A compound represented by the following Chemical Formula 1: in Chemical Formula 1, X is Y is Z is Ar1 is a substituted or unsubstituted aryl group, L is a direct bond; or a substituted or unsubstituted arylene group, R1 is hydrogen; deuterium; or a substituted or unsubstituted alkyl group, R2 and R3 are the same as or different from each other, and are each independently hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group, a is an integer of 0 to 5, b is an integer of 0 to 7, c is an integer of 0 to 11, and when a is 2 or more, R1's are the same as or different from each other, when b is 2 or more, R2's are the same as or different from each other, and when c is 2 or more, R3's are the same as or different from each other, wherein the term "substituted or unsubstituted" means being unsubstituted or substituted with one or more substituents selected from the group consisting of deuterium; a halogen group; a nitrile group; a nitro group; a hydroxy group; a carbonyl group; an ester group; an imide group; an amino group; a phosphine oxide group; an alkoxy group; an aryloxy group; an alkylthioxy group; an arylthioxy group; an alkylsulfoxy group; an arylsulfoxy group; a silyl group; a boron group; a germanium group; an alkyl group; a cycloalkyl group; an alkenyl group; an aryl group; an aralkyl group; an aralkenyl group; an alkylaryl group; an alkylamine group; an aralkylamine group; a heteroarylamine group; an arylamine group; an arylphosphine group; and a heterocyclic group, or being unsubstituted or substituted with a substituent to which two or more substituents among the preceding substituents are linked. X is Y is Z is Ar1 is a substituted or unsubstituted aryl group, L is a direct bond; or a substituted or unsubstituted arylene group, R1 is hydrogen; deuterium; or a substituted or unsubstituted alkyl group, R2 and R3 are the same as or different from each other, and are each independently hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group, a is an integer of 0 to 5, b is an integer of 0 to 7, c is an integer of 0 to 11, and when a is 2 or more, R1's are the same as or different from each other, when b is 2 or more, R2's are the same as or different from each other, and when c is 2 or more, R3's are the same as or different from each other, wherein the term "substituted or unsubstituted" means being unsubstituted or substituted with one or more substituents selected from the group consisting of deuterium; a halogen group; a nitrile group; a nitro group; a hydroxy group; a carbonyl group; an ester group; an imide group; an amino group; a phosphine oxide group; an alkoxy group; an aryloxy group; an alkylthioxy group; an arylthioxy group; an alkylsulfoxy group; an arylsulfoxy group; a silyl group; a boron group; a germanium group; an alkyl group; a cycloalkyl group; an alkenyl group; an aryl group; an aralkyl group; an aralkenyl group; an alkylaryl group; an alkylamine group; an aralkylamine group; a heteroarylamine group; an arylamine group; an arylphosphine group; and a heterocyclic group, or being unsubstituted or substituted with a substituent to which two or more substituents among the preceding substituents are linked. <EOS>