ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME

1 . A plurality of host materials comprising at least one first host compound and at least one second host compound, wherein the first host compound is represented by the following formula 1, and the second host compound is represented by the following formula 2:

in formula 1,

X 1 to X 3 each independently represent CR′ or N;

R′ each independently represents hydrogen, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 );

Ar 1 to Ar 3 each independently represent hydrogen, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 );

R 1 to R 8 each independently represent hydrogen, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 ), or a substituent represented by the following formula 1-1, or the adjacent two of R 1 to R 8 may be fused to form a ring represented by the following formula 1-2, with a proviso that formula 1 comprises at least one structure selected from formulas 1-1 and 1-2, and when R 2 or R 7 is formula 1-1, the carbazole parent structure is not bonded at carbon positions of 1 and 2 of formula 1-1;

W and Y each independently represent O or S;

R 9 to R 11 each independently represent hydrogen, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 );

a to c are each independently an integer of 1 to 5, d is an integer of 1 to 3, and e and f are each independently an integer of 1 to 4, where if a to f are each an integer of 2 or more, each of Ar 1 to Ar 3 and each of R 9 to R 11 may be the same or different; and

* represents a bonding position with the carbazole parent structure:

in formula 2,

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

Ar a represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

R 12 and R 13 each independently represent hydrogen, 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 50-membered)heteroaryl, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 ); or may be linked to an adjacent substituent to form a ring(s);

g and h are each independently an integer of 1 to 4; and

if g and h are each an integer of 2 or more, each of R 12 and each of R 13 may be the same or different;

in formulas 1 and 2,

L 1 each independently represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and

Ar 4 and Ar 5 each independently represent hydrogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl.

2 . The plurality of host materials according to claim 1 , wherein the substituents of the substituted alkyl, the substituted alkenyl, the substituted aryl(ene), the substituted heteroaryl(ene), the substituted cycloalkyl, the substituted alkoxy, the substituted trialkylsilyl, the substituted dialkylarylsilyl, the substituted alkyldiarylsilyl, the substituted triarylsilyl, and the substituted fused ring group of an aliphatic ring(s) and an aromatic ring(s), each independently, are at least one selected from the group consisting of deuterium; a halogen; a cyano; a carboxyl; a nitro; a hydroxyl; a phosphine oxide; 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 at least one (C6-C30)aryl(s); a (C6-C30)aryl unsubstituted or substituted with at least one (5- to 30-membered)heteroaryl(s); 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; a fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring; an amino; a mono- or di-(C1-C30)alkylamino; a mono- or di-(C2-C30)alkenylamino; a (C1-C30)alkyl(C2-C30)alkenylamino; a mono- or di-(C6-C30)arylamino; a (C1-C30)alkyl(C6-C30)arylamino; a mono- or di-(3- to 30-membered)heteroarylamino; a (C1-C30)alkyl(3- to 30-membered)heteroarylamino; a (C2-C30)alkenyl(C6-C30)arylamino: a (C2-C30)alkenyl(3- to 30-membered)heteroarylamino; a (C6-C30)aryl(3- to 30-membered)heteroarylamino: a (C1-C30)alkylcarbonyl; a (C1-C30)alkoxycarbonyl; a (C6-C30)arylcarbonyl; a (C6-C30)arylphosphine; 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 plurality of host materials according to claim 1 , wherein the formula 1 is re resented by at least one of the following formulas 1-3 to 1-13:

in formulas 1-3 to 1-13,

X 1 to X 3 , Ar 1 , to Ar 3 , R 1 to R 11 , W, Y, and a to f are as defined in claim 1 .

4 . The plurality of host materials according to claim 1 , wherein the formula 2 is represented by at least one or the following formulas 2-1 and 22:

in formulas 2-1 and 2-2,

L a , Ar a , R 12 , R 13 and g are as defined in claim 1 ;

T 1 and T 2 each independently represent a single bond, O or S;

L b and L c are the same as the definition of L a in claim 1 ;

Ar b is the same as the definition of Ar a in claim 1 ;

R 14 to R 16 each independently are the same as the definition of R 12 in claim 1 ;

T 3 represents O, S or NR″;

R″ represents a substituted or unsubstituted (C6-C30)aryl;

h′ and i are each independently an integer of 1 to 3, j and k are each independently an integer of 1 to 4, and h″ is an integer of 1 to 2; and

if h′, h″ and i to k are an integer of 2 or more, each of R 13 to each of R 16 may be the same or different.

5 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 1 is at least one selected from the following compounds:

6 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 2 is at least one selected from the following compounds:

7 . An organic electroluminescent device comprising an anode, a cathode, and at least one light-emitting layer between the anode and the cathode, wherein at least one of the light-emitting layers comprises the plurality of host materials according to claim 1 .

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

in formula 1,

X 1 to X 3 each independently represent CR′ or N;

R′ each independently represents hydrogen, 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)arylsiyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 );

Ar 1 to Ar 3 each independently represent hydrogen, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 );

R 1 to R 8 each independently represent hydrogen, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 ), or a substituent represented by the following formula 1-1, or the adjacent two of R 1 to R 8 may be fused to form a ring represented by the following formula 1-2, with a proviso that formula 1 comprises at least one structure selected from formulas 1-1 and 1-2, and when R 2 or R 7 is formula 1-1, the carbazole parent structure is not bonded at carbon positions of 1 and 2 of formula 1-1;

W and Y each independently represent O or S;

R 9 to R 11 each independently represent hydrogen, 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 fused ring group of a (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, or -L 1 -N—(Ar 4 )(Ar 5 );

a to c are each independently an integer of 1 to 5, d is an integer of 1 to 3, and e and f are each independently an integer of 1 to 4, where if a to f are each an integer of 2 or more, each of Ar 1 to Ar 3 and each of R 9 to R 11 may be the same or different; and

* represents a bonding position with the carbazole parent structure.

9 . The organic electroluminescent compound according to claim 8 , wherein the formula 1 is represented by any one of the following formulas 1-3 to 1-13:

in formulas 1-3 to 1-13,

X 1 to X 3 , Ar 1 to Ar 3 , R 1 to R 11 , W, Y, and a to f are as defined in claim 8 .

10 . The organic electroluminescent compound according to claim 8 , wherein the compound represented by formula 1 is any one selected from the following compounds:

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

12 . An organic electroluminescent device comprising the organic electroluminescent compound according to claim 8 .