Abstract: A first ligand containing one coordinating functional group allowing coordination to a first QD in a first EML patterned region of a first QD film is exchanged with a second ligand containing at least one kind of at least two coordinating functional groups allowing coordination to the first QD, the first QD film in a region other than the first EML patterned region is washed away and removed with a rinse liquid, and thus, the first QD film is patterned.

Abstract: A quantum-dot-containing film-H includes: a plurality of QDs; and a ligand, wherein the ligand is a monomer that has: at least two coordinating functional groups of at least one species; and at least one polar bonding group of at least one species at a site other than a site at which the ligand is coordinated to the plurality of QDs.

Abstract: A method for manufacturing an EL element, includes: a first quantum dot layer forming step of forming a quantum dot layer containing first quantum dots; a first quantum dot layer coating step of exposing a first portion included in the first quantum dot layer, and coating a second portion included in the first quantum dot layer, the first quantum dot layer coating step including: a photoresist layer forming step; and a photoresist layer patterning step; a solution supplying step of applying or spraying a solution only to or on the first portion, the solution containing first molecules each having a plurality of coordinating functional groups coordinatable with the first quantum dots and; a removing step of removing the second portion of the first quantum dot layer and the patterned photoresist layer, such that the first portion of the first quantum dot layer forms a first light-emitting layer.

Abstract: A light-emitting element includes, between an anode electrode and a cathode electrode, a first nanoparticle layer including first nanoparticles and a second nanoparticle layer disposed to be in contact with the first nanoparticle layer and including second nanoparticles, and includes at an interface between the first nanoparticle layer and the second nanoparticle layer, a ligand including a first coordinating functional group for coordinating to the first nanoparticles and a second coordinating functional group for coordinating to the second nanoparticles.

Abstract: A light-emitting element includes a light-emitting layer, wherein the light-emitting layer includes a quantum dot, a halogen element, and a coordination compound that can coordinate to the quantum dot, the coordination compound includes a compound having one or more and n or less (where n is a plural number) carbon-hydrogen bonds, or a compound having n chain structures with different elements bonded at any two coordination positions of an element that can substantially have a coordination number of four or greater, and a mass ratio between the coordination compound and the quantum dot is 0.5 or less.

Abstract: A light-emitting element includes an anode electrode, a cathode electrode, and a QD layer provided between the anode electrode and the cathode electrode, the QD layer containing the QDs. The QDs are AgInxGa1-xSySe1-y-based or ZnAgInxGa1-xSySe1-y-based Cd-free QDs (0?x<1, 0?y?1) and exhibit fluorescence characteristics having a fluorescent half width of 45 nm or less and a fluorescence quantum yield of 35% or more in a green wavelength region to a red wavelength region.

Abstract: A light-emitting element includes a cathode electrode; an anode electrode an EML disposed between the cathode electrode and the anode electrode; and an ETL, disposed between the cathode electrode and the EML. The ETL includes a plurality of inorganic nanoparticles having carrier transport properties and a ligand. The ligand is a monomer including at least two coordination functional groups of at least one type for coordinating to the plurality of inorganic nanoparticles.

Abstract: A light-emitting element according to the disclosure includes, in the recited order, an anode, a blue light-emitting layer, an electron transport layer and a cathode, wherein the electron transport layer includes a nanoparticle containing a metal oxide, and a ligand containing a thiol group.

Abstract: A method of exchanging ligands includes a step of mixing a QD composition in which intermediate ligands and QDs are dissolved in a water solvent with a target-ligand-substituting solvent in which target ligands are dissolved, to replace the intermediate ligands with the target ligands. The target ligands do not dissolve in the water solvent and are soluble in different solvents depending on whether or not the target ligands are coordinated to the QDs, and the target-ligand-substituting solvent dissolves the target ligands not coordinated to the QDs and does not dissolve the target ligands coordinated to the QDs.

Abstract: A quantum dot (QD) dispersion solution includes QD phosphor particles, ligands, and a solvent. Each ligand includes a thiol group and at least one functional group of ester groups and ether groups. The solvent is propylene glycol monomethyl ether acetate.

Abstract: The display device includes light-emitting elements. Each of light-emitting elements includes a light-emitting layer containing quantum dots each including a core and a shell larger in energy gap than the core; and a hole-transport layer, adjacent to the light-emitting layer, containing a p-type doping material and an organic hole-transport material. The plurality of light-emitting elements includes: a first light-emitting element including a first light-emitting layer as the light-emitting layer; a second light-emitting element including a second light-emitting layer as the light-emitting layer; and a third light-emitting element including a third light-emitting layer as the light-emitting layer. A peak wavelength of light emitted by the first light-emitting layer is longer than a peak wavelength of light emitted by the second light-emitting layer. The peak wavelength of the light emitted by the second light-emitting layer is longer than a peak wavelength of light emitted by the third light-emitting layer.