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 and a second host material, wherein the first host material comprises a compound represented by the following formula 1 and the second host material comprises a compound represented by the following formula 2:

wherein,

X 1 and Y 1 each independently represent, —N═, —NR 5 —, —O—, or —S—, provided that any one of X 1 and Y 1 is —N═, and other of X 1 and Y 1 is —NR 5 —, —O— or —S—;

L 1 represents a single bond or a substituted or unsubstituted (C6-C30)arylene;

Ar 1 represents a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, or a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino;

R 11 represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

R 12 to R 14 and R 5 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 fused ring of a substituted or unsubstituted (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, 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-(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 the adjacent substituent(s) to form a ring(s); and

a and b each independently represent an integer of 1 or 2, c represents an integer of 1 to 4, and when a to c are an integer of 2 or more, each of R 12 to R 14 may be the same or different;

wherein,

X 2 represents O, S, or CR 7 R 8 ;

R 1 to 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 fused ring of a substituted or unsubstituted (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, 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-(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;

at least one of R 1 to R 4 is a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)heteroarylamino, or a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino, with the proviso that the case where any one of R 1 to R 4 is triphenylene is excluded;

R 7 and R 8 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 ring(s); and

a′ and d′ each independently represent, an integer of 1 to 4, b′ and c′ each independently represent an integer of 1 or 2, and when a′ to d′ represent an integer of 2 or more, each of R 1 to R 4 may be the same or different.

2 . The plurality of host materials according to claim 1 , wherein the compound represented by the formula 1 is represented by any one of the following formulas 1-1 to 1-3:

wherein,

X 1 , Y 1 , Ar 1 , L 1 , R 11 to R 14 , a, and b are as defined in claim 1 ; and

d represents an integer of 1 to 3, and when d is an integer of 2 or more, each of R 14 may be the same or different.

3 . The plurality of host materials according to claim 1 , wherein the compound represented by the formula 2 is represented by the following formula 2-1 or 2-2:

wherein,

X 2 , R 1 to R 4 , and a′ to c′ are as defined in claim 1 ;

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

Z 1 to Z 3 each independently represent, N or CH, provided that at least one of Z 1 to Z 3 is N;

Ar 2 to Ar 5 each independently represent, a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl; and

e′ represents an integer of 1 to 4, and when e′ is an integer of 2 or more, each of R 4 may be the same or different.

4 . The plurality of host materials according to claim 1 , wherein Ar 1 in the formula 1 represents a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted p-terphenyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted o-terphenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted benzophenanthrenyl, a substituted or unsubstituted fluoranthenyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted benzofluorenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted spirobifluorenyl, a substituted or unsubstituted spiro[fluoren-benzofluoren]yl, a substituted or unsubstituted pyrimidyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted benzofuropyrimidinyl, or an amino substituted with at least one substituent selected from the group consisting of substituted or unsubstituted phenyl, naphthyl, o-biphenyl, m-biphenyl, p-biphenyl, terphenyl, phenanthrenyl, substituted or unsubstituted fluorenyl, a substituted or unsubstituted carbazolyl, dibenzofuranyl, and dibenzothiophenyl.

5 . The plurality of host materials according to claim 1 , wherein substituents in the substituted (C1-C30)alkyl, the substituted (C6-C30)aryl(ene), the substituted (3- to 30-membered)heteroaryl(ene), the substituted (C1-C30)alkoxy, the fused ring of the substituted (C3-C30) aliphatic ring and the (C6-C30) aromatic ring, 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-(C2-C30)alkenylamino, the substituted (C1-C30)alkyl(C2-C30)alkenylamino, the substituted mono- or di-(C6-C30)arylamino, the substituted (C1-C30)alkyl(C6-C30)arylamino, the substituted mono- or di-(3- to 30-membered)heteroarylamino, the substituted (C1-C30)alkyl(3- to 30-membered)heteroarylamino, the substituted (C2-C30)alkenyl(C6-C30)arylamino, the substituted (C2-C30)alkenyl(3- to 30-membered)heteroarylamino, the substituted (C6-C30)aryl(3- to 30-membered)heteroarylamino, and the substituted ring, each independently represent at least one selected from the group consisting of deuterium, halogen, cyano, carboxyl, nitro, hydroxy, (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, a (5- to 30-membered)heteroaryl unsubstituted or substituted with (C6-C30)aryl, an (C6-C30)aryl unsubstituted or substituted with (5- to 30-membered)heteroaryl, 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, a mono- or di-(C6-C30)arylamino unsubstituted or substituted with (C1-C30)alkyl, (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.

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

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

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

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

wherein,

X 2 represents O, S, or CR 7 R 8 ;

R 7 and R 8 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 ring(s);

R 21 to R 32 each independently represent, hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a fused ring of a substituted or unsubstituted (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-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, or *-L 1 -NAr 1 Ar 2 ; provided that at least one of R 21 to R 22 is *-L 1 -NAr 1 Ar 2 ;

L 1 represents a single bond, a substituted or unsubstituted (C10-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene; and

Ar 1 and Ar 2 each independently represent, a substituted or unsubstituted (3- to 30-membered)heteroaryl; provided that the case where all of Ar 1 and Ar 2 are carbazole is excluded.

10 . The organic electroluminescent compound according to claim 9 , wherein the organic electroluminescent compound represented by the formula 2′ is selected from the following compounds:

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

wherein,

X 2 represents O or S;

R 21 to R 32 each independently represent, hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a fused ring of a substituted or unsubstituted (C3-C30) aliphatic ring and a (C6-C30) aromatic ring, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-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, or *-L 2 -HAr, provided that at least one of R 21 to R 24 and R 29 to R 32 is *-L 2 -HAr;

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

HAr represents a substituted or unsubstituted triazinyl or a substituted or unsubstituted quinoxalinyl; and

with the proviso that the following compounds are excluded from the organic electroluminescent compound represented by formula 2″.

12 . The organic electroluminescent compound according to claim 11 , wherein the organic electroluminescent compound represented by the formula 2″ is selected from the following compounds:

13 . An organic electroluminescent device comprising an organic electroluminescent compound according to claim 9 .

14 . An organic electroluminescent device comprising an organic electroluminescent compound according to claim 11 .