| abstract |
Provided is an organic light emitting device including a first electrode; a second electrode opposite to the first electrode; and a first organic material layer and a second organic material layer provided between the first electrode and the second electrode, wherein the first organic material layer includes a compound of Chemical Formula 1:wherein:at least one of Xa to Xc is N, and the rest are CR; andAr2 to Ar4 are each independently a substituted or unsubstituted aryl or heterocyclic group, andthe second organic material layer includes a compound of(HAr)a-[L1-Ar1-L2-(CN)b]c Chemical Formula 2:wherein:HAr is a substituted or unsubstituted heterocyclic group including at least one or more Ns;L1 and L2 are each independently a direct bond or a substituted or unsubstituted arylene or divalent heterocyclic group; andAr1 is a direct bond, —O—, or a substituted or unsubstituted arylene or divalent heterocyclic group. |