ORGANIC ELECTROLUMINESCENT ELEMENT

摘要

Disclosed is an organic electroluminescent element which sequentially comprises a positive electrode, a light emitting layer, an electron transport band and a negative electrode in this order. The light emitting layer contains a host material and a dopant material that exhibits fluorescence having a main peak wavelength of 550 nm or less. The electron transport band comprises a barrier layer that is adjacent to the light emitting layer, and the barrier layer contains a barrier material that has an electron transport structure portion and a triplet barrier structure portion, which is composed of a fused polycyclic aromatic hydrocarbon compound, and satisfies the relation ET b > ET h (wherein ET b and ET h respectively represent the triplet energy of the host material and the triplet energy of the barrier material).