Organic light-emitting device

An organic light-emitting device comprising:

• a first electrode;
• a second electrode;
• and
• an organic layer between the first electrode and the second electrode,
• the organic layer comprising a first layer including a heterocyclic compound represented by Formula 2 below:
• wherein X2 is a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C3-C50 cycloalkyl group, a substituted or unsubstituted C5-C50 arylthio group, a substituted or unsubstituted C5-C60 aryl group, a substituted amino group with a C5-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, or a substituted or unsubstituted C6-C60 condensed polycyclic group;
• and R9 and R10 are each independently a hydrogen atom, a heavy hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C3-C50 cycloalkyl group, a substituted or unsubstituted C1-C50 alkoxy group, a substituted or unsubstituted C5-C50 aryloxy group, a substituted or unsubstituted C5-C50 arylthio group, a substituted or unsubstituted C5-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C6-C60 condensed polycyclic group, a halogen atom, a cyano group, a nitro group, a hydroxyl group, or a carboxyl group,
• R11, R12, and R14-R16 are each independently a hydrogen atom or a heavy hydrogen atom;
• R13 is selected from the group consisting of a phenyl group, a naphthyl group, a biphenyl group, a terphenyl group, an anthracenyl group, a fluorenyl group, and a pyrenyl group;
• an unsubstituted C3-C60 heteroaryl group;
• a unsubstituted C5-C50 arylamine group;
• a substituted monocyclic to tetracyclic aryl group selected from the group consisting of a phenyl group, a naphthyl group, a biphenyl group, a terphenyl group, an anthracenyl group, a fluorenyl group, and a pyrenyl group which are substituted with a C1-C5 alkyl group, a C1-C5 alkoxy group, a cyano group, an amine group, a phenoxy group, a phenyl group or a halogen group;
• a substituted C3-C60 heteroaryl group which is substituted with a C1-C5 alkyl group, a C1-C5 alkoxy group, a cyano group, an amine group, a phenoxy group, a phenyl group or a halogen group;
• or a substituted C5-C50 arylamine group which is substituted with a C1-C5 alkyl group, a C1-C5 alkoxy group, a cyano group, an amine group, a phenoxy group, a phenyl group and a halogen group.