Abstract: Provided is a hole injection layer provided between an anode and a light-emitting layer that includes at least one type of solvent with high polarity and low vapor pressure.

Abstract: A light-emitting element includes a first electrode and a second electrode, a light-emitting layer disposed between the first electrode and the second electrode, and a charge function layer disposed between the light-emitting layer and the second electrode. The light-emitting layer includes a quantum dot layer including a plurality of quantum dots, and the charge function layer includes a nanoparticle layer including a plurality of nanoparticles. An average particle diameter of the plurality of nanoparticles is larger than an average particle diameter of the plurality of quantum dots.

Abstract: A light-emitting element includes the following: a first electrode and a second electrode; a light-emitting layer disposed between the first electrode and the second electrode; and a functional layer disposed between the light-emitting layer and the second electrode, wherein the light-emitting layer has a first quantum dot portion including a first quantum dot, and a second quantum dot portion including a second quantum dot, and disposed between the first quantum dot portion and the functional layer, and one of the first quantum dot portion and the second quantum dot portion contains halogen elements at a predetermined concentration, and the other of the first quantum dot portion and the second quantum dot portion contains no halogen elements or contains halogen elements at a lower concentration than the predetermined concentration.

Abstract: This display device includes a first electrode and a second electrode overlapping each other in a plan view, a light-emitting layer containing quantum dots and overlapping the first electrode and the second electrode in a plan view, a third electrode capable of forming an electrical field between the second electrode and third electrode, and an optical adjustment element overlapping the light-emitting layer in a plan view and having light transmittance that changes in accordance with a potential difference between the second electrode and the third electrode.

Abstract: An electron transport layer provided between a cathode and a light-emitting layer has pores above a vicinity region of a boundary line between a top face of an anode and a side face of a bank, the vicinity region including the boundary line.

Abstract: A light-emitting element is provided with an anode, a light-emitting layer including quantum dots, and a cathode. The light-emitting element includes: an electron transport layer provided between the cathode and the light-emitting layer; and a hole tunneling insulating layer provided between the anode and the light-emitting layer and in contact with the anode and the light-emitting layer.

Abstract: A light-emitting layer of a light-emitting element contains halogen ligands and organic ligands coordinated to each of quantum dots. The light-emitting layer includes: a first region toward a hole-transport layer; and a second region toward an electron-transport layer. In the first region, a concentration of the halogen ligands is higher than a concentration of the organic ligands, and, in the second region, the concentration of the halogen ligands is lower than the concentration of the organic ligands.

Abstract: A light-emitting element includes: an anode; a hole transport layer of a p-type semiconductor; a n-type semiconductor layer containing a Group 13 element; a light-emitting layer containing quantum dots; an electron transport layer; and a cathode, arranged in this order.

Abstract: A display device includes a blue light-emitting layer, a red light-emitting layer disposed so as to overlap the blue light-emitting layer, and a green light-emitting layer disposed so as to overlap the blue light-emitting layer. A light-emitting area of the blue light-emitting layer is greater than a light-emitting area of the red light-emitting layer, and the light-emitting area of the red light-emitting layer is greater than a light-emitting area of the green light-emitting layer.

Abstract: A light-emitting element includes an anode, a light-emitting layer, and a cathode disposed in this order. The light-emitting layer includes a plurality of quantum dots and an insulating material. An average value of a gap between a quantum dot in an end face portion of the light-emitting layer on the anode side and an end face of the light-emitting layer on the anode side is less than an average value of a gap between a quantum dot in an end face portion of the light-emitting layer on the cathode side and an end face of the light-emitting layer on the cathode side. Further, a display device includes a bank separating the light-emitting elements on a subpixel-by-subpixel basis. The light-emitting layer includes a main light-emitting portion including a light-emitting material, and an outer edge portion disposed at a position surrounding the main light-emitting portion in plan view of a substrate and including a deactivation material in which the light-emitting material is deactivated.

Abstract: A quantum dot according to the present application includes a surface including polar planes accounting for an area percentage of 70% or more, or a surface including non-polar planes accounting for an area percentage of 70% or more.

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: a first electrode; a first charge transport layer; a silicide layer containing silicide; a light-emitting layer; and a second electrode, all of which are provided in this order. The first charge transport layer and the light-emitting layer are adjacent to each other via the silicide layer.

Abstract: A display device includes: a light-emitting element including a first electrode and a second electrode overlapping each other in a plan view, and a light-emitting layer placed between the first electrode and the second electrode; a third electrode capable of forming an electrical field between the second electrode and the third electrode; and an optical adjustment element overlapping the light-emitting layer in a plan view and having light transmittance that changes in accordance with a potential difference between the second electrode and the third electrode.

Abstract: A light-emitting element includes: an anode, a light-emitting layer, a layer capable of transporting electrons, and a cathode, all of which are provided in a stated order; and an insulator layer provided in contact with, and at least partially between, the layer capable of transporting the electrons and the cathode, the insulator layer having a relative permittivity of 2 or higher and 50 or lower. The insulator layer includes a plurality of insulator layers shaped into islands and spaced apart from one another. The insulator layers are distributed non-uniformly in plan view.

Abstract: Provided is a technique for improving a luminous efficiency of a light-emitting element including quantum dots in a light-emitting layer by improving a balance between electrons and positive holes in the quantum dot layer. A light-emitting element according to the disclosure includes an anode, a cathode, and a quantum dot layer provided between the anode and the cathode and including a plurality of quantum dots and a vacancy, the vacancy being a region between the plurality of quantum dots. The quantum dot layer includes both the plurality of quantum dots and the vacancy in the quantum dot layer in an entire region of the quantum dot layer in each of all cross sections having a normal line in a direction from the cathode toward the anode.

Abstract: A light-emitting element includes: a first electrode; a second electrode; a light-emitting layer between the first electrode and the second electrode; and a sulfur-atom-fixing material between the first electrode and the second electrode, the sulfur-atom-fixing material being configured to fix sulfur atoms by chemically binding to the sulfur atoms.

Abstract: An LED array includes: a substrate having a depressing-projecting structure formed on a surface of the substrate; a planarization layer formed on the depressing-projecting structure; a plurality of micro LED elements each of which is formed on the planarization layer; and a stray light attenuating groove formed between a pair of adjacent micro LED elements among the plurality of micro LED elements, and extending from toward the pair of micro LED elements to toward the depressing-projecting structure at least part way of the planarization layer.

Abstract: A display device includes: a TFT substrate including a thin film transistor; a light-emitting element including a first electrode and a second electrode overlapping each other in a plan view, and a light-emitting layer placed between the first electrode and the second electrode; a third electrode capable of forming an electrical field between the second electrode and the third electrode; an optical adjustment element overlapping the light-emitting layer in a plan view and having an optical characteristic that changes in accordance with a potential difference between the second electrode and the third electrode; and light scattering bodies included in at least one of the TFT substrate, the light-emitting element, and the optical adjustment element.

Abstract: A light-emitting element includes: a cathode; an anode opposite the cathode; a light-emitting layer between the cathode and the anode; and an electron transport layer between the cathode and the light-emitting layer, the electron transport layer containing either a compound containing a Group IIB element, a Group IVB element, and elemental nitrogen or a compound containing the Group IVB element, a Group VIB element, and elemental boron.