Abstract: A light-emitting element includes an anode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer, and a cathode, in this order. The electron transport layer includes a particulate metal oxide and a conductive resin that disperses the metal oxide.

Abstract: A light-emitting layer included in a light-emitting element according to the disclosure contains a plurality of red quantum dots that emit red light, a plurality of green quantum dots that emit green light, and a plurality of blue quantum dots that emit blue light. The surface-to-surface distance between the red quantum dots adjacent to each other is longer than the surface-to-surface distance between the green quantum dots adjacent to each other, and the surface-to-surface distance between the green quantum dots adjacent to each other is longer than the surface-to-surface distance between the blue quantum dots adjacent to each other.

Abstract: A light-emitting element contains negative ions and positive ions, and includes a solid ionic layer, a layer containing quantum dots, and a cathode electrode and an anode electrode. The ionic layer includes a p-type doped region on the anode electrode side containing the negative ions in a higher quantity than the positive ions, an n-type doped region on the cathode electrode side containing the positive ions in a higher quantity than the negative ions, and a junction region between the p-type doped region and the n-type doped region. The layer containing the quantum dots is adjacent to the junction region. Alternatively, the quantum dots are contained in the junction region. Alternatively, the quantum dots are adjacent to the junction region.

Abstract: A QD particle dispersion contains a surface modification compound that protects a surface of QD phosphor particles dispersed in a solvent. The surface modification compound includes a heteroatom-containing functional group and a chain-type saturated hydrocarbon group. The QD particle dispersion is configured such that the absolute value of a difference between the surface free energy of an underlayer that provides a foundation for forming a QD layer in the light-emitting element and the surface free energy of the QD layer is 5 mN/m or less.

Abstract: The electroluminescent element includes a QD layer and an electron transport layers. QD phosphor particles contained in the QD layer are nanocrystals containing zinc and selenium, or zinc, selenium, and sulfur. A fluorescent half width of the QD phosphor particles is 25 nm or less, and a fluorescent peak wavelength of the QD phosphor particles is 410 nm or more and 470 nm or less. The QD layer contains a surface modifier that protects surfaces of the quantum dots, and a weight ratio of the surface modifier to the QD phosphor particles is 0.115 and more and 0.207 or less.

Abstract: A light-emitting element includes: an anode; a cathode; and a light-emitting layer between the anode and the cathode, wherein the light-emitting layer contains quantum dots and ligands, the ligands are a polymer including at least two repeating units, and each repeating unit includes, at an end of at least one side chain thereof, a modified functional group coordinated to any one of the quantum dots.

Abstract: A light-emitting element includes an anode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer, and a cathode, in this order. The electron transport layer includes a particulate metal oxide and a conductive resin that disperses the metal oxide.

Abstract: Provided is a light-emitting device including a light-emitting element including a first electrode, a second electrode, and a quantum dot layer between the first electrode and the second electrode, wherein, in the quantum dot layer, quantum dots each including a core, a shell covering the core, and a ligand coordinated with a surface of the shell and having defect compensation properties are layered.

Abstract: A QD particle dispersion contains a surface modification compound that protects a surface of QD phosphor particles dispersed in a solvent. The surface modification compound includes a heteroatom-containing functional group and a chain-type saturated hydrocarbon group. The QD particle dispersion is configured such that the absolute value of a difference between the surface free energy of an underlayer that provides a foundation for forming a QD layer in the light-emitting element and the surface free energy of the QD layer is 5 mN/m or less.

Abstract: A phosphor containing particle including a core portion which is a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a shell portion which is a matter in a form of a layer of resin which includes a constitutional unit derived from an ionic liquid and coats at least a portion of the core portion, and a phosphor containing particle including a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a metal oxide layer coating at least a portion of the particulate matter of resin. A light emitting device including a light source and a wavelength converter in which phosphor containing particles are dispersed in a translucent medium, and a phosphor containing sheet in which phosphor containing particles are dispersed in a sheet-shaped translucent medium.

Abstract: A phosphor containing particle including a core portion which is a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a shell portion which is a matter in a form of a layer of resin which includes a constitutional unit derived from an ionic liquid and coats at least a portion of the core portion, and a phosphor containing particle including a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a metal oxide layer coating at least a portion of the particulate matter of resin. A light emitting device including a light source and a wavelength converter in which phosphor containing particles are dispersed in a translucent medium, and a phosphor containing sheet in which phosphor containing particles are dispersed in a sheet-shaped translucent medium.

Abstract: A phosphor containing particle including a core portion which is a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a shell portion which is a matter in a form of a layer of resin which includes a constitutional unit derived from an ionic liquid and coats at least a portion of the core portion, and a phosphor containing particle including a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a metal oxide layer coating at least a portion of the particulate matter of resin. A light emitting device including a light source and a wavelength converter in which phosphor containing particles are dispersed in a translucent medium, and a phosphor containing sheet in which phosphor containing particles are dispersed in a sheet-shaped translucent medium.

Abstract: The present invention facilitates production of a wavelength conversion member which is produced with use of a phosphor element containing a semiconductor nanoparticle phosphor. A phosphor element (10) includes semiconductor nanoparticle phosphors (11) dispersed in a matrix (12). An encapsulation body (13) has a thickness L and an inner diameter R which have therebetween a ratio of not more than 1, the phosphor element (10) has a particle size of 1 ?m to 30 ?m, and the phosphor element (10) is sealed in the wavelength conversion member while having a weight of not more than 0.8 g with respect to 1 g of a sealing material.

Abstract: A light-emitting device includes a light-emitting element configured to emit excitation light, and a phosphor layer in which phosphor particles are dispersed so as to emit fluorescence in response to the excitation light. The phosphor layer includes a constitutional unit derived from an ionic liquid having a polymerizable functional group. The light-emitting device further includes a protective layer that seals the light-emitting element therein.

Abstract: A phosphor containing particle including a core portion which is a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a shell portion which is a matter in a form of a layer of resin which includes a constitutional unit derived from an ionic liquid and coats at least a portion of the core portion, and a phosphor containing particle including a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a metal oxide layer coating at least a portion of the particulate matter of resin. A light emitting device including a light source and a wavelength converter in which phosphor containing particles are dispersed in a translucent medium, and a phosphor containing sheet in which phosphor containing particles are dispersed in a sheet-shaped translucent medium.

Abstract: A light-emitting device includes a light-emitting element configured to emit excitation light, and a phosphor layer in which phosphor particles are dispersed so as to emit fluorescence in response to the excitation light. The phosphor layer includes a constitutional unit derived from an ionic liquid having a polymerizable functional group. The light-emitting device further includes a protective layer that seals the light-emitting element therein.

Abstract: A wavelength conversion member includes a light-transmitting medium and phosphor-containing particles dispersed in the light-transmitting medium and including a resin and a semiconductor nanoparticle phosphor dispersed in the resin, wherein the phosphor-containing particles have a particle size that is equal to or larger than a particle size of the semiconductor nanoparticle phosphor and that is equal to or smaller than a minimum thickness of the wavelength conversion member.