A compound represented by the following Chemical Formula 1: wherein, A is represented by Chemical Formula 2 and B is represented by Chemical Formula 3; or B is represented by Chemical Formula 2 and A is represented by Chemical Formula 3, L1 and L2 are the same as or different from each other, and each independently a direct bond; a substituted or unsubstituted arylene group; or a substituted or unsubstituted heteroarylene group, R1 to R8 are the same as or different from each other, and each independently hydrogen; deuterium; a nitrile group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryloxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted amine group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, n is an integer of 0 to 3, and when n is 2 or greater, each R8 is the same as or different from each other, Y is S, O, NRa, or CRbRc, Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, X1 to X3 are the same as or different from each other, and each independently N or CRd, L3 is a direct bond; a substituted or unsubstituted arylene group; or a substituted or unsubstituted heteroarylene group, Chemical Formula 3 is a substituted or unsubstituted monocyclic N-containing heteroaryl group, Ra to Rd are the same as or different from each other, and each independently hydrogen; deuterium; a nitrile group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, Rb and Rc bond to each other to form a ring structure, and * is a site bonding to L1 or L2. wherein, A is represented by Chemical Formula 2 and B is represented by Chemical Formula 3; or B is represented by Chemical Formula 2 and A is represented by Chemical Formula 3, L1 and L2 are the same as or different from each other, and each independently a direct bond; a substituted or unsubstituted arylene group; or a substituted or unsubstituted heteroarylene group, R1 to R8 are the same as or different from each other, and each independently hydrogen; deuterium; a nitrile group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryloxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted amine group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, n is an integer of 0 to 3, and when n is 2 or greater, each R8 is the same as or different from each other, Y is S, O, NRa, or CRbRc, Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, X1 to X3 are the same as or different from each other, and each independently N or CRd, L3 is a direct bond; a substituted or unsubstituted arylene group; or a substituted or unsubstituted heteroarylene group, Chemical Formula 3 is a substituted or unsubstituted monocyclic N-containing heteroaryl group, Ra to Rd are the same as or different from each other, and each independently hydrogen; deuterium; a nitrile group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group, Rb and Rc bond to each other to form a ring structure, and * is a site bonding to L1 or L2. <EOS>