| abstract |
Organic light-emitting devices are disclosed. The organic light-emitting device includes a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, wherein the emissive layer comprises a thermally activated delayed fluorescence (TADF) emitter and a host and the TADF emitter is different from the host, and wherein the TADF emitter can satisfy some of the conditions disclosed in the specification. |