Organic light emitting device

A heterocyclic compound comprising a compound represented by Formula 1:

• wherein:
• each of Ar1 and Ar2 is independently selected from the group consisting of substituted and unsubstituted C6-C60 aryl groups, substituted and unsubstituted C4-C60 heteroaryl groups, and substituted and unsubstituted C6-C60 condensed polycyclic groups;
• X1 is selected from the group consisting of single bonds, substituted and unsubstituted C6-C30 aryl groups, substituted and unsubstituted C4-C30 heteroaryl groups, and substituted and unsubstituted C6-C30 condensed polycyclic groups;
• each of R1, R2, and R3 is independently selected from hydrogen, heavy hydrogen, substituted and unsubstituted C1-C50 alkyl groups, substituted and unsubstituted C1-C50 alkoxy groups, substituted and unsubstituted C6-C60 aryl groups, substituted and unsubstituted C4-C60 heteroaryl groups, and substituted and unsubstituted C6-C60 condensed polycyclic groups;
• each of R4 and R5 is independently selected from the group consisting of hydrogen, heavy hydrogen, substituted and unsubstituted C1-C30 alkyl groups, substituted and unsubstituted C1-C30 alkoxy groups, substituted and unsubstituted C6-C30 aryl groups, substituted and unsubstituted C4-C30 heteroaryl groups, and substituted and unsubstituted C6-C30 condensed polycyclic groups.