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
一种有机电致发光装置(1)包括:阳极(3);阴极(4);以及位于阳极(3)和阴极(4)之间的有机薄膜层(10)。有机薄膜层(10)包括一个
磷光发光层(5),其中包含一个宿主和一个
磷光掺杂剂。宿主包含第一宿主和第二宿主。第一宿主包括一个取代或未取代的多环融合芳香族骨架,该骨架具有 10 至 30 个成环原子,其中不包括一个取代基原子。第二宿主的亲和力大于第一宿主的亲和力