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

1 . A plurality of host materials comprising a first host material comprising a compound represented by the following formula 1, and a second host material comprising a compound represented by the following formula 2:

wherein

X 1 and Y 1 , each independently, represent —N═, —NR 7 —, —O—, or —S—, with the proviso that any one of X 1 and Y 1 represents —N═, and the other of X 1 and Y represents —NR 7 —, —O—, or —S—;

R 1 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

R 2 to R 7 , 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(s) and a (C6-C30) aromatic ring(s), a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)alkenylamino, a substituted or unsubstituted (C1-C30)alkyl(C2-C30)alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C1-C30)alkyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C2-C30)alkenyl(C6-C30)arylamino, a substituted or unsubstituted (C2-C30)alkenyl(3- to 30-membered)heteroarylamino, or a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino; or may be linked to an adjacent substituent to form a ring(s);

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

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

wherein

T 5 and T 6 are linked to each other to form a ring represented by the following formula 3; or T 7 and T 8 are linked to each other to form a ring represented by the following formula 3; or T 5 and T 6 are linked to each other to form a ring represented by the following formula 3, and T 7 and T 8 are also linked to each other to form a ring represented by the following formula 3:

in formulas 2 and 3,

T 1 to T 4 , T 9 to T 14 , and T 5 to T 6 not forming a ring, 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)arysilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)alkenylamino, a substituted or unsubstituted (C1-C30)alkyl(C2-C30)alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C1-C30)alkyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C2-C30)alkenyl(C6-C30)arylamino, a substituted or unsubstituted (C2-C30)alkenyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino, or -L 2 -Ar 2 ; with the proviso that at least one of T 1 to T 14 represents -L 2 -Ar 2 ;

L 2 , each independently, represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;

Ar 2 , each independently, represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

represents a fusion site with formula 2; and

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

2 . The plurality of host materials according to claim 1 , wherein the substituents of the substituted alkyl, the substituted aryl, the substituted arylene, the substituted heteroaryl, the substituted heteroarylene, the substituted cycloalkyl, the substituted alkoxy, the substituted trialkylsilyl, the substituted dialkylarylsilyl, the substituted alkyldiarylsilyl, the substituted triarylsilyl, the substituted fused ring group of a aliphatic ring(s) and a aromatic ring(s), the substituted mono- or di-alkylamino, the substituted mono- or di-alkenylamino, the substituted alkylalkenylamino, the substituted mono- or di-arylamino, the substituted alkylarylamino, the substituted mono- or di-heteroarylamino, the substituted alkylheteroarylamino, the substituted alkenylarylamino, the substituted alkenylheteroarylamino, and the substituted arylheteroarylamino, 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 (3- to 30-membered)heteroaryl unsubstituted or substituted with at least one of a (C1-C30)alkyl(s) and a (C6-C30)aryl(s); a (C6-C30)aryl unsubstituted or substituted with at least one of deuterium, a cyano(s), a (C1-C30)alkyl(s), a (C3-C30)cycloalkyl(s), a tri(C1-C30)alkylsilyl(s), and a (3- 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)arysilyl; a fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s); 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 represented by at least one of the following formulas 1-1 to 1-3:

wherein,

R 1 to R 6 , L 1 , and a to d are as defined in claim 1 .

4 . The plurality of host materials according to claim 1 , where in formula 1, R 1 , R 5 , and R 6 , each independently, represent a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted benzofluorenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted spirobifluorenyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted benzoquinazolinyl, a substituted or unsubstituted benzoquinoxalinyl, a substituted or unsubstituted benzofuropyrmidinyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted benzothiophenyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted benzofuranyl, a substituted or unsubstituted naphthyridinyl, a substituted or unsubstituted benzonaphthofuranyl, or a substituted or unsubstituted benzonaphthothiophenyl.

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

wherein,

T 1 to T 4 , and T 9 to T 14 are as defined in claim 1 , and T 5 to T 8 are defined as T 5 to T 8 not forming a ring in claim 1 .

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

wherein,

T 1 to T 14 , 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(s) and a (C6-C30) aromatic ring(s), a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)alkenylamino, a substituted or unsubstituted (C1-C30)alkyl(C2-C30)alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C1-C30)alkyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C2-C30)alkenyl(C6-C30)arylamino, a substituted or unsubstituted (C2-C30)alkenyl(3- to 30-membered)heteroarylamino, or a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino; and

L 2 and Ar 2 are as defined in claim 1 .

