The invention relates to heterocyclic compounds which are suitable for use in electronic devices, and to electronic devices, in particular organic electroluminescent devices, containing said compounds.

The present invention relates to a polycyclic aromatic derivative compound that can be used in a variety of organic material layers in an organic light-emitting element, and an organic light-emitting element comprising the polycyclic aromatic derivative compound, the highly efficient and long-life organic light-emitting element having significantly improved light-emitting efficiency by employing the polycyclic aromatic compound as a dopant compound in a light-emitting layer, and an anthracene derivative having a particular structure as a host compound.

An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and an emission layer between the first electrode and the second electrode, wherein the emission layer includes an organometallic compound represented by Formula 1, and the emission layer may show high emission efficiency properties. ##STR00001##

Provided are compounds comprising a first ligand L.sub.A which comprises a first B atom and a first N atom; the first B atom forms exactly three single bonds to three atoms selected from the group consisting of C and N; and one of the three atoms is the first N atom; the first N atom is a ring atom of a first 6-membered ring, and B is not a ring atom of the first 6-membered ring; the first 6-membered ring comprises at least two double bonds in at least one Lewis structural drawing; L.sub.A is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au; and L.sub.A may be joined with other ligands to comprise a bidentate, tridentate, tetradentate, pentadentate, or hexadentate ligand. Also provided are formulations comprising these compounds and OLEDs and related consumer products that utilize these compounds.

The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes.

An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and an emission layer between the first electrode and the second electrode, wherein the emission layer includes an organometallic compound represented by Formula 1, and the emission layer may show high emission efficiency properties.

##STR00001##

The present specification relates to a nitrogen-containing compound, and a color conversion film, a backlight unit and a display apparatus including the same.

The present disclosure relates to an organic electroluminescence device including an organometallic compound represented by Formula 1 or Formula 2 below in an emission layer, to achieve long service life of the organic electroluminescence device.

##STR00001##

An organic light emitting diode (OLED) including at least one emitting material layer (EML) disposed two electrodes and comprising triazine-based delayed fluorescent material and boron-dipyrromethene-based fluorescent material and an organic light emitting device including the OLED is disclosed. The triazine-based delayed fluorescent material and the boron-dipyrromethene-based fluorescent material may be included in an identical EML or in adjacently disposed EMLs. The OLED can lower its driving voltage and improve its luminous efficiency by adjusting energy levels of the delayed fluorescent material and the fluorescent material.

An aromatic compound which improves emission efficiency and an organic electroluminescence device including the same are provided. The organic electroluminescence device includes: a first electrode; a second electrode opposite to the first electrode; and a plurality of organic layers between the first electrode and the second electrode, where at least one organic layer among the plurality of organic layers includes the aromatic compound. The aromatic compound is represented by Formula 1 below.

##STR00001##