Abstract: Provided are a near-infrared light-emitting diode including an osmium (Os)-containing organometallic compound and a device including the near-infrared light-emitting diode. The near-infrared light-emitting diode includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, where the organic layer includes a near-infrared light-emitting layer, the near-infrared light-emitting layer includes the osmium (Os)-containing organometallic compound.

Abstract: In a light-emitting device, an electron transport layer includes a first compound, the first compound includes a linker of a C6-C60 aryl group and an aliphatic hydrocarbon moiety represented by Formula 1-1, two or more triazine moieties are connected to the linker of the C6-C60 aryl group, in the linker of the C6-C60 aryl group, the triazine moieties are located at positions adjacent to each other, or at positions where one hydrogen atom is present between the triazine moieties, and a molecular weight of the first compound is less than 1,000:

Abstract: A light emitting diode of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode and having a first refractive index, a second hole transport layer disposed adjacent to the emission layer and having a second refractive index, and a third hole transport layer disposed between the first hole transport layer and the second hole transport layer and having a third refractive index which is greater than each of the first refractive index and the second refractive index, thereby showing high light extraction efficiency and high emission efficiency properties.

Abstract: A light emitting diode of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode and having a first refractive index, a second hole transport layer disposed adjacent to the emission layer and having a second refractive index, and a third hole transport layer disposed between the first hole transport layer and the second hole transport layer and having a third refractive index which is greater than each of the first refractive index and the second refractive index, thereby showing high light extraction efficiency and high emission efficiency properties.

Abstract: A display device including a base layer including a first pixel area configured to emit a first light therefrom and a second pixel area configured to emit a second light therefrom, a first electrode on the base layer, a second electrode on the first electrode and facing the first electrode, first light emitting stacks between the first and second electrodes and in the first pixel area, a first charge generation layer between the first light emitting stacks, second light emitting stacks between the first and second electrodes and in the second pixel area, and a second charge generation layer between the second light emitting stacks. The first charge generation layer includes a first metal, the second charge generation layer includes a second metal different from the first metal, and the second metal has a work function equal to or greater than 1.7 eV and equal to or smaller than 3.2 eV.

Abstract: Embodiments provide a cyclic compound, a light-emitting device including the cyclic compound, and an electronic apparatus including the light-emitting device. The light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer between the first electrode and the second electrode and including an emission layer; and at least one cyclic compound. The cyclic compound is represented by Formula 1: The description of Formula 1 is provided in the specification.

Abstract: A light emitting element includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the hole transport region includes a first hole transport layer disposed adjacent to the first electrode and including a first amine compound having a first refractive index, a second hole transport layer disposed between the first hole transport layer and the emission layer, and including a second amine compound having a second refractive index greater than the first refractive index, and a third hole transport layer disposed between the second hole transport layer and the emission layer, and including a third amine compound having a third refractive index less than the second refractive index, thereby having high luminous efficiency.

Abstract: A light emitting diode of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode and having a first refractive index, a second hole transport layer disposed adjacent to the emission layer and having a second refractive index, and a third hole transport layer disposed between the first hole transport layer and the second hole transport layer and having a third refractive index which is greater than each of the first refractive index and the second refractive index, thereby showing high light extraction efficiency and high emission efficiency properties.

Abstract: A light-emitting element includes a first electrode, a second electrode, and at least one functional layer disposed between the first electrode and the second electrode and including an amine compound represented by Formula 1.

Abstract: A light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer disposed between the first electrode and the second electrode. The interlayer includes an emission layer, and a distributed Bragg reflector (DBR) layer in which a first layer and a second layer are alternately stacked. A refractive index of the first layer is different from a refractive index of the second layer.

Abstract: A light emitting diode of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode and having a first refractive index, a second hole transport layer disposed adjacent to the emission layer and having a second refractive index, and a third hole transport layer disposed between the first hole transport layer and the second hole transport layer and having a third refractive index which is greater than each of the first refractive index and the second refractive index, thereby showing high light extraction efficiency and high emission efficiency properties.

Abstract: A heterocyclic compound and an organic light-emitting device including the heterocyclic compound, the heterocyclic compound being represented by Formula 1:

Abstract: Provided are a near-infrared light-emitting diode including an osmium (Os)-containing organometallic compound and a device including the near-infrared light-emitting diode. The near-infrared light-emitting diode includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, where the organic layer includes a near-infrared light-emitting layer, the near-infrared light-emitting layer includes the osmium (Os)-containing organometallic compound.

Abstract: Provided are an organic light-emitting device, an apparatus including the same, and an organometallic compound represented by Formula 1. The organic light-emitting device includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode and including an emission layer. The organic layer includes an organometallic compound represented by Formula 1.

Abstract: Provided are an organic light-emitting device, an apparatus including the organic light-emitting device, and an organometallic compound represented by Formula 1. The organic light-emitting device includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode and including an emission layer, wherein: the organic layer includes the organometallic compound represented by Formula 1.

Abstract: A polycyclic compound and an organic light-emitting device including the same are provided.

Abstract: A polycyclic compound and an organic light-emitting device including the same are provided.

Abstract: A heterocyclic compound and an organic light-emitting device including the heterocyclic compound, the heterocyclic compound being represented by Formula 1: