Patent ID: 7759855

Claim:
An organic electroluminescent element comprising a light emission layer containing a host compound and a phosphorescent compound, the host compound having reorganization energy of from more than 0 to 0.50 eV, wherein the reorganization energy is energy in the process in which the host compound changes to the anion radical, and calculated employing Gaussian 98, wherein the host compound is represented by Formula 1 below, X 1 −(A 1 ) n , Formula 1 wherein X 1 represents a chemical bond; n represents an integer of 2; and A 1 represents a group represented by the following Formula 2 below, provided that plural A 1 s may be the same or different; wherein Ar 1 represents a substituted phenylene group having a substituent in an ortho position relative to the chemical bond; and R 1 and R 2 independently represent a hydrogen atom or a substituent; and na and nb independently represent an integer of from 1 to 4.