Patent ID: 8790793

Claim:
An organic electroluminescent element comprising a substrate having thereon an anode, a cathode, and a plurality of organic layers sandwiched between the anode and the cathode, wherein the plurality of organic layers comprise: a light emitting layer containing a phosphorescence emitting compound; and an electron transport layer containing an electron transport compound represented by Formula (1), (Ar1)n1-Y1 Formula (1) wherein Y1 is a single bond or a heteroaryl group of n1 valences; the heteroaryl group being one selected from the group consisting of a carboline ring, a diazacarbazole ring, a triazole ring, a pyrrole ring, a quinoxaline ring, and an indole ring; and n1 is an integer of two or more; Ar1 is a group represented by Formula (A), a plurality of Ar1 may be the same or different with each other; and the compound represented by Formula (1) contains at least two condensed aromatic heterocyclic rings each comprising 3 or more rings condensed with each other: wherein X is —O— or —S—; E1 to E8 each are —C(R1)═, R1 is a hydrogen atom, a substituent or a bonding site to Y1, (*) is a bonding site to Y1; Y2 is a single bond; Y3 is a group derived from a 6 membered aromatic ring, and Y4 is a group derived from a 6 membered aromatic heterocyclic ring containing a nitrogen atom in the ring; Y3 is bonded to Y4 at an ortho position or a meta position of Y3; and n2 is an integer of 1 to 4; and wherein the light emitting layer further contains a host compound which has a different structure from the compound represented by Formula (1).