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

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

wherein

Y represents S, O or NR 5 ;

R 1 to R 5 , each independently, represent deuterium, a halogen, a 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, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino; or are linked to adjacent R 1 to R 5 to form a substituted or unsubstituted, mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, or the combination thereof, whose carbon atom(s) may be replaced with at least one heteroatom selected from nitrogen, oxygen, and sulfur;

the heteroaryl contains at least one heteroatom selected from B, N, O, S, Si, and P;

a, b and d, each independently, represent an integer of 0 to 4, c represents an integer of 0 to 3; where if a to d, each independently, represent an integer of 2 or more, each of R 1 to R 4 may be the same or different; and

with the proviso, when Y represents NR 5 and a represents 2, two R 1 are not fused with the aryl ring to which they are attached to form a carbazole ring.

2. The organic electroluminescent compound according to claim 1 , wherein the substituents of the substituted (C1-C30)alkyl, the substituted (C6-C30)aryl, the substituted (3- to 30-membered)heteroaryl, 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, the substituted mono- or di-(C1-C30)alkylamino, the substituted mono- or di-(C6-C30)arylamino, the substituted (C1-C30)alkyl(C6-C30)arylamino, and the substituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, or the combination thereof, in R 1 to R 5 , 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 (5- to 30-membered)heteroaryl unsubstituted or substituted with a (C6-C30)aryl; a (C6-C30)aryl unsubstituted or substituted with 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 unsubstituted or substituted with a (C1-C30)alkyl; 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.

3. The organic electroluminescent compound according to claim 1 , wherein formula 1 is represented by the following formula 2:

wherein

R 1 to R 4 , each independently, represent a substituted or unsubstituted (C6-C25)aryl, a substituted or unsubstituted (5- to 25-membered)heteroaryl, or a substituted or unsubstituted di(C6-C25)arylamino; or are linked to adjacent R 1 to R 4 , respectively, to form a substituted or unsubstituted, mono- or polycyclic, (C5-C25) aromatic ring, whose carbon atom(s) may be replaced with at least one heteroatom selected from nitrogen, oxygen, and sulfur;

R 5 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 25-membered)heteroaryl;

the heteroaryl contains at least one heteroatom selected from B, N, O, S, Si, and P;

a to d are as defined in claim 1 ; and

with the proviso, when a represents 2, two R 1 are not fused with the aryl ring to which they are attached to form a carbazole ring.

4. The organic electroluminescent compound according to claim 1 , wherein formula 1 is represented by the following formula 3:

wherein

R 1 to R 4 , each independently, represent a substituted or unsubstituted (C6-C25)aryl, a substituted or unsubstituted (5- to 25-membered)heteroaryl, or a substituted or unsubstituted di(C6-C25)arylamino; or are linked to adjacent R 1 to R 4 , respectively, to form a substituted or unsubstituted, mono- or polycyclic, (C5-C25) aromatic ring, whose carbon atom(s) may be replaced with at least one heteroatom selected from nitrogen, oxygen, and sulfur;

the heteroaryl contains at least one heteroatom selected from B, N, O, S, Si, and P; and

a to d are as defined in claim 1 .

5. The organic electroluminescent compound according to claim 1 , wherein formula 1 is represented by the following formula 4:

wherein

R 1 to R 4 , each independently, represent a substituted or unsubstituted (C6-C25)aryl, a substituted or unsubstituted (5- to 25-membered)heteroaryl, or a substituted or unsubstituted di(C6-C25)arylamino; or are linked to adjacent R 1 to R 4 , respectively, to form a substituted or unsubstituted, mono- or polycyclic, (C5-C25) aromatic ring, whose carbon atom(s) may be replaced with at least one heteroatom selected from nitrogen, oxygen, and sulfur;

the heteroaryl contains at least one heteroatom selected from B, N, O, S, Si, and P; and

a to d are as defined in claim 1 .

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

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

8. The organic electroluminescent material according to claim 7 , wherein the organic electroluminescent material is a host material or an electron buffer material.

9. The organic electroluminescent material according to claim 7 , wherein the organic electroluminescent material is a host material comprising at least one of a first host compound and at least one of a second host compound, wherein the first host compound comprises the compound represented by the formula 1, and wherein the second host compound comprises the compound represented by the following formula 5:

wherein

Ma represents a substituted or unsubstituted nitrogen-containing (5- to 30-membered)heteroaryl;

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

one of V and W represents a single bond, and the other of V and W represents any one of NR 6 , CR 7 R 8 , S and O;

Xa to Xi, each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, or a substituted or unsubstituted mono- or di-(C6-C30)arylamino; or may be linked to adjacent Xa to Xi, respectively, to form a substituted or unsubstituted mono- or polycyclic (C3-C30), alicyclic or aromatic ring, or the combination thereof, whose carbon atom(s) may be replaced with at least one heteroatom selected from nitrogen, oxygen, and sulfur;

R 6 to R 8 , each independently, represent hydrogen, deuterium, a halogen, a cyano, a carboxyl, a nitro, a 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; and

the heteroaryl contains at least one heteroatom selected from B, N, O, S, Si, and P.

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