A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the interlayer may include a layer including a metal oxide, and a surface of the layer including a metal oxide is an organic acid-treated surface.

A display device includes a first light emitting element, a second light emitting element, and a third light emitting element that are disposed on a substrate and emitting light of different colors, respectively; a first insulation layer disposed on the first light emitting element, the second light emitting element, and the third light emitting element, and including at least one opening; and a second insulation layer disposed on the first insulation layer, and disposed in the at least one opening, wherein a refractive index of the second insulation layer is higher than a refractive index of the first insulation layer, and the at least one opening overlaps at least one of the first light emitting element, the second light emitting element, and the third light emitting element in a plan view, and does not overlap at least another one in a plan view.

A display device in one example includes a substrate composed of a first subpixel, a second subpixel, a third subpixel and a fourth subpixel. The substrate has a light emission area and a non-light emission area for each of the first to fourth subpixels. The display device further includes a thin film transistor disposed in each of the non-light emission areas of the substrate, a protective layer disposed on the thin film transistors, a color filter disposed on the protective layer and disposed in a light emission area of each of the first to third subpixels, an optical filter layer disposed on the color filter and including first to third absorbent materials, and a light emitting element disposed on the optical filter layer.

A display panel includes: a substrate including a first display area, a second display area, and a peripheral area; a first pixel circuit at the first display area and a first display element connected to the first pixel circuit; a second display element at the second display area; a second pixel circuit at on the peripheral area; a connection line between the substrate and the second display element and connecting the second display element to the second pixel circuit; and a connection portion on a different layer from the connection line and connected to the second display element, wherein the second display element includes a second pixel electrode, wherein the second pixel electrode is on a same layer as the connection portion and covers at least a portion of the connection portion.

The present application provides a display panel and a display device. The display panel includes: a cathode inhibition layer disposed on a side of the pixel definition layer and between light-emitting units, a cathode disposed on a side of a light-emitting layer away from a substrate, and a color filter layer disposed on the cathode away from the substrate, wherein a thickness of the cathode on the cathode inhibition layer is less than a thickness of the cathode on the light-emitting unit. A light shielding portion of the color filter layer includes a light-permeable aperture configured corresponding to the cathode inhibition layer, and a light transmittance of a light-permeable material in the light-permeable aperture is greater than a light transmittance of the light shielding portion.

A display device includes a base substrate, a pixel defining film which is disposed on the base substrate and in which an opening is defined, a first electrode disposed on the base substrate and including a first surface facing the base substrate and a second surface opposite to the first surface and exposed in the opening, a light-emitting layer disposed on the first electrode in the opening, a hole transport region disposed between the first electrode and the light-emitting layer, an electron transport region disposed on the light-emitting layer, a second electrode disposed on the electron transport region and disposed extending above the pixel defining film, and a first auxiliary electrode disposed on the second electrode not to overlap the light-emitting layer and having a lower resistivity than a resistivity of the second electrode.

A display device includes a first light emitting element, a second light emitting element, and a third light emitting element that are disposed on a substrate and emitting light of different colors, respectively; a first insulation layer disposed on the first light emitting element, the second light emitting element, and the third light emitting element, and including at least one opening; and a second insulation layer disposed on the first insulation layer, and disposed in the at least one opening, wherein a refractive index of the second insulation layer is higher than a refractive index of the first insulation layer, and the at least one opening overlaps at least one of the first light emitting element, the second light emitting element, and the third light emitting element in a plan view, and does not overlap at least another one in a plan view.

A display panel includes: a substrate including a first display area and a second display area including a transmission area; a plurality of first display elements arranged in the first display area; a plurality of second display elements arranged in the second display area, the plurality of second display elements each including a pixel electrode and an emission layer; and a pixel defining layer defining an emission area by an opening exposing a central portion of the pixel electrode of each of the plurality of second display elements. In at least one of the plurality of second display elements, a first center of the emission layer and a second center of the emission area do not coincide with each other in a plan view.

A display panel and a mobile terminal are disclosed. A light-emitting device layer of the display panel includes a plurality of first light-emitting units, a plurality of first compensation layers disposed corresponding to the first light-emitting units. The first compensation layers are located on at least one side of the first light-emitting units. A hole transport rate of the first compensation layers is greater than a hole transport rate of a hole transport layer, and/or an electron transport rate of the first compensation layers is greater than an electron transport rate of an electron transport layer.

Provided is a display device comprising a substrate; a plurality of transistors disposed on the substrate; a first pixel electrode, a second pixel electrode, and a third pixel electrode respectively connected to the transistors; a first emission layer disposed to overlap the first pixel electrode, a second emission layer disposed to overlap the second pixel electrode, and a third emission layer disposed to overlap the third pixel electrode; and a common electrode disposed on the first emission layer, the second emission layer, and the third emission layer, wherein the first pixel electrode includes a first layer, and a second layer disposed on the first layer and including a Ga-doped ITO.