Polycyclic ring assembly compound and organic electroluminescent device employing the same

摘要

Polycyclic ring assembly compound which has a specific flexible partial structure, i.e., a structure containing an aromatic ring in which adjacent carbon atoms have, bonded thereto, an aromatic ring group of another kind and an aliphatic group or aromatic ring group. Also provided are: a polymer constituted of repeating units at least part of which are structures derived from the polycyclic ring assembly compound; a solution of an organic EL material containing the polycyclic ring assembly compound or the polymer; and an organic electroluminescence device. The organic electroluminescence device has excellent heat resistance, high color purity, and a long lifetime and can emit a blue light or green light at a high luminescent efficiency. The polycyclic ring assembly compound realizes the device.

主权项

1. An organic electroluminescence device, comprising one or more organic thin film layers including at least one light emitting layer interposed between a cathode and an anode, wherein at least one of the organic thin film layers comprises a polycyclic ring assembly compound represented by formula (1) as a light emitting material: wherein Ar1 represents a hydrogen atom, a substituted or unsubstituted aromatic ring group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted aromatic heterocyclic ring group having 5 to 50 ring atoms; wherein the substituent of the aromatic ring group and the aromatic heterocyclic ring group is selected from the group consisting of an alkyl group having 1 to 8 carbon atoms, a silyl group having 3 to 24 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a fluorine atom, a diphenylamino group, a dibenzofuranyl group, and a dibenzothiophenyl group; X represents a substituted or unsubstituted 9,10-anthracenediyl group; and —Ar2—Ar3—Ar4 is represented by one of formulae (4) to (6): wherein Ar2 represents a phenylene group; Ar4 represents a methyl group, a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 2-biphenylyl group, a 3-biphenylyl group, or a 4-biphenylyl group; and R′1 and R′3 to R′8 each independently represents a hydrogen atom or a phenyl group.