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 1-2 and the second host material comprises a compound represented by the following formula 2:

R 1 to R 6 each independently represent, hydrogen, deuterium, 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 1 to R 6 is *-L 1 -NAr 1 Ar 2 ;

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 23 and R 24 each independently represent, hydrogen, deuterium, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered) heteroaryl; and

R 25 to R 28 each independently 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 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;

(Ar 11 -L 11 ) a -HAr  (2)

wherein,

HAr represents a substituted or unsubstituted nitrogen-containing (3-to 20-membered)heteroaryl;

L 11 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;

Ar 11 represents 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, a substituted or unsubstituted tri(C6-C30)arylsilyl, or *-L 1 -NAr 1 Ar 2 ;

L 21 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene,

Ar 21 and Ar 22 each independently represent, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; and

a represents an integer of 1 to 3, and when a represents an integer of 2 or more, each of -(L 11 -Ar 11 ) may be the same or different.

2 . The plurality of host materials according to claim 1 , wherein L 1 , L 11 , and L 21 each independently represent, a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted p-biphenylene, a substituted or unsubstituted m-biphenylene, a substituted or unsubstituted o-biphenylene, a substituted or unsubstituted terphenylene, a substituted or unsubstituted naphthalenylene, a substituted or unsubstituted phenylnaphthalenylene, a substituted or unsubstituted naphthylphenylene, a substituted or unsubstituted binaphthalenylene, a substituted or unsubstituted pyrimidylphenylene, a substituted or unsubstituted phenanthrenylene, a substituted or unsubstituted triphenylenylene, a substituted or unsubstituted chrysenylene, a substituted or unsubstituted fluorenylene, a substituted or unsubstituted pyridylene, a substituted or unsubstituted pyrimidylene, a substituted or unsubstituted dibenzofuranylene, a substituted or unsubstituted phenanthrooxazolylene, a substituted or unsubstituted phenanthrothiazolylene, a substituted or unsubstituted triazinylene, a substituted or unsubstituted quinoxalinylene, a substituted or unsubstituted quinazolinylene, or a substituted or unsubstituted benzoquinoxalinylene.

3 . The plurality of host materials according to claim 1 , wherein Ar 1 , Ar 2 , Ar 21 , and Ar 22 each independently represent, 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 fluorenyl, a substituted or unsubstituted spirobifluorenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted chrysenyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted benzofluorenyl, or a substituted or unsubstituted dihydrophenanthrenyl.

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

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

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