A compound represented by formula (1): ##STR00001##
wherein R.sup.1 to R.sup.5, a to e, L.sup.1 to L.sup.3, Ar, and X are as defined in the description.

A phosphorescent compound of formula (I): ##STR00001##
wherein: M is a transition metal; C.sup.1 is a carbon atom forming a metal-carbene bond with M; A is a saturated bridged bicyclic or saturated bridged tricyclic group consisting of one nitrogen atom and 6-12 carbon atoms; either: (i) X.sup.1 is a bridgehead carbon atom of the bridged bicyclic or bridged tricyclic group and X.sup.2 is NR.sup.1 wherein R.sup.1 is a substituent, or (ii) X.sup.1 is N and X.sup.2 is a bridgehead group of formula CR.sup.6 wherein R.sup.6 is H or a substituent; Ar.sup.1 is a C.sub.6-20 aromatic group or a 5-20 membered heteroaromatic group; L in each occurrence is independently a mono- or poly-dentate ligand other than a ligand of formula A-Ar.sup.1; x is at least 1; and y is 0 or a positive integer. The compound of formula (I) may be used as a blue light-emitting material in a white organic light-emitting device.

A biscarbazole derivative having a specific group, which is represented by formula (1); ##STR00001##
and an organic electroluminescence device in which a plurality of organic thin-film layers including a light emitting layer are disposed between a cathode and an anode, and at least one of the organic thin-film layers include the biscarbazole derivative. The organic electroluminescence device exhibits high emission efficiency and has a long lifetime. In formula (1), each of A.sub.1 and A.sub.2 independently represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms; each of Y.sub.1 to Y.sub.16 independently represents C(R) or a nitrogen atom; each of R groups independently represents a hydrogen atom, etc.; and each of L.sub.1 and L.sub.2 independently represents a single bond, etc.; provided that at least one of A.sub.1, A.sub.2 and R represents a substituted or unsubstituted fluoranthenyl group, etc.

Disclosed is an organic light emitting diode including a cathode, an anode, a light emitting layer provided between the cathode and the anode, a first electron transporting layer including a heterocyclic compound represented by Formula 1 and provided between the cathode and the light emitting layer, and a second electron transporting layer including a host material including one or two or more of compounds represented by Formulae 3 to 5 and one or two or more n-type dopants selected from alkali metals and alkaline earth metals and provided between the cathode and the first electron transporting layer: ##STR00001##

Disclosed are the compound for an organic optoelectronic device, the compound being represented by Chemical Formula 1, a composition for an organic optoelectronic device including the compound for an organic optoelectronic device, an organic optoelectronic device, and a display device. ##STR00001##
In Chemical Formula 1, each substituent is the same as defined in the specification.

The present specification provides a multicyclic compound of Chemical Formula 1, and an organic light emitting device including the same.

The present invention relates to a compound of the formula (I), (II) or (III), to the use of the compound in an electronic device, and to an electronic device comprising a compound of the formula (I), (II) or (III). The present invention furthermore relates to a process for the preparation of a compound of the formula (I), (II) or (III) and to a formulation comprising one or more compounds of the formula (I), (II) or (III).

The present disclosure relates to an electron transport material having a structure represented by formula (I). The present disclosure enhances the glass transition temperature of the material by way of increasing the molecular weight thereof through modifying phenanthroline, without influencing the electron transport property of the material. A novel type of electron transport material having a glass transition temperature of more than 100° C. is designed by the present disclosure. The compound provided by the present disclosure is used as an electron transport material, i.e. as an electron transport layer; and the compound is doped with metals for use as an electron injection layer, thereby improving the efficiency of an OLED device and reducing the operation voltage.

A compound for an organic optoelectronic device represented by Chemical Formula 1 and an organic optoelectronic device including the same are provided. ##STR00001## In Chemical Formula 1, R1 to R5 are independently hydrogen, deuterium, —NH2, a substituted or unsubstituted C1 to C30 alkylamine group, a substituted or unsubstituted C26 to C30 arylamine group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, or a combination thereof, at least one of R2, R4, and R5 is a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C6 to C30 arylamine group, or a substituted or unsubstituted C2 to C30 heteroaryl group, each of a, c, d, e, and f is an integer of 1 to 4, and b is an integer of 1 or 2.

A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and D.sub.1 and D.sub.2 are each independently represented by one of a formula (2), a formula (3) and formula (3x) below, D.sub.1 and D.sub.2 being optionally mutually the same or different. ##STR00001##