ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME

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

wherein,

R 1 and R 2 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; or may be linked to an adjacent substituent to form a substituted or unsubstituted ring;

R 3 and R 4 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, 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, or a substituted or unsubstituted tri(C6-C30)arylsilyl;

L represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;

Ar 1 and Ar 2 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; or may be linked to each other to form a substituted or unsubstituted ring;

a represent an integer from 1 to 4, b represents an integer 1 or 2, when a or b is an integer of 2 or more, each of R 3 or each of R 4 may be the same or different; and

c represents an integer 1 or 2, when c is an integer 2, each of Ar 1 or each of Ar 2 may be the same or different.

2 . The organic electroluminescent compound according to claim 1 , wherein the formula 1 is represented by any one of the following formulae 1-1 to 1-6:

wherein, R 1 to R 4 , Ar 1 , Ar 2 , L, a, and b are as defined in claim 1 .

3 . The organic electroluminescent compound according to claim 1 , wherein Ar 1 and Ar 2 each independently represent any one of the the substituents selected from the following group I:

wherein, A 1 to A3 each independently represent a substituted or unsubstituted (C1-C30)alkyl or a substituted or unsubstituted (C6-C30)aryl;

L′ represents a substituted or unsubstituted (C6-C30)arylene or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and

represents bonding position with N.

4 . The organic electroluminescent compound according to claim 1 , wherein, R 1 and R 2 each independently represent hydrogen, a substituted or unsubstituted (C1-C18)alkyl, or a substituted or unsubstituted (C6-C18)aryl,

R 3 and R 4 each independently represent hydrogen or a substituted or unsubstituted (C6-C18)aryl,

L represent a single bond or a substituted or unsubstituted (C6-C18)arylene, and

Ar 1 and Ar 2 each independently represent one of the substituents listed in group I of claim 3 or are linked each other, so that the amine group forms a substituted or unsubstituted carbazole.

5 . The organic electroluminescent compound according to claim 1 , wherein the formula 1 is represented by any one of the following formulae I-1 to I-4:

wherein, R 1 to R 4 , L, a, and b are as defined in claim 1 ;

R 5 represents hydrogen or —NR x R y ;

R x and R y each independently represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, or a substituted or unsubstituted (C6-C30)aryl; and

d represents an integer of 1 or 2, when d is 2, each of R 5 may be the same or different.

6 . The organic electroluminescent compound according to claim 1 , wherein the substituents of the substituted (C1-C30)alkyl, the substituted (C6-C30)aryl(ene), the substituted (3- to 30-membered)heteroaryl(ene), the substituted (C3-C30)cycloalkyl, the substituted (C1-C30)alkoxy, the substituted tri(C1-C30)alkylsilyl, the substituted di(C1-C30)alkyl(C6-C30)arylsilyl, the substituted (C1-C30)alkyldi(C6-C30)arylsilyl, the substituted tri(C6-C30)arylsilyl, and the substituted ring, in R 1 to R 4 , Ar 1 , Ar 2 , and L, each independently, are at least one selected from the group consisting of deuterium, halogen, cyano, carboxyl, nitro, hydroxyl, (C1-C30)alkyl, halo(C1-C30)alkyl, (C2-C30)alkenyl, (C2-C30)alkynyl, (C1-C30)alkoxy, (C1-C30)alkylthio, (C3-C30)cycloalkyl, (C3-C30)cycloalkenyl, (3- to 7-membered) heterocycloalkyl, (C6-C30)aryloxy, (C6-C30)arylthio, (C6-C30)aryl-substituted or unsubstituted (5- to 30-membered)heteroaryl, (5- to 30-membered)heteroaryl-substituted or unsubstituted (C6-C30)aryl, tri(C1-C30)alkylsilyl, tri(C6-C30)arylsilyl, di(C1-C30)alkyl(C6-C30)arylsilyl, (C1-C30)alkyldi(C6-C30)arylsilyl, amino, mono- or di-(C1-C30)alkylamino, (C1-C30)alkyl-substituted or unsubstituted mono- or di-(C6-C30)arylamino, (C1-C30)alkyl(C6-C30)arylamino, (C1-C30)alkylcarbonyl, (C1-C30)alkoxycarbonyl, (C6-C30)arylcarbonyl, di(C6-C30)arylboronyl, di(C1-C30)alkylboronyl, (C1-C30)alkyl(C6-C30)arylboronyl, (C6-C30)ar(C1-C30)alkyl, and (C1-C30)alkyl(C6-C30)aryl.

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

8 . An organic electroluminescent material comprising the organic electroluminescent compound according to claim 1 .

9 . An organic electroluminescent device comprising the organic electroluminescent compound according to claim 1 .

10 . The organic electroluminescent device according to claim 9 , wherein the organic electroluminescent compound is contained in a hole transport layer and/or a hole auxiliary layer.