Discussed is a delayed fluorescence compound including a first electron donor moiety of indolo-[3,2,1-j,k]carbazole; a second electron donor moiety selected from indolo-[3,2,1-j,k]carbazole, carbazole, or triphenylamine; and an electron acceptor moiety selected from dibenzothiophene sulfone or diphenyl sulfone, wherein the first and second electron donor moieties are combined to the electron acceptor moiety, and the electron acceptor moiety is combined to a third position or a sixth position of the first electron donor moiety.

The present invention relates to bis-thienobenzothienothiophene compounds and a process for their preparation. More in particular, the present invention relates to a new angular bis-thienobenzothienothiophene compound and the process for its preparation wherein said process comprises reacting at least one dihalogenated dithiophene compound with at least one terminal alkyne and the subsequent double annulation reaction. Said bis-thienobenzothienothiophene compounds can be appropriately functionalized and polymerized to produce electron donor compounds that can be advantageously used in the construction of photovoltaic devices or semiconductor polymers. Furthermore, said bis-thienobenzothienothiophene compounds, after functionalization, may be advantageously used as spectral converters in luminescent solar concentrators.

In the organic electroluminescent device having at least an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and a cathode in this order, the hole injection layer includes an arylamine compound of the following general formula (1) and an electron acceptor.

##STR00001##

In the formula, Ar.sub.1 to Ar.sub.4 may be the same or different, and represent a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group.

This invention discloses a novel two dimensional material having propellane core for organic light emitting diodes. These compounds can be used as hosts, charging transporting materials, or blocking materials for PHOLEDs. The devices comprising these compounds have better performance due to the honeycomb pi-extended structure in the propellane molecules.

The present invention relates to an organic compound represented by Chemical Formula 1, an organic optoelectronic diode, and a display device.

A composite material which includes an organic compound and an inorganic compound and has a high carrier-transport property is provided. A composite material having a good property of carrier injection into an organic compound is provided. A composite material in which light absorption due to charge-transfer interaction is unlikely to occur is provided. A composite material having a high visible-light-transmitting property is provided. A composite material including a hydrocarbon compound and an inorganic compound exhibiting an electron-accepting property with respect to the hydrocarbon compound is provided. The hydrocarbon compound has a substituent bonded to a naphthalene skeleton, a phenanthrene skeleton, or a triphenylene skeleton and has a molecular weight of 350 to 2000, and the substituent has one or more rings selected from a benzene ring, a naphthalene ring, a phenanthrene ring, and a triphenylene ring.

The invention relates to metal complexes and to electronic devices, in particular organic electroluminescence devices, containing said metal complexes.

A condensed cyclic compound and an organic light-emitting device, the compound being represented by Formula 1 below: ##STR00001##

There is provided an electroactive material having Formula I

##STR00001##

wherein: Q is the same or different at each occurrence and can be O, S, Se, Te, NR, SO, SO.sub.2, or SiR.sub.3; R is the same or different at each occurrence and can be hydrogen, alkyl, aryl, alkenyl, or alkynyl; and R.sup.1 through R.sup.6 are the same or different and can be hydrogen, alkyl, aryl, halogen, hydroxyl, aryloxy, alkoxy, alkenyl, alkynyl, amino, alkylthio, phosphino, silyl, —COR, —COOR, —PO.sub.3R.sub.2, —OPO.sub.3R.sub.2, or CN.

Disclosed herein are combinations of a dopant compound and a host compound. The dopant being an Iridium complex and the host being a carbazole derivative. Also made known are electroluminescent devices comprising the same.