Organic electroluminescence device

摘要

An organic electroluminescence device including: an anode (10), a cathode (70), an emitting layer (40) including an organic compound, which is between the anode (10) and the cathode (70), two or more layers arranged in a hole injection and transport region which is between the anode (10) and the emitting layer (40), and one or more layers arranged in an electron injection and transport region which is between the emitting layer (40) and the cathode (70), wherein a layer in the hole injection and transport region, which is in contact with the emitting layer (40), includes an aromatic amine derivative having a carbazole skeleton, one of the layers other than the layer in contact with the emitting layer (40) in the hole injection and transport region includes one or more materials selected from the group consisting of thiophene derivatives, tricyclic or more cyclic fused aromatic derivatives, amine derivatives excluding the compound represented by the following formula (A), conductive polymers, CFx, CuPc, transition metal oxides, fullerenes and acceptor materials, and a layer in the electron injection and transport region includes a benzimidazole derivative.;

主权项

1. An organic electroluminescence device comprising:
an anode, a cathode an emitting layer comprising an organic compound, which is between the anode and the cathode, two or more layers arranged in a hole injection and transport region which is between the anode and the emitting layer, and one or more layers arranged in an electron injection and transport region which is between the emitting layer and the cathode, wherein a layer in the hole injection and transport region, which is in contact with the emitting layer, comprises an aromatic amine derivative that has one carbazole skeleton, one of the layers other than the layer in contact with the emitting layer in the hole injection and transport region comprises an acceptor material that is an organic compound having a cyano group, and a layer in the electron injection and transport region comprises a benzimidazole derivative represented by the following formula (4): wherein Ar4 is a substituted fused ring group having 10 to 60 ring carbon atoms, Ar5 is a substituted or unsubstituted arylene group having 6 to 60 carbon atoms, L3 is a single bond, a substituted or unsubstituted arylene group having 6 to 60 ring carbon atoms, or a substituted or unsubstituted fluorenylene group, R13 is a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, n is an integer of 0 to 5, when n is 2 or more, plural R13s may be the same or different, and adjacent R13s may bond to each other to form a carbocyclic aliphatic ring or a carbocyclic aromatic ring, and R14 is a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, or -L3-Ar5—Ar4, provided that the benzimidazole derivative having a carbazole skeleton is excluded.