Plurality of host materials and organic electroluminescent device comprising the same
The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds as a host material, it is possible to provide an organic electroluminescent device having higher luminous efficiency and/or improved lifespan characteristics compared to conventional organic electroluminescent devices.
1 . A plurality of host materials comprising a first host material comprising a compound represented by the following formula 1-2, and a second host material comprising a compound represented by the following formula 2-1:
wherein
X 1 represents —N═;
Y 1 represents —O— or —S;
L 1 represents a single bond;
Ar 1 represents a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted phenylbiphenylamino, a substituted or unsubstituted phenylnaphthylamino, a substituted or unsubstituted phenylterphenylamino, a substituted or unsubstituted phenylfluorenylamino, a substituted or unsubstituted naphthylbiphenylamino, a substituted or unsubstituted naphthylterphenylamino, a substituted or unsubstituted naphthylphenanthrenylamino, a substituted or unsubstituted dinaphthylamino, a substituted or unsubstituted phenylcarbazolylamino, a substituted or unsubstituted phenyldibenzofuranylamino, a substituted or unsubstituted biphenyldibenzofuranylamino, a substituted or unsubstituted biphenyldibenzothiophenylamino-, a substituted or unsubstituted terphenyldibenzofuranylamino, a substituted or unsubstituted terphenyldibenzothiophenylamino or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino;
R 1 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
R 2 to R 4 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 mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino; or adjacent substituents may be linked to each other to form a ring(s);
a and b each independently represent 1 or 2, and c represents an integer of 1 to 3, where if a to c are an integer of 2 or more, each R 2 to each R 4 may be the same or different;
wherein
A 2 , A 4 , and A 6 each independently represent N;
A 1 , A 3 , and A 5 each independently represent CR 10 ;
R 10 of A 1 represents -L 2 -Ar 2 wherein L 2 represents a single bond or a substituted or unsubstituted (C6-C30)arylene; and Ar 2 represents a substituted or unsubstituted naphthyl, or a substituted or unsubstituted naphthylphenyl;
R 10 of A 3 represents -L 2 -Ar 2 wherein L 2 represents a single bond or a substituted or unsubstituted (C6-C30)arylene; and Ar 2 represents a substituted or unsubstituted (C6-C30)aryl;
R 10 of A 5 represents -L 2 -Ar 2 wherein L 2 represents, a deuterium-substituted or unsubstituted naphthylene, a deuterium-substituted or unsubstituted phenylnaphthylene, or a deuterium-substituted or unsubstituted naphthylphenylene; and Ar 2 represents the following formula 3;
with the proviso L 2 of A 1 , L 2 of A 3 , and L 2 of A 5 do not simultaneously represent a single bond;
Y represents O, S, or NR 21 ;
R 21 represents a substituted or unsubstituted (C6-C30)aryl;
R 14 or R 15 is a bonding site with L 2 ; or R 11 to R 18 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 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-(C6-C30)arylamino, or a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino; or may be linked to an adjacent substituent to form a ring(s); and
d represents an integer of 3.
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 cycloalkyl, the substituted alkoxy, the substituted trialkylsilyl, the substituted dialkylarylsilyl, the substituted alkyldiarylsilyl, the substituted triarylsilyl, the substituted mono- or di-alkylamino, the substituted mono- or di-arylamino, the substituted phenylbiphenylamino, the substituted phenylnaphthylamino, the substituted phenylterphenylamino, the substituted phenylfluorenylamino, the substituted naphthylbiphenylamino, the substituted naphthylterphenylamino, the substituted naphthylphenanthrenylamino, the substituted dinaphthylamino, the substituted phenylcarbazolylamino, the substituted phenyldibenzofuranylamino, the substituted biphenyldibenzofuranylamino, the substituted biphenyldibenzothiophenylamino, the substituted terphenyldibenzofuranylamino, the substituted terphenyldibenzothiophenylamino, and the substituted alkylarylamino in L 2 , Ar 1 , R 1 to R 4 , R 11 to R 18 , and R 21 each independently are at least one selected from the group consisting of deuterium; a halogen; a cyano; a carboxyl; a nitro; a hydroxyl; 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 a (C6-C30)aryl(s); a (C6-C30)aryl unsubstituted or substituted with at least one of a (C1-C30)alkyl(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)arylsilyl; an amino; a mono- or di-(C1-C30)alkylamino; a mono- or di-(C6-C30)arylamino; a (C1-C30)alkyl(C6-C30)arylamino; a (C1-C30)alkylcarbonyl; a (C1-C30)alkoxycarbonyl; a (C6-C30)arylcarbonyl; 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 in formula 1-2, Ar 1 represents a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted naphthylphenyl, a substituted or unsubstituted phenylnaphthyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted benzophenanthrenyl, a substituted or unsubstituted chrysenyl, 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[cyclopentane-fluorene]yl, a substituted or unsubstituted spiro[indane-fluorene]yl, a substituted or unsubstituted spiro[fluorene-benzofluorene]yl, a substituted or unsubstituted nitrogen-containing 23-membered heteroaryl, a substituted or unsubstituted phenylbiphenylamino, a substituted or unsubstituted phenylnaphthylamino, a substituted or unsubstituted phenylterphenylamino, a substituted or unsubstituted phenylfluorenylamino, a substituted or unsubstituted naphthylbiphenylamino, a substituted or unsubstituted naphthylterphenylamino, a substituted or unsubstituted naphthylphenanthrenylamino, a substituted or unsubstituted dinaphthylamino, a substituted or unsubstituted phenylcarbazolylamino, a substituted or unsubstituted phenyldibenzofuranylamino, a substituted or unsubstituted biphenyldibenzofuranylamino, or a substituted or unsubstituted biphenyldibenzothiophenylamino.
4 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 1-2 is at least one selected from the following compounds;
5 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 2-1 is at least one selected from the following compounds:
6 . 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 .