Organic electroluminescence device

An organic electroluminescence device comprising:

• an anode, a plurality of emitting layers, an electron-transporting region, and a cathode, sequentially;
• wherein
• the organic electroluminescence device further comprises a carrier barrier layer between at least two emitting layers among the plurality of emitting layers,
• an emitting layer among the plurality of emitting layers that is adjacent to the electron-transporting region 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, ETh is the triplet energy level of the host material, ETb is the triplet energy level of the barrier material, and ETb and ETh satisfy the following formula (1),
• ETb>ETh (1).

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,
• ETh is the triplet energy level of the host material, ETb is the triplet energy level of the barrier material, and
• ETb and ETh satisfy the following formula (1),
• ETb>ETh (1),
• wherein an affinity of the host material is Afh, an affinity of the barrier material is Afb, and Afh and Afb satisfy the following formula (3),
• Afh−Afb>0 eV (3).

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,
• ETh is the triplet energy level of the host material, ETb is the triplet energy level of the barrier material, and
• ETb and ETh satisfy the following formula (1),
• ETb>ETh (1),
• wherein an ionization potential of the host material is Iph, an ionization potential of the dopant material is Ipd, and Ipd and Iph satisfy the following formula (4),
• Ipd−Iph<0.2 eV (4).