Organic light emitting diode with low voltage, high efficiency and long lifespan

An organic light-emitting diode, comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• a first emission layer containing a first host and a first dopant and a second emission layer containing a second host and a second dopant, both layers being interposed between the first electrode and the second electrode,
• wherein at least one of the first host and the second host includes a compound represented by the following Chemical Formula 1:
• wherein,
• A1 is a substituted or unsubstituted aromatic hydrocarbon ring of 6 to 14 carbon atoms,
• A2 is a substituted or unsubstituted aromatic hydrocarbon ring of 6 to 14 carbon atoms, or a substituted or unsubstituted aliphatic hydrocarbon ring-fused aromatic hydrocarbon ring of 8 to 20 carbon atoms wherein the aromatic ring moiety within the aromatic hydrocarbon ring fused to the aliphatic hydrocarbon ring has 6 to 14 carbon atoms,
• the substituents R1 and R2, which are same or different, are each independently any one selected from a substituted or unsubstituted alkyl of 1 to 30 carbon atoms, a substituted or unsubstituted aryl of 6 to 50 carbon atoms, a substituted or unsubstituted heteroaryl of 2 to 50 carbon atoms, and a substituted or unsubstituted aliphatic hydrocarbon ring-fused aryl of 8 to 30 carbon atoms,
• the substituents Ar1 and Ar2, which are same or different, are each independently any one selected from a substituted or unsubstituted alkyl of 1 to 30 carbon atoms, a substituted or unsubstituted halogenated alkyl of 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl of 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl of 2 to 30 carbon atoms, a substituted or unsubstituted aryl of 6 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl of 3 to 30 carbon atoms, a substituted or unsubstituted cycloalkenyl of 5 to 30 carbon atoms, a substituted or unsubstituted heterocycloalkyl of 2 to 30 carbon atoms, a substituted or unsubstituted heteroalkyl of 2 to 50 carbon atoms, a substituted or unsubstituted heteroaryl of 2 to 50 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon ring-fused cycloalkyl of 7 to 30 carbon atoms, a substituted or unsubstituted aromatic heterocyclic ring-fused cycloalkyl of 5 to 30 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon ring-fused heterocyclic alkyl of 6 to 30 carbon atoms, a substituted or unsubstituted aliphatic hydrocarbon ring-fused aryl of 8 to 30 carbon atoms, a substituted or unsubstituted aliphatic hydrocarbon ring-fused heteroaryl of 5 to 30 carbon atoms, a substituted or unsubstituted alkoxy of 1 to 30 carbon atoms, a substituted or unsubstituted aryloxy of 6 to 30 carbon atoms, a substituted or unsubstituted cycloalkyloxy of 3 to 30 carbon atoms, a substituted or unsubstituted heteroaryloxy of 2 to 30 carbon atoms, a substituted or unsubstituted alkylthio of 1 to 30 carbon atoms, a substituted or unsubstituted arylthio of 6 to 30 carbon atoms, a substituted or unsubstituted cycloalkylthio of 3 to 30 carbon atoms, a substituted or unsubstituted heteroarylthio of 2 to 30 carbon atoms, a substituted or unsubstituted amine of 0 to 40 carbon atoms, a substituted or unsubstituted silyl of 0 to 40 carbon atoms, a substituted or unsubstituted germanium of 0 to 40 carbon atoms, a thiol, a hydroxy, a nitro, a cyano, and a halogen,
• L1 and L2, which are same or different, are each independently a linker selected from a single bond, a substituted or unsubstituted arylene of 6 to 24 carbon atoms, a substituted or unsubstituted heteroarylene of 3 to 24 carbon atoms, and a substituted or unsubstituted aliphatic hydrocarbon ring-fused arylene of 8 to 24 carbon atoms,
• wherein the term “substituted” in the expression “a substituted or unsubstituted” used for the compounds of Chemical Formula 1 means having at least one substituent selected from the group consisting of a deuterium atom, a tritium atom, a cyano, a halogen, a thiol, a hydroxy, a nitro, alkyl of 1 to 30 carbon atoms, halogenated alkyl of 1 to 30 carbon atoms, an alkenyl of 2 to 24 carbon atoms, an alkynyl of 2 to 24 carbon atoms, a cycloalkyl of 3 to 24 carbon atoms, a heteroalkyl of 1 to 24 carbon atoms, an aryl of 6 to 24 carbon atoms, an arylalkyl of 7 to 24 carbon atoms, an alkylaryl of 7 to 24 carbon atoms, a heteroaryl of 2 to 24 carbon atoms, a heteroarylalkyl of 3 to 24 carbon atoms, an alkylheteroaryl of 3 to 24 carbon atoms, an alkoxy of 1 to 24 carbon atoms, an aromatic hydrocarbon ring-fused cycloalkyl of 7 to 30 carbon atoms, an aromatic heterocyclic ring-fused cycloalkyl of 5 to 30 carbon atoms, an aromatic hydrocarbon ring-fused heterocyclic alkyl of 6 to 30 carbon atoms, an aliphatic hydrocarbon ring-fused aryl of 7 to 30 carbon atoms, an aliphatic hydrocarbon ring-fused heteroaryl of 5 to 30 carbon atoms, an aliphatic heterocyclic ring-fused aryl of 6 to 30 carbon atoms, an aliphatic heterocyclic ring-fused heteroaryl of 5 to 30 carbon atoms, an amine of 1 to 30 carbon atoms, a silyl of 1 to 30 carbon atoms, a germanium of 1 to 30 carbon atoms, an aryloxy of 6 to 24 carbon atoms, and an arylthio of 6 to 24 carbon atoms, with at least one hydrogen atom on the substituent being substitutable with a deuterium or tritium atom.