Indolocarbazole derivative with fused heterocyclic aromatic group for organic electroluminescent device and organic electroluminescent device containing same

摘要

Disclosed is an organic electroluminescent device (organic EL device) that is improved in the luminous efficiency, fully secured of the driving stability, and of a simple structure and also disclosed is a compound for organic EL device useful for the said device. The compound for organic EL device is, for example, an indolocarbazole derivative represented by the following general formula (3). The organic EL device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the said light-emitting layer comprises a phosphorescent dopant and the aforementioned indolocarbazole derivative as a host material. In general formula (3), L is an aromatic heterocyclic group of a fused-ring structure with a valence of (n+1), Ar1 to Ar3 each is an alkyl group, an aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon or aromatic heterocyclic group, and n is an integer of 0-5.;

主权项

1. A compound for an organic electroluminescent device represented by the following general formula (1): wherein ring a is an aromatic or heterocyclic ring fused to two adjacent rings and represented by formula (a1), and ring b is a heterocyclic ring fused to two adjacent rings and represented by formula (b1); X is CR or N; L is an aromatic heterocyclic group of a fused-ring structure with a valence of (n+1); Ar1 and Ar3 each is independently an alkyl group, an aralkyl group, or a C6-C15 substituted or unsubstituted aromatic hydrocarbon or C3-C15 substituted or unsubstituted aromatic heterocyclic group and Ar3 is never a nitrogen-containing six-membered ring; R and R1 to R5 each is independently hydrogen, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, a cyano group, a nitro group, an alkoxyl group, an alkylsulfonyl group, a haloalkyl group, a hydroxyl group, or a substituted or unsubstituted aromatic hydrocarbon group; and n is an integer of 0-5.