An organic light-emitting device includes a first electrode, a second electrode facing the first electrode, an organic layer between the first electrode and the second electrode and including an emission layer, and at least one of a first layer and a second layer, wherein the first layer is positioned in a path where light generated in the emission layer is transmitted to the outside through the first electrode and the second layer is positioned in a path where the light generated in the emission layer is transmitted to the outside through the second electrode. The first layer and the second layer each include a compound having a certain formula.

To provide an excellent light emitting material. A compound represented by the following general formula is used as the light emitting material. R is a hydrogen atom, a deuterium atom, an aryl group, or a heteroaryl group bonding via a carbon atom, Ar is an aryl group, or a heteroaryl group bonding via a carbon atom, D.sup.1 and D.sup.2 each are a donor group, and at least one is a hetero ring-condensed carbazol-9-yl group.

##STR00001##

A condensed-cyclic compound is represented by Formula 1, and an organic light-emitting diode includes the condensed-cyclic compound. The organic light-emitting diode includes a first electrode, a second electrode facing the first electrode, and an organic layer. The organic layer includes an emission layer and the condensed-cyclic compound. The condensed-cyclic compound can be included in the emission layer as a host, and the emission layer may further include a dopant. ##STR00001##

A compound having a metal coordination complex structure, where the compound is capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature is disclosed. The compound has a first ligand coordinated to a metal. The free-state of the first ligand has a first triplet energy T1 of E.sub.L at 77K, while the compound has a first triplet energy T1 of E at 77K, and the difference in energy (ΔE) between E and E.sub.L is ≤250 meV. The compound has a triplet emission spectrum with a FWHM value of no more than 45 nm. Organic light emitting devices, consumer products, and formulations containing the compounds are also disclosed.

Iridium complexes comprising three different bidentate ligands and their use in OLEDs to enhance the device efficiency and lifetime are disclosed.

A compound is disclosed that has a metal coordination complex structure having at least two ligands coordinated to the metal; wherein the compound has a first substituent R.sup.1 at one of the ligands' periphery; wherein a first distance is defined as the distance between the metal and one of the atoms in R.sup.1 where that atom is the farthest away from the metal among the atoms in R.sup.1; wherein the first distance is also longer than any other atom-to-metal distance between the metal and any other atoms in the compound; and wherein when a sphere having a radius r is defined whose center is at the metal and the radius r is the smallest radius that will allow the sphere to enclose all atoms in the compound that are not part of R.sup.1, the first distance is longer than the radius r by at least 2.9 Å.

The present invention relates to organic electroluminescent devices which comprise mixtures of at least one phosphorescent material and at least two electron-transporting materials.

Disclosed is a novel organometallic compound represented by a following Chemical Formula 1. The organometallic compound acts as a dopant of a light-emitting layer of an organic light-emitting diode. Thus, an operation voltage of the diode is lowered, and luminous efficiency and a lifespan thereof are improved:

##STR00001##

A polycyclic compound and an organic electroluminescence device including the same. The polycyclic compound according to an example embodiment is represented by the following Formula 1.

##STR00001##

wherein in Formula 1, Cy1 is carbonyl-containing five- or six-membered and substituted or unsubstituted cyclic hydrocarbon or substituted or unsubstituted heterocycle, and R.sub.1 to R.sub.4 are each independently a hydrogen atom or a group represented by the following Formula 2 or 3.

##STR00002##

The present invention relates to a novel indole-based compound having excellent hole injection and transport capabilities, light-emitting capabilities, and the like, and an organic electroluminescence device which includes the indole-based compound in one or more organic material layers thereof so as to improve characteristics such as light-emitting efficiency, driving voltage, and lifespan.