| abstract |
An organic electroluminescence device ( 1 ) includes: an anode ( 3 ); a cathode ( 4 ); and an organic thin-film layer ( 10 ) interposed between the anode ( 3 ) and the cathode ( 4 ). The organic thin-film layer ( 10 ) includes a phosphorescent-emitting layer ( 5 ) containing a host and a phosphorescent dopant. The host contains a first host and a second host. The first host includes a substituted or unsubstituted polycyclic fused aromatic skeleton, the skeleton having 10 to 30 ring-forming atoms not including an atom of a substituent. The second host has an affinity level greater than the affinity level of the first host |