Organic electroluminescent compound, organic electroluminescent material comprising the same, and organic electroluminescent device

An organic electroluminescent compound represented by the following formula 1:

• wherein,
• X1 to X3 each independently represent CR12 or N;
• at least one of X1 to X3 represents N;
• Ar1 to Ar3 each independently represent a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• R1 to R3, and R12 each independently represent hydrogen, deuterium, halogen, cyano, carboxyl, nitro, hydroxyl, a substituted or unsubstituted (C1-C30)alkyl, 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 (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• or R1 and R3 may be linked to an adjacent substituent to form a substituted or unsubstituted (C3-C30) mono- or polycyclic, alicyclic or aromatic ring or the combination thereof;
• a and b each independently represent an integer from 0 to 4, c represents an integer from 0 to 2, when a or b is an integer of 2 or more or c is 2, each of R1, each of R2, or each of R3 may be the same or different;
• L1 is represented by any one of the following formulae R-2 and R-3:
• wherein,
• R4 represents hydrogen, deuterium, halogen, cyano, carboxyl, nitro, hydroxyl, a substituted or unsubstituted (C1-C30)alkyl, 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 (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
• d represents an integer from 0 to 6, when d is an integer of 2 or more, each of R4 may be the same or different;
• * represents a linkage position with an adjacent ring in formula 1.