Patent ID: 7374829

Claim:
An organic electroluminescent element comprising a pair of electrodes and provided therebetween a light emission layer containing a first fluorescent compound and a phosphorescent compound, the first fluorescent compound having a nitrogen atom number to carbon atom number ratio in the molecule (N/C) of from more than 0 to less than 0.05, wherein the first fluorescent compound is represented by the following formula (I), (II), or (IV): wherein R 1 and R 2 independently represent a substituent; Ar represents an aromatic hydrocarbon ring or an aromatic heterocyclic ring, where each ring can have a substituent; and n is an integer from 0 to 3; wherein R 6 , R 7 and R 8 independently represent a substituent selected from a halogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aryl group, an aryloxy group and a heterocyclic group; and n4, n5 and n6 independently represent an integer from 0 to 7; or wherein R 101 through R 128 independently represent a hydrogen atom or a substituent, where at least one of R 101 through R 104 represents a substituent.