in Chemical Formula 3,
R100 is hydrogen; deuterium; a halogen group; a cyano group; a nitro group; a hydroxyl 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 alkylthioxy group; a substituted or unsubstituted arylthioxy group; a substituted or unsubstituted alkylsulfoxy group; a substituted or unsubstituted arylsulfoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted alkylamine group; a substituted or unsubstituted aralkylamine group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted heteroarylamine group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; a substituted or unsubstituted carbazole group; or a substituted or unsubstituted heteroaryl group, x is an integer of 1 to 6, and when x is 2 or greater, R100s are the same as or different from each other,
L11 to L14 are the same as or different from each other, and each independently a direct bond; or a substituted or unsubstituted arylene group, u, v, w and y are each an integer of 1 or 2, and when u is 2, L11s are the same as or different from each other, when v is 2, L12s are the same as or different from each other, when w is 2, L13s are the same as or different from each other, and when y is 2, L14s are the same as or different from each other,