Compound for capping layer and organic light emitting device including same

A compound for a capping layer, the compound being represented by Formula 1 below:

• wherein Ar is a substituted or unsubstituted C6-C30 arylene group,
• L and L1 are each independently a direct bond, a substituted or unsubstituted C1-C50 alkylene group, a substituted or unsubstituted C2-C50 alkenylene group, a substituted or unsubstituted C1-C50 alkyleneoxy group, an ether group, a substituted or unsubstituted C1-C50 sulfide group, a thioether group, a substituted or unsubstituted C1-C50 carbonyl group, substituted or unsubstituted —NR4C(X1)-, substituted or unsubstituted —C(X2) NR5-, substituted or unsubstituted —C(X3)-, substituted or unsubstituted —NR6-, a substituted or unsubstituted C3-C50 cycloalkylene group, a substituted or unsubstituted C1-C50 heterocycloalkylene group, or a combination thereof,
• X, X1 to X3 are each independently O, S, Se, Te, NR7, or CR8R9, and
• R1 to R9 are each independently hydrogen, deuterium, halogen, a nitro group, a nitrile group, a hydroxy group, a thiol group, a substituted or unsubstituted amino group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C1-C50 alkoxy group, a substituted or unsubstituted C1-C50 sulfide group, a substituted or unsubstituted silyl group, a substituted or unsubstituted C3-C50 cycloalkyl group, a substituted or unsubstituted C1 to C50 heterocycloalkyl group, a substituted or unsubstituted C3 to C50 aryl group, or a substituted or unsubstituted C2 to C50 heteroaryl group, and a plurality of adjacent R1 to R9 may or may not form a ring by bonding with each other.