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

A light-emitting device including an organometallic compound represented by Formula 1, an electronic apparatus including the light-emitting device, and the organometallic compound represented by Formula 1 are provided:

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Embodiments provide an organometallic compound, a light-emitting device including the organometallic compound, and an electronic apparatus including the light-emitting device. The light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer between the first electrode and the second electrode and including an emission layer; and the organometallic compound. The organometallic compound is represented by Formula 1, which is explained in the specification:

##STR00001##

An infrared-emitting compound has a structure represented by the following Formula (1a). In Formula (1a), Ar and ring A each independently represent an aryl ring, a heteroaryl ring or a fused ring thereof. Q-Ar represents an infrared-emitting residue. R.sub.1 represents a group in which a dihedral angle between Ar and ring A is 45 degree or more. And a thick line represents a single bond or a double bond. ##STR00001##

Provided are organometallic compounds comprising one central metal atom and at least one at least bidentate ligand comprising at least two moieties which are independently a monocyclic ring or a polycyclic fused ring system, wherein the monocyclic ring or each ring of the polycyclic fused ring system is independently a 5-membered to 10-membered carbocyclic or heterocyclic ring. Also provided are formulations comprising these organometallic compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these organometallic compounds.

The present disclosure provides a compound including a first ligand L.sub.A of Formula I, ##STR00001##
In Formula I, ring A is a 7 to 12-membered heterocyclic ring that is fused to ring B, which is a 5-membered or 6-membered heterocyclic ring; ring C is a 5- or 6-membered ring; n is 1 or 2; X is selected from B, N, Al, In, and Ga; each W is selected from NR, O, S, Se, SO, SO.sub.2, BR, CRR, CCRR, SiRR, PRR, and GeRR; each of Z.sup.1, Z.sup.2, and Z.sup.3 is independently C or N; at least one of Z.sup.1, Z.sup.2, and Z.sup.3 is N; each R, R, R.sup.A, R.sup.B, and R.sup.C is hydrogen or general substituent; each of K.sup.1 and K.sup.2 is a direct bond, O, or S; L.sub.A is coordinated to a metal M. Formulations, OLEDs, and consumer products containing the compound are also disclosed.

Embodiments provide an organometallic compound, a light-emitting device including the organometallic compound, an electronic apparatus including the light-emitting device, and electronic equipment including the light-emitting device. The light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer between the first electrode and the second electrode, and the organometallic compound. The organometallic compound is represented by Formula 1, which is explained in the specification:

##STR00001##

Provided are organometallic compounds comprising a central metal atom and a ligand comprising at least four rings which are fused together, wherein at least one ring is a 6-membered aromatic ring. Also provided are formulations comprising these organometallic compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these organometallic compounds.

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.