Organic electroluminescent compound and organic electroluminescent device comprising the same

1. An organic electroluminescent device comprising an organic electroluminescent compound represented by the following formula 1:

wherein

at least one of both x and y, both y and z, both p and q, and both q and r are fused with the * positions in formula 1-a, with the proviso that the case where both x and y, and both y and z are simultaneously fused with the * positions in formula 1-a, and the case where both p and q, and both q and r are simultaneously fused with the * positions in formula 1-a, are excluded;

L represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (5- to 30-membered)heteroarylene;

X 1 to X 6 , each independently, represent N or CR 4 with the proviso, at least one of X 1 to X 6 represents N;

Ar 1 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (5- to 30-membered)heteroaryl;

R 1 to R 4 , each independently, represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl(C1-C30)alkyl, —NR 11 R 12 , —SiR 13 R 14 R 15 , —SR 16 , —OR 17 , a cyano, a nitro, or a hydroxyl;

R 11 to R 17 , each independently, represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, or a substituted or unsubstituted (C3-C30)cycloalkyl; or are linked to an adjacent substituent to form a substituted or unsubstituted, mono- or polycyclic, (3- to 30-membered) alicyclic or aromatic ring, or the combination thereof, which may comprise at least one heteroatom selected from nitrogen, oxygen, and sulfur;

a to c, each independently, represent an integer of 1 to 4, where if a to c, each independently, are an integer of 2 or more, each of R 1 to R 3 may be the same or different; and

the heteroaryl(ene) or the heterocycloalkyl contains at least one heteroatom selected from B, N, O, S, Si, and P, wherein the organic electroluminescent compound is comprised as a host material of a light-emitting layer.

2. The organic electroluminescent device according to claim 1 , wherein formula 1 is represented by any one of the following formulas 2 to 5:

wherein

L, Ar 1 , R 1 , R 2 , X 1 to X 6 , a and b are as defined in claim 1 ,

R 5 and R 6 , each independently, are as defined in R 1 and R 2 ,

d and e, each independently, represent an integer of 1 to 6, where if d and e, each independently, are an integer of 2 or more, each of R 5 and R 6 may be the same or different.

3. The organic electroluminescent device according to claim 1 , wherein the substituents of the substituted alkyl, the substituted aryl(ene), the substituted heteroaryl(ene), the substituted cycloalkyl, the substituted heterocycloalkyl, the substituted aralkyl, and the substituted mono- or polycyclic, alicyclic or aromatic ring, or the combination thereof, in L, Ar 1 , R 1 to R 4 , and R 11 to R 17 , each independently, are at least one selected from the group consisting of deuterium; a halogen; a cyano; a carboxyl; a nitro; a hydroxyl; a (C1-C30)alkyl; a halo(C1-C30)alkyl; a (C2-C30)alkenyl; a (C2-C30)alkynyl; a (C1-C30)alkoxy; a (C1-C30)alkylthio; a (C3-C30)cycloalkyl; a (C3-C30)cycloalkenyl; a (3- to 7-membered)heterocycloalkyl; a (C6-C30)aryloxy; a (C6-C30)arylthio; a (C6-C30)aryl; a (5- to 30-membered)heteroaryl; a tri(C1-C30)alkylsilyl; a tri(C6-C30)arylsilyl; a di(C1-C30)alkyl(C6-C30)arylsilyl; a (C1-C30)alkyldi(C6-C30)arylsilyl; an amino; a mono- or di-(C1-C30)alkylamino; a mono- or di-(C6-C30)arylamino; a (C1-C30)alkyl(C6-C30)arylamino; a (C1-C30)alkylcarbonyl; a (C1-C30)alkoxycarbonyl; a (C6-C30)arylcarbonyl; a di(C6-C30)arylboronyl; a di(C1-C30)alkylboronyl; a (C1-C30)alkyl(C6-C30)arylboronyl; a (C6-C30)aryl(C1-C30)alkyl; and a (C1-C30)alkyl(C6-C30)aryl.

4. The organic electroluminescent device according to claim 1 , wherein the compound represented by formula 1 is selected from the group consisting of: