Patent ID: 8803420

Claim:
An organic electroluminescence device comprising: an anode, an emitting layer, an electron-transporting region, and a cathode, sequentially; wherein the emitting layer comprises a host material and a dopant material that emits fluorescence having a main peak wavelength of 550 nm or less, the electron-transporting region comprises a barrier layer that is adjacent to the emitting layer, the barrier layer comprises a barrier material that comprises an electron-transporting structural portion and a triplet barrier structural portion that comprises a fused polycyclic aromatic hydrocarbon moiety, E T h is the triplet energy level of the host material, E T b is the triplet energy level of the barrier material, and E T b and E T h satisfy the following formula (1), E T b >E T h (1) wherein the electron-transporting structural portion comprises one or more partial structures shown by the following formula, and X 1 and X 2 independently represent a carbon atom or a nitrogen atom.