Organic electroluminescent compound and organic electroluminescent device comprising the same

An organic electroluminescent compound represented by the following Formula 1:

• wherein,
• Y1 to Y6 each independently represent hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, or a substituted or unsubstituted fused ring of a (C3-C30)aliphatic ring and a (C6-C30)aromatic ring;
• or may be linked to an adjacent substituent to form a ring;
• and
• Y7 and Y8 each independently represent hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkynyl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• provided that at least one of Y1 to Y8 is represented by the following Formula 1-a or 1-b, or is HAr, which is a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• wherein,
• the dotted line indicates the presence or absence of each ring;
• L represents a single bond, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C2-C30)alkynylene;
• X1 to X3 each independently represent —N═, —O—, —S—, or —CRa—;
• provided that one of X1 to X3 is —N═, another one of X1 to X3 is —O— or —S—, and the remaining one of X1 to X3 is —O—, —S—, or —CRa—;
• X4 and X5 each independently represent —N═, —O—, or —S—;
• provided that one of X4 and X5 is —N═ and the other is —O— or —S—;
• R1 to R3 each independently represent a position for bonding to L, hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, or a substituted or unsubstituted (C1-C30)alkoxy;
• or may be linked to an adjacent substituent to form a ring;
• Ra and R4 to R6 each independently represent hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, or a substituted or unsubstituted (C1-C30)alkoxy;
• or may be linked to an adjacent substituent to form a ring;
• m is an integer of 1 or 2, and when m is 2, each L may be the same or different;
• a and d are each independently an integer of 1 or 2, and b, c, e, and f are each independently an integer of 1 to 4;
• and
• when a to f are integers of 2 or more, each of R1 to each of R6 may be the same or different.