes, carbon nano-fibers, metal nano particles, carbon black, conductive organic species, etc. The graphene platelets preferably have an average thickness no greater than 10 nm and more preferably no greater than 1 nm. These inks can be printed to form a range of electrically or thermally conductive components or printed electronic components.

A nano graphene platelet-based conductive ink comprising: (a) nano graphene platelets (preferably un-oxidized or pristine graphene), and (b) a liquid medium in which the nano graphene platelets are dispersed, wherein the nano graphene platelets occupy a proportion of at least 0.001% by volume based on the total ink volume and a process using the same. The ink can also contain a binder or matrix material and/or a surfactant. The ink may further comprise other fillers, such as carbon nanotubes, carbon nano-fibers, metal nano particles, carbon black, conductive organic species, etc. The graphene platelets preferably have an average thickness no greater than 10 nm and more preferably no greater than 1 nm. These inks can be printed to form a range of electrically or thermally conductive components or printed electronic components.