This invention relates to the development of heterocyclic materials for use as blue phosphorescent materials in OLED devices. The materials were determined computationally to have appropriate triplet energies for use as blue emitters and to possess sufficient chemical stability for use in devices.

A compound is disclosed that is selected from the group consisting of a structure having ##STR00001##
and a structure having ##STR00002##

A nitrogen-containing heteroaromatic compound is represented by the following formula (A). ##STR00001##
wherein Y is an oxygen atom or a sulfur atom, M is a substituted or unsubstituted nitrogen-containing heteroaromatic group, and Ar.sub.2 is a substituted aromatic hydrocarbon group having 6 to 18 ring carbon atoms, a substituted or unsubstituted monocyclic heteroaromatic group having 5 or 6 ring atoms, a dibenzofuran ring group that may be substituted with a substituent (excluding a 3-carbazolyl group and an N-carbazolyl group), a dibenzothiophene ring group that may be substituted with a substituent (excluding a 3-carbazolyl group and an N-carbazolyl group), or a nitrogen-containing polycyclic group among nitrogen-containing polycyclic groups respectively represented by the following formulas (1) to (5). ##STR00002##

A composition of matter that includes a novel combination of host compounds containing indol-fused hosts and emissive dopants containing benzofuran or azabenzofuran ligand is disclosed,

This invention discloses iridium complexes with benzothienoquinoline, benzofuroquinoline, benzoselenophenoquinoline, and benzosiloloquinoline ligands. These complexes can be used as phosphorescent emitters in OLEDs.

Provided are transition metal compounds having 1,2,3-triazine. Also provided are formulations comprising these transition metal compounds having 1,2,3-triazine. Further provided are OLEDs and related consumer products that utilize these transition metal compounds having 1,2,3-triazine.

Provided is an organic light-emitting device including: an anode; a cathode facing the anode; and an organic layer arranged between the anode and the cathode and including an emission layer and an auxiliary layer, wherein the emission layer is in direct contact with the auxiliary layer, the emission layer includes a dopant, the auxiliary layer includes a first compound and a second compound, and the dopant, the first compound, and the second compound satisfy a certain equation.

An organometallic compound represented by Formula 1:

M.sub.1(L.sub.1).sub.n1(L.sub.2).sub.n2Formula 1

wherein, M.sub.1 is a transition metal, L.sub.1 is a ligand represented by Formula 1A, L.sub.2 is a ligand represented by Formula 1B, and n1 and n2 are each independently 1 or 2,

##STR00001##

wherein X.sub.43 is C(R.sub.43), N, or C bonded to Y.sub.3; X.sub.44 is C(R.sub.44), N, or C bonded to Y.sub.2 or Y.sub.3; X.sub.45 is C(R.sub.45), N, or C bonded to Y.sub.2 or Y.sub.3; X.sub.46 is C(R.sub.46), N, or C bonded to Y.sub.2, wherein i) X.sub.43 is C bonded to Y.sub.3, and X.sub.44 is C bonded to Y.sub.2; ii) X.sub.44 is C bonded to Y.sub.3, and X.sub.45 is C bonded to Y.sub.2; or iii) X.sub.45 is C bonded to Y.sub.3, and X.sub.46 is C bonded to Y.sub.2, and the remaining substituents are as described herein.

Platinum complexes that exhibit photoabsorption and photoemission, methods of making such complexes, and applications thereof are disclosed, including optical devices comprising the complexes.

A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The spiro compound of a general formula (1) having an azafluorene ring structure is used as a constituent material of at least one organic layer in an organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes.

##STR00001##