The present specification relates to a heterocyclic compound represented by Chemical Formula 1 and an organic light emitting device comprising the same.

An organic electroluminescence device includes a first electrode, a second electrode, and an emission layer between the first electrode and the second electrode. The emission layer includes a first host and a second host different from the first host, thereby achieving high efficiency and a long device life.

Disclosed are electroluminescent devices that comprise organic layers that contain certain organic compounds containing one ore more pyrimidine moieties. The organic compounds containing one ore more pyrimidine moieties are suitable components of blue-emitting, durable, organo-electroluminescent layers. The electroluminescent devices may be employed for full color display panels in for example mobile phones, televisions and personal computer screens.

A light-emitting device with low driving voltage and favorable reliability is provided. The light-emitting device includes an electron-injection layer between a cathode and a light-emitting layer. The electron-injection layer is a mixed film of a metal and an organic compound having a function of interacting with the metal as a tridentate or tetradentate ligand, and the metal atom and the organic compound form SOMO.

Disclosed are electroluminescent devices that comprise organic layers that contain certain organic compounds containing one ore more pyrimidine moieties. The organic compounds containing one ore more pyrimidine moieties are suitable components of blue-emitting, durable, organo-electroluminescent layers. The electroluminescent devices may be employed for full color display panels in for example mobile phones, televisions and personal computer screens.

Thermally activated delayed fluorescent compounds and uses thereof are described. The thermally activated delayed fluorescent compounds are an analogues of 9,10-dihydro-9,9-dimethylacridine compounds.

A light emitting device having an anode, a cathode, a first organic layer disposed between the anode and the cathode and a second organic layer disposed between the anode and the cathode is provided. The first organic layer is a layer containing a compound (T) in which the absolute value of the difference between the energy level at the lowest triplet excited state and the energy level at the lowest singlet excited state is 0.5 eV or less and not containing a phosphorescent metal complex. The second organic layer is a layer containing a crosslinked body of a polymer compound containing a crosslink constitutional unit and the energy level at the lowest triplet excited state of the polymer compound is 2.25 eV or more.

The present application provides an organic electroluminescent device and a manufacturing method thereof. A host material of a light-emitting layer of the organic electroluminescent device is co-evaporated by a donor host material and a acceptor host material in a same evaporation source to form an exciplex, which solves the technical problems such as low luminous efficiency, short service life or complicated operation process of the organic electroluminescent device in the prior art. The organic electroluminescent device according to the present application includes an anode, a cathode and a light-emitting layer disposed between the anode and the cathode, a host material of the light-emitting layer is formed by premixing a donor host material and a acceptor host material, the donor host material and the acceptor host material are co-evaporated in a same evaporation source to form an exciplex, and the host material is doped with a guest material.

Small molecule compounds having aggregation-induced emission (AIE) characteristics. The compounds include organic, aromatic salts having anion-π.sup.+ interactions. In some embodiments, the anion-π.sup.+ interactions can include heavy-atom-anion-π.sup.+ interactions. The heavy atom anions can include bromine or iodide, for example. The compounds can be water-soluble. The compounds can be useful as probes for bioimaging, as room temperature luminogens for electroluminescent devices, and white organic light-emitting applications.

The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds as host materials, it is possible to provide an organic electroluminescent device having lower driving voltage, higher luminous efficiency, higher power efficiency, and/or better lifetime properties, compared to conventional organic electroluminescent devices.