7 . 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:

8 . 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:

9 . 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 layer of the light-emitting layers comprises the plurality of host materials according to claim 1 .

10 . An organic electroluminescent compound represented by the following formula 2:

wherein

T 5 and T 6 are linked to each other to form a ring represented by the following formula 3; or T 7 and T 8 are linked to each other to form a ring represented by the following formula 3:

and in formulas 2 and 3,

T 1 to T 4 , T 9 to T 14 , and T 5 to T 8 not forming a ring, 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)arysilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted fused ring group of a (C3-C30) aliphatic ring(s) and a (C6-C30) aromatic ring(s), a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)alkenylamino, a substituted or unsubstituted (C1-C30)alkyl(C2-C30)alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C1-C30)alkyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C2-C30)alkenyl(C6-C30)arylamino, a substituted or unsubstituted (C2-C30)alkenyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino, or -L 2 -Ar 2 ; with the proviso that at least one of T 1 to T 4 , T 11 to T 14 , and T 5 to T 8 not forming a ring represents -L 2 -Ar 2 ;

L 2 , each independently, represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;

Ar 2 , each independently, represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

represents a fusion site with formula 2; and

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

11 . The organic electroluminescent compound according to claim 10 , wherein the formula 2 is represented by at least one of the following formulas 2-1 and 2-2:

wherein,

T 1 to T 4 , and T 9 to T 14 are as defined in claim 10 , and T 5 to T 6 are defined as T 5 to T 8 not forming a ring in claim 10 .

12 . The organic electroluminescent compound according to claim 10 , wherein the formula 2 is represented by at least one of the following formulas:

wherein,

T 1 to T 14 , 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(s) and a (C6-C30) aromatic ring(s), a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)alkenylamino, a substituted or unsubstituted (C1-C30)alkyl(C2-C30)alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C1-C30)alkyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C2-C30)alkenyl(C6-C30)arylamino, a substituted or unsubstituted (C2-C30)alkenyl(3- to 30-membered)heteroarylamino, or a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino; and

L 2 and Ar 2 are as defined in claim 10 .

13 . The organic electroluminescent compound according to claim 10 , wherein the arylene of L 2 represents a 1,2-phenylene, a 1,3-phenylene, a 1,4-phenylene, a 1,2-biphenylene, a 1,3-biphenylene, a 1,4-biphenylene, a 1,2-terphenylene, a 1,3-terphenylene, a 1,4-terphenylene, a 1,2-naphthylene, a 1,3-naphthylene, a 1,4-naphthylene, a 1,5-naphthylene, a 1,6-naphthylene, a 1,7-naphthylene, a 1,8-naphthylene, a 2,3-naphthylene, a 2,6-naphthylene, a 2,7-naphthylene, or a phenanthrenylene.

14 . The organic electroluminescent compound according to claim 10 , wherein the heteroaryl of Ar 2 represents a pyridyl, a pyrimidinyl, a triazinyl, a quinazolinyl, a benzoquinazolinyl, a dibenzoquinazolinyl, a quinoxalinyl, a benzoquinoxalinyl, a dibenzoquinoxalinyl, a quinolyl, a benzoquinolyl, an isoquinolyl, a naphthyridinyl, a benzoisoquinolyl, an imidazolyl, a benzimidazolyl, a phenanthroimidazolyl, a thiazolyl, a benzothiazolyl, a phenanthrothiazolyl, an oxazolyl, a benzoxazolyl, a phenanthro oxazolyl, a naphtho oxazolyl, a naphthothiazolyl, a benzothienopyrimidinyl, a benzothienopyrazinyl, a benzofuropyrimidinyl, a benzofuropyrazinyl, a benzothienoquinolyl, a benzofuroquinolyl, an acenaphthopyrimidinyl, a benzobenzofurophenanthridinyl, a carbazolyl, a dibenzofuranyl, a dibenzothiophenyl, a benzonaphthofuranyl, a benzonaphthothiophenyl, a benzocarbazolyl, a dibenzocarbazolyl, a phenoxazinyl, or a benzoperimidinyl.

15 . The organic electroluminescent compound according to claim 10 , wherein the compound represented by formula 2 is at least one selected from the following compounds:

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