Organic electroluminescent device

An organic electroluminescent device comprising an anode, organic layers comprising a phosphorescent light-emitting layer, and a cathode piled one upon another on a substrate wherein at least one organic layer selected from the group consisting of a phosphorescent light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer contains an indolocarbazole compound represented by general formula (I);

• In general formula (1), L is an (m+n+p+q)-valent aromatic hydrocarbon group of 6 to 50 carbon atoms or an (m+n+p+q)-valent aromatic heterocyclic group of 3 to 50 carbon atoms;
• each of Y1 to Y4 is represented by any one of formulas (1a-1) to (1a-6) and at least one of them is different from the others;
• m is an integer of 1 to 3, n is an integer of 1 to 3, p is an integer of 0 to 3, q is an integer of 0 to 3, and m+n+p+q is an integer of 2 to 6;
• In formulas (1a-1) to (1a-6), each A is independently an alkyl group of 1 to 10 carbon atoms, a cycloalkyl group of 3 to 11 carbon atoms, an aromatic hydrocarbon group of 6 to 50 carbon atoms, or an aromatic heterocyclic group of 3 to 50 carbon atoms;
• each of R1 to R3 is independently a hydrogen atom, an alkyl group of 1 to 10 carbon atoms, a cycloalkyl group of 3 to 11 carbon atoms, an aromatic hydrocarbon group of 6 to 12 carbon atoms, or an aromatic heterocyclic group of 3 to 12 carbon atoms;
• however, in formulas (1a-1), (1a-2), (1a-4), and (1a-6), R3 may form a fused ring together with the six-membered ring to which R3 is linked.