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:

wherein,

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

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

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

R 2 to 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 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 of (C3-C30) aliphatic ring and (C6-C30) aromatic ring, or -L 2 -N(Ar′)(Ar″); or may be linked to the adjacent substituents to form a ring(s);

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

Ar′ and Ar″ each independently represent, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted fused ring of (C3-C30) aliphatic ring and (C6-C30) aromatic ring, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

a is 1, b and c each independently represent, an integer of 1 or 2, and d represents an integer of 1 to 4; and

when b to d are an integer of 2 or more, each of R 2 to R 4 may be the same or different;

wherein,

R 11 to R 14 each independently represent, *-(L 3 ) e -(Ar 3 ) f , 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 substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; or may be linked to the adjacent substituents to form a ring(s);

R 15 to R 22 each independently represent, *-(L 3 ) e -(Ar 3 ) f , 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 substituted or unsubstituted fused ring of (C3-C30) aliphatic ring and (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, or a substituted or unsubstituted tri(C6-C30)arylsilyl; or may be linked to the adjacent substituents to form a ring(s); provided that at least one of R 11 to R 22 is *-(L 3 ) e -(Ar 3 ) f ;

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

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

e represents an integer of 1 to 4, and f represents an integer of 1 or 2; and

when e and f are an integer of 2 or more, each of L 3 and each of Ar 3 may be the same or different.

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

wherein,

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

3 . The plurality of host materials according to claim 1 , wherein the formula 2 is represented by any one of the following formulas 2-1 to 2-4:

wherein,

R 11 to R 22 , L 3 , Ar 3 , e, and f are as defined in claim 1 .

4 . The plurality of host materials according to claim 1 , wherein R 1 , Ar 1 , and Ar 2 of formula 1 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 anthracenyl, 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 benzofuropyridyl, a substituted or unsubstituted benzofuropyrimidinyl, 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 L 3 of formula 2 represents a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted terphenylene, a substituted or unsubstituted naphthalenylene, a substituted or unsubstituted phenanthrenylene, a substituted or unsubstituted triphenylenylene, a substituted or unsubstituted fluorenylene, a substituted or unsubstituted pyridylene, a substituted or unsubstituted triazinylene, a substituted or unsubstituted carbazolylene, a substituted or unsubstituted quinoxalinylene, a substituted or unsubstituted quinazolinylene, a substituted or unsubstituted dibenzofuranylene, or a substituted or unsubstituted benzoquinoxalinylene.

6 . The plurality of host materials according to claim 1 , wherein a substituted or unsubstituted (3- to 30-membered)heteroaryl of Ar 3 in formula 2 represents a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted triazinyl, a substituted or unsubstituted pyrazinyl, a substituted or unsubstituted quinolinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted benzoquinolinyl, a substituted or unsubstituted benzoquinazolinyl, a substituted or unsubstituted benzoquinoxalinyl, a substituted or unsubstituted dibenzoquinolinyl, a substituted or unsubstituted dibenzoquinazolinyl, a substituted or unsubstituted dibenzoquinoxalinyl, a substituted or unsubstituted indenopyridyl, a substituted or unsubstituted indenopyrimidinyl, a substituted or unsubstituted indenopyrazinyl, a substituted or unsubstituted benzofuropyridyl, a substituted or unsubstituted benzofuropyrimidinyl, a substituted or unsubstituted benzofuropyrazinyl, a substituted or unsubstituted benzothiopyridyl, a substituted or unsubstituted benzothiopyrimidinyl, a substituted or unsubstituted benzothiopyrazinyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted benzocarbazolyl, a substituted or unsubstituted dibenzofuranyl, or a substituted or unsubstituted dibenzothiophenyl.

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

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

9 . An organic electroluminescent device comprising: a first electrode; a second electrode; and at least one light-emitting layer(s) between the first electrode and the second electrode, wherein the at least one light-emitting layer(s) comprises the plurality of host materials according to claim 1 .