ORGANIC ELECTROLUMINESCENT ELEMENT

摘要

An organic electroluminescence device including an anode, an emitting layer, a blocking layer, an electron-injecting layer and a cathode in sequential order; wherein the emitting layer contains a host and a dopant which gives fluorescent emission of which the main peak wavelength is 550 nm or less; the affinity Ad of the dopant is smaller than the affinity Ah of the host; the triplet energy E T d of the dopant is larger than the triplet energy E T h of the host; the triplet energy E T b of the blocking layer is larger than E T h ; and the blocking layer includes an aromatic hydrocarbon compound.