The present disclosure relates to an organic electroluminescent device including a first electrode; a second electrode; and at least one light-emitting layer(s) positioned between the first electrode and the second electrode, and wherein the light-emitting layer includes a host comprising a compound represented by formula 1 and a compound represented by formula 2, and a dopant comprising a compound represented by formula 3, so that the present disclosure may provide an organic electroluminescent device having high efficiency and long lifespan property.

Provided are compounds of Formula Ir(L.sub.A).sub.m(L.sub.C).sub.n or Pt(L.sub.A)(L.sub.B), and also provided are OLED devices using those compounds.

Ligands with fused spirocyclic substitutions and metal complexes formed with such ligands and having improved performance in OLED applications are disclosed.

An OLED including an organic layer that contains metal complex compounds that are useful as a phosphorescent emitter is disclosed. The metal complex compounds include ligands that incorporate fluorinated side chains and has at least one substituent R selected from the group consisting of partially fluorinated alkyl, partially fluorinated cycloalkyl, and combinations thereof, wherein R is directly bonded to an aromatic ring, In the compound, C having an F attached thereto is separated by at least one carbon atom from the aromatic ring.

A condensed cyclic compound represented by Formula 1: ##STR00001## wherein, in Formula 1, A.sub.1, D.sub.1, and R.sub.11 to R.sub.14 are the same as described in the specification.

A compound having a first ligand L.sub.A having the Formula:

##STR00001##

Formula I is disclosed, wherein rings A is a 5- or 6-membered carbocyclic or heterocyclic ring; wherein R.sup.A and R.sup.B each independently represent mono to the possible maximum number of substitution, or no substitution; wherein Z.sup.1 is carbon or nitrogen; wherein each R.sup.A and R.sup.B is independently selected from the group consisting of hydrogen, deuterium, halide, 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, and combinations thereof; wherein any two substituents are optionally joined or fused into a ring; wherein X.sup.1 to X.sup.4 each independently represent a carbon or nitrogen; wherein at least one of X.sup.1 to X.sup.4 is nitrogen; wherein the ligand L.sub.A is coordinated to a metal M; wherein the metal M can be coordinated to other ligands; and wherein the ligand L.sub.A is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand.

Provided are organometallic compounds comprising a ligand with fused aromatic structures according to Formula I as described herein and their various uses including as emitters in devices and related electronic devices. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.

The present invention relates to phosphorous host materials and an organic electroluminescent device comprising the same. By using the phosphorous host material of the present invention, an organic electroluminescent device having significantly improved operational lifespan can be produced.

An OLED including an anode, a cathode, and an organic layer between the anode and the cathode, where the organic layer includes a compound having the formula [L.sub.A].sub.3-nIr[L.sub.B].sub.n is disclosed. In the formula, L.sub.A is ##STR00001##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures:

##STR00001## ##STR00002##