Provided are organometallic compounds that include a ligand L.sub.A of

##STR00001##

that are useful as emitters in OLEDs. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

A benzofuropyrimidine derivative or a benzothienopyrimidine derivative that is a novel organic compound is provided. The organic compound has a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton and is represented by General Formula (G1) below. In General Formula (G1), Q represents oxygen or sulfur. Each of A.sup.1 and A.sup.2 independently represents a substituted or unsubstituted polycyclic aromatic hydrocarbon. Furthermore, m represents any one of integers from 0 to 4. Furthermore, n represents any one of integers from 1 to 4. Each of R.sup.1 to R.sup.12 independently represents any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 7 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.

Provided are compounds comprising a first ligand L.sub.A comprising at least two 5-membered or 6-membered carbocyclic rings, wherein at least one of the two 5-membered or 6-membered carbocyclic rings is further substituted with a bicyclic structure containing two nitrogen atoms and one of O, S, CRR′, and SiRR′. 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 provides the compound Formula A, an organic electric element comprising a first electrode, a second electrode, and an organic material layer between the first electrode and the second electrode, and electronic device thereof, and by comprising the compound of Formula A in the organic material layer, the driving voltage of the organic electric element can be lowered, and the luminous efficiency and life time of the organic electric element can be improved.

A condensed cyclic compound represented by Formula 1:
Ar.sub.1-L.sub.1-L.sub.2-Ar.sub.2  Formula 1 wherein, in Formula 1, Ar.sub.1, Ar.sub.2, L.sub.1, and L.sub.2 are the same as described in the specification.

The present invention provides an electroluminescent compound of one of following formulas Formula 1 and Formula 2. Another aspect of the invention is an electroluminescent device including a first electrode; a second electrode facing the first electrode; and at least one organic material layer between the first and second electrodes, wherein one or more of the at least one organic material layer includes the electroluminescent compound. ##STR00001##

The present invention describes carbazole, dibenzofuran, dibenzothiophene and fluorene derivatives which are substituted by electron-deficient heteroaryl groups, in particular for use as triplet matrix materials in organic electroluminescent devices. The invention furthermore relates to a process for the preparation of the compounds according to the invention and to electronic devices comprising these compounds.

A compound having a formula (L.sub.A).sub.mIr(L.sub.B).sub.3−m having a structure selected from ##STR00001##
is disclosed. In the structures of formula (L.sub.A).sub.mIr(L.sub.B).sub.3-m, m is 1 or 2, R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are each independently selected from hydrogen, deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof, and, R.sup.6 is selected from C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof.

A novel compound having a first ligand L.sub.A of ##STR00001##
is disclosed. The compound is useful as emitter dopant in OLEDs.

The present disclosure describes an electroluminescent material which is formed of a compound having a structure of Formula (I), an OLED display panel utilizing the compound and an electronic device having the OLED display panel. The OLED display panel includes a first electrode, a second electrode, and an organic thin film layer disposed between the first electrode and the second electrode. The organic thin film layer comprises an electron transport layer which comprises any one or a combination of at least two of the compounds. The electroluminescent material has a triplet energy level E.sub.T of ≥2.7 eV, a HOMO energy level of ≤−5.85 eV, and a glass transition temperature of >120° C. This compound improves luminous efficiency in the OLED display panel and the electronic device.