Novel organic electroluminescent compounds and organic electroluminescent device comprising the same

An organic electroluminescent compound represented by the following formula 1:

• wherein
• A is represented by the following formula 2:
• formula 2 is bonded to the compound of formula 1 via *;
• Z is represented by the following formula 3:
• *-(L1)m-Ar1 (3);
• formula 3 is bonded to the compound of formula 1 via *;
• L1 and L2 each independently represent a single bond, a substituted or unsubstituted 5-to 30-membered heteroarylene group, or a substituted or unsubstituted (C6-C30)arylene group;
• X and Y each independently represent —O—, —S—, —N(R6)—, —C(R7)(R8)—, or —Si(R9)(R10)—;
• Ar1 and R1 to R5 each independently represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl group, a substituted or unsubstituted (C6-C30)aryl group, a substituted or unsubstituted 5- to 30-membered heteroaryl group, —NR11R12, or —SiR13R14R15;
• or are linked to an adjacent substituent(s) to form a mono- or polycyclic, 3- to 30-membered alicyclic or aromatic ring whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen and sulfur, proviso that where q is 1, R1 is not the group of formula 2, and p is 1, R3 is not the group of formula 2;
• R6 to R15 each independently represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl group, a substituted or unsubstituted (C6-C30)aryl group, or a substituted or unsubstituted 5- to 30-membered heteroaryl group;
• or are linked to an adjacent substituent(s) to form a mono- or polycyclic, 3- to 30-membered alicyclic or aromatic ring;
• m and n each independently represent an integer of 0 to 2;
• where m is 2, each of L1 is the same or different, and n is 2, each of L2 is the same or different;
• p and q each independently represent an integer of 0 or 1;
• where p+q=1;
• s and t each independently represent an integer of 1 or 2;
• where s is 2, each of R4 is the same or different, and t is 2, each of R5 is the same or different;
• and
• the heteroaryl(ene) group contains at least one hetero atom selected from B, N, O, S, P(═O), Si and P.