Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1,2-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.

Provided are a compound of Formula 1 and an organic electric element including a first electrode, a second electrode, and an organic material layer between the first and the second electrodes, where the organic material layer contains the compound of Formula 1 and improves luminous efficiency, stability, and life span of the element.

The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound of the present invention has high luminous efficiency, and thus can be used as a host in a light-emitting layer; and an organic electroluminescent device comprising the organic electroluminescent compounds of the present invention has long operating lifespan, provides improved current efficiency and power efficiency, and gives colors having high purity.

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

An organic light-emitting device includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer, wherein the organic layer includes a first compound represented by Formula 1, a second compound represented by Formula 2, and a third compound represented by one of Formulae 3-1 to 3-4. The organic light-emitting device may have high efficiency and a long lifespan.

An organometallic compound represented by Formula 1:
M(L.sub.1).sub.n1(L.sub.2).sub.n2Formula 1 wherein, Formula 1, M is a transition metal, L.sub.1 is a ligand represented by Formula 2 as provided herein, L.sub.2 is a ligand represented by Formula 3 as provided herein, and n1 and n2 are each independently 1 or 2.

The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound of the present invention has high luminous efficiency, and thus can be used as a host in a light-emitting layer; and an organic electroluminescent device comprising the organic electroluminescent compounds of the present invention has long operating lifespan, provides improved current efficiency and power efficiency, and gives colors having high purity.

Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1,2-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.

A compound having a structure of Formula I:

##STR00001##

is provided. In the structure of Formula I, each one of X.sup.1 to X.sup.16 is independently CR.sup.X or N; each R.sup.X and R are independently selected from the group consisting of hydrogen, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, carbazole, azacarbazole, dibenzofuran, dibenzothiophene, dibenzoselenophene, azadibenzofuran, azadibenzothiophene, azadibenzoselenophene, triphenylene, azatriphenylene, and combinations thereof; and any adjacent R.sup.X can join to form fused or unfused rings. Formulations and devices, such as an OLEDs, that include the compound containing a structure of Formula I are also described.

Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1,2-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.