| abstract |
An organic light-emitting device comprising a first electrode, a second electrode facing the first electrode, an emission layer between the first electrode and the second electrode, a hole transport region between the first electrode and the emission layer, and an electron transport region between the emission layer and the second electrode; wherein the electron transport region comprises at least one compound represented by Formula 1, and the emission layer comprises at least one compound represented by one selected from Formulae 2-1, 2-2, and 2-3: |