An organic light emitting diode includes a first electrode; a second electrode facing the first electrode; and an emitting material layer including a first compound and a second compound and positioned between the first and second electrodes. An energy level of the first compound and an energy level of the second compound satisfy a pre-determined condition. Further, an organic light emitting device may include the organic light emitting diode.

An organic EL display panel including: a substrate; pixel electrodes that are arrayed in a matrix above the substrate; first organic functional layers that are on or above the pixel electrodes in one-to-one correspondence with the pixel electrodes, the first organic functional layers spaced apart from one another; a second organic functional layer that continuously covers the first organic functional layers; and a counter electrode that opposes the pixel electrodes and covers the second organic functional layer. In the organic EL display panel, the first organic functional layers each include a hole injection layer, and the second organic functional layer has greater electric resistance than each of the first organic functional layers and has a portion extending into an absence region, the absence region being a space between adjacent ones of the first organic functional layers.

A light emitting element (10) of the present disclosure includes at least a first electrode (31), a second electrode (32), and a light emitting unit (30) sandwiched between the first electrode (31) and the second electrode (32), the light emitting unit 30 at least includes at least two light emitting layers (33a, 33b) that emit different colors and an intermediate layer (33d) located between the two light emitting layers (33a, 33b), the intermediate layer (33d) includes a first organic material (33e) having hole transport properties and a second organic material 33f having electron transport properties, and when a band gap energy of the first organic material (33e) is BGHTM and a band gap energy of a material having a maximum band gap energy among materials constituting two adjacent light emitting layers (33a, 33b) is BGmax, BGHTM-BGmax ≥ 0.2 eV is satisfied.

An organic light emitting device includes a first light-emitting layer between an anode and a cathode, the first light-emitting layer including a first light-emitting part and a second light-emitting part, a second light-emitting layer spaced apart from the first light-emitting layer and including a third light-emitting part and a fourth light-emitting part, the third light-emitting part overlapping the first light-emitting part and not overlapping the second light-emitting part, and the fourth light-emitting part not overlapping either of the first light-emitting part and the second light-emitting part, an intermediate layer between the first light-emitting layer and the second light-emitting layer, a hole transport region to inject/transport a hole into the first light-emitting part, the second light-emitting part, and the fourth light-emitting part, and an electron transport region to inject/transport an electron into the second light-emitting part, the third light-emitting part, and the fourth light-emitting part.

The present disclosure relates to an emitting compound and organic light emitting device including the same, more specifically, relates to an emitting compound of following and an organic light emitting diode and an organic light emitting device each including the emitting compound.

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A display device is disclosed. The display device includes: a substrate including a first sub-pixel and a second sub-pixel; a first electrode in each of the first sub-pixel and the second sub-pixel; a third electrode in each of the first sub-pixel and the second sub-pixel; a second electrode between the first electrode and the third electrode; a first light-emitting layer between the first electrode and the second electrode, wherein the first light-emitting layer emits light of a first color; a second light-emitting layer between the second electrode and the third electrode, wherein the second light-emitting layer is configured to emit mixed light of second and third colors; and a color filter including a first color filter corresponding to the first sub-pixel and a second color filter corresponding to the second sub-pixel, wherein the first sub-pixel and the second sub-pixel each are configured to emit light of three colors.

The present disclosure provides an organic light emitting device that includes a first electrode, a second electrode, and two or more light emitting units provided between the first electrode and the second electrode, wherein a charge generation layer is provided between, among the light emitting units, two light emitting units that are adjacent to each other, an electron transport layer is provided between the charge generation layer and the light emitting unit placed closer to the first electrode of the two adjacent light emitting units, and the electron transport layer includes a first electron transport layer doped with an n-type dopant, and a second electron transport layer doped with a metal salt, metal oxide or organic metal salt.

The present disclosure provides an organic compound represented by the Chemical Formula 1 and an organic light emitting element including the same. Specifically, there may be provided an organic light emitting element having high efficiency or long lifespan by including a first electrode, a second electrode, and an organic material layer positioned therebetween, where the organic material layer includes an organic compound represented by the Chemical Formula 1.

Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.170 and a chromaticity y of greater than or equal to 0.020 and less than 0.060.

An object of one embodiment of the present invention is to provide a multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance, a separation layer containing a substance having a hole-transport property and a substance having an electron-transport property, and a second light-emitting layer containing two kinds of organic compounds that form an exciplex and a substance that can convert triplet excitation energy into luminescence. Note that a light-emitting element in which light emitted from the first light-emitting layer has an emission spectrum peak on the shorter wavelength side than an emission spectrum peak of the second light-emitting layer is more effective.