The present invention provides charge transporting molecular glass mixtures, luminescent molecular glass mixtures, or combinations thereof comprising at least two nonpolymeric compounds each independently corresponding to the structure (R.sup.1Y.sup.1).sub.p[(Z.sup.1Y.sup.2).sub.mR.sup.2Y.sup.3].sub.nZ.sup.2Y.sup.4R.sup.3 wherein m is zero or one; n is zero up to an integer at which said compound starts to become a polymer; p is an integer of from one to eight; each R.sup.1 and R.sup.3 is independently a monovalent aliphatic or cycloaliphatic hydrocarbon group having 1 to 20 carbon atoms, an aromatic group or a multicyclic aromatic nucleus; R.sup.2, Z.sup.1, and Z.sup.2 each independently represent multivalent aliphatic or cycloaliphatic hydrocarbon groups having 1 to 20 carbon atoms or an aromatic group; and Y.sup.1, Y.sup.2, Y.sup.3 and Y.sup.4 each independently represent a triple bond, a double bond, or a single bond link.

Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1,2-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.

A phosphorescent emitter or delayed fluorescent and phosphorescent emitters represented by Formula 1 or Formula II, where M is platinum or palladium.

##STR00001##

A phosphorescent emitter or delayed fluorescent and phosphorescent emitters represented by Formula I or Formula II, where M is platinum or palladium.

##STR00001##

Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1,2-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.

A phosphorescent metal complex comprising at least one ligand substituted with a group of formula (IIIa), (IIIb) or (IIIc): wherein Y is selected from O, S, a substituted carbon atom; and a substituted silicon atom; Z in each occurrence is independently selected from N and P; R.sup.4 independently in each occurrence is a substituent; R.sup.5 independently in each occurrence is H or a substituent; x independently in each occurrence is 0, 1, 2 or 3; y and z in each occurrence are independently 0, 1, 2, 3 or 4. The group of formula (IIIa), (Mb) or (IIIc) may be directly bound to the ligand or spaced apart therefrom by a spacer group. The phosphorescent metal complex may be used as a light-emitting material in an organic light-emitting device.

##STR00001##

A compound of general formula (I): wherein A.sup.1, A.sup.2, A.sup.3, A.sup.4, B.sup.1, B.sup.2, B.sup.3, B.sup.4, C.sup.1, C.sup.2, C.sup.3, C.sup.4, X.sup.1 and X.sup.2 have the meanings as defined in the description provides electronic devices, preferably OLEDs, which ensure good efficiencies, good operative lifetimes and a high stability to thermal stress, and a low use and operating voltage of the OLEDs.

##STR00001##

This invention relates to compounds containing heterocycles or azaheterocycles and phenylene or azaphenylene wherein at least one ring is a five-membered ring. These novel compounds are useful as host materials for phosphorescent electroluminescent devices.

The present invention relates to mechanically linked emitter-emitter, host-host, and emitter-host materials. These materials may be useful in organic electroluminescence devices.

The present disclosure provides a nitrogen-containing heterocyclic compound having general formula (I) and an organic photoelectric apparatus thereof.

##STR00001## where A.sub.1, A.sub.2, A.sub.3, A.sub.4, A.sub.5, A.sub.6, A.sub.7, and A.sub.8 are independently selected from a hydrogen atom, at least one compound having the general formula (II) and at least one compound having the general formula (III),

##STR00002## where Y.sub.1, Y.sub.2, and Y.sub.3 are independently selected from C and N; R.sub.3 and R.sub.4 are independently selected from C.sub.6-30 aromatic group and C.sub.2-30 heterocyclic aromatic group,

##STR00003## wherein X is selected from any one of oxyl group (O), sulfhydryl group (S), substituted or non-substituted imino group, substituted or non-substituted methylene group, and substituted or non-substituted silicylene group; R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, and R.sub.12 are independently selected from hydrogen, deuterium, C.sub.1-30 alkyl group, C.sub.6-30 aromatic group, or C.sub.2-30 heterocyclic aromatic group.