An organometallic compound represented by Formula 1:
M(L.sub.1).sub.n1(L.sub.2).sub.n2  Formula 1
wherein M, L.sub.1, L.sub.2, n1, and n2 are the same as described in the specification.

An organic electroluminescence device includes a first electrode, a second electrode, and an emission layer between the first electrode and the second electrode, wherein the emission layer includes a compound represented by Formula 1 below. Embodiments of the present disclosure exhibit improved emission efficiency and long life characteristics: ##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.

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##

A compound comprising a first ligand L.sub.A of Formula I,

##STR00001##

is provided. In addition, C.sup.1 and C.sup.2 are joined to a structure of Formula II,

##STR00002##

In the first ligand, C.sup.1 and C.sup.2 are carbon atoms; K is selected from the group consisting of a direct bond, O, S, N(R.sup.α), P(R.sup.α), B(R.sup.α), C(R.sup.α)(R.sup.β), and Si(R.sup.α)(R.sup.β); each of Y.sup.1 and Y.sup.2 is O, S, Se, NR, CR′R″, SiR′R″, GeR′R″, BR′, BR′R″, or PR′; Z is selected from the group consisting of N, CR′, SiR′, and GeR′; moiety B is a monocyclic ring or a fused polycyclic ring structure; each R.sup.α, R.sup.β, R.sup.A, R.sup.B, R, R′, and R″ is hydrogen or a General Substituent; the first ligand is coordinated to a metal M; and any two of R.sup.A, R.sup.B, R, R′ and R″ can be joined or fused to form a ring. Formulations, OLEDs, and consumer products containing the compound are also provided.

The present application belongs to the technical field of organic materials and provides a nitrogen-containing compound, an electronic component, and an electronic device. The nitrogen-containing compound has a structure shown in Chemical formula 1: ##STR00001##

The present disclosure relates to organic electroluminescent compounds and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present disclosure may be comprised in a light-emitting layer or an electron buffer layer, and is effective to produce an organic electroluminescent device having low driving voltage, excellent current and power efficiencies, and significantly improved operative lifespan.

Provided are compounds of Formula (I). Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

##STR00001##

A novel compound is disclosed which includes a ligand L.sub.A of Formula II,

##STR00001##

wherein: ring B is independently a 5-membered or 6-membered carbocyclic or heterocyclic ring; X.sup.1 to X.sup.4 are each independently selected from the group consisting of C, N, and CR; at least two adjacent ones of X.sup.1, X.sup.2, X.sup.3, and X.sup.4 are CR and fused into a five or six-membered aromatic ring R.sup.3 represents zero, mono, or up to a maximum allowed substitutions to its associated ring; each R, R.sup.1, and R.sup.3 is independently hydrogen or a General Substituent defined herein; R.sup.2 is a General Substituent defined herein; and two substituents can be joined or fused to form a ring; the ligand L.sub.A is complexed to a metal M through the two indicated dash lines of each Formula; and the ligand L.sub.A can be joined with other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand.

A compound of Formula I,

##STR00001##

is provided where moieties B and D are monocyclic or polycyclic rings; M is Pt or Pd; each of X.sup.1 to X.sup.7, Z.sup.1, and Z.sup.2 is C or N; Y.sup.1 and Y.sup.2 are each independently linking groups; L.sub.1 and L.sub.2 are each independently absent a bond, a direct bond, or a linking group; K is selected from the group consisting of a direct bond, O, S, N(R.sup.α), P(R.sup.α), B(R.sup.α), C(R.sup.α)(R.sup.β), and Si(R.sup.α)(R.sup.β). Formulations, OLEDs, and consumer products containing the compound are also provided.