Organic EL device

An organic EL device, comprising:

• an anode;
• a cathode;
• and
• an organic thin-film layer provided between the anode and the cathode, wherein
• the organic thin-film layer comprises:
• a fluorescent-emitting layer comprising a fluorescent host and a fluorescent dopant;
• and
• a first phosphorescent-emitting layer comprising a first phosphorescent host and a first phosphorescent dopant,
• a triplet energy gap EgH of the fluorescent host is larger than a triplet energy gap EgpD of the first phosphorescent dopant, and
• the fluorescent host is a compound having a substituted or unsubstituted polycyclic fused aromatic skeleton, wherein the fluorescent host has a triplet energy gap of 2.10 eV to 3.00 eV.