PLURALITY OF HOST MATERIALS, ORGANIC ELECTROLUMINESCENT COMPOUND, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
The present disclosure relates to a plurality of host materials, an organic electroluminescent compound, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.
1 . A plurality of host materials comprising a first host material(s) comprising the compound represented by the following formula 1, and a second host material(s) comprising the compound represented by the following formula 2:
in formula 1,
X represents O, S or Se;
HAr represents a substituted or unsubstituted (3- to 30-membered)heteroaryl containing at least one nitrogen atom;
L represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
R 1 and R 2 , each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, or —SiR 11 R 12 R 13 ;
R 11 to R 13 , 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; and
a represents an integer of 1 to 4, and b represents an integer of 1 to 3, in which if each of a and b is an integer of 2 or more, each of R 1 and each of R 2 may be the same or different;
in formula 2,
A 1 and A 2 , each independently, represent a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, or a substituted or unsubstituted carbazolyl;
X 11 to X 26 , each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl; and
one of X 15 to X 18 and one of X 19 to X 22 are linked to each other to form a single bond,
with the proviso that at least one of X 11 , X 18 , X 19 and X 26 is deuterium.
2 . The plurality of host materials according to claim 1 , wherein HAr is a substituted or unsubstituted triazinyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted quinazolinyl, a substituted or unsubstituted benzoquinazolinyl, a substituted or unsubstituted quinoxalinyl, a substituted or unsubstituted benzoquinoxalinyl, a substituted or unsubstituted quinolyl, a substituted or unsubstituted benzoquinolyl, a substituted or unsubstituted isoquinolyl, a substituted or unsubstituted benzoisoquinolyl, a substituted or unsubstituted triazolyl, a substituted or unsubstituted pyrazolyl, a substituted or unsubstituted naphthyridinyl, a substituted or unsubstituted benzothienopyrimidinyl, a substituted or unsubstituted carbazolyl, or a substituted or unsubstituted pyridopyrazinyl.
3 . The plurality of host materials according to claim 1 , wherein the formula 1 is represented by the following formula 1-1:
in formula 1-1,
X, R 1 , R 2 , L, a, and b are as defined in claim 1 ,
X′ 1 to X′ 3 , each independently, represent CR′ or N, in which R′ represents hydrogen or deuterium, and at least two of X′ 1 to X′ 3 represent N; and
R 3 and R 4 , each independently, represent a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl.
4 . The plurality of host materials according to claim 3 , wherein the formula 1-1 is represented by any one of the following formulas 1-1-1 to 1-1-4:
in formulas 1-1-1 to 1-1-4,
X, X′ 1 to X′ 3 , R 1 to R 4 , L, a, and b are as defined in claim 3 .
5 . 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 2-8:
in formulas 2-1 to 2-8,
A 1 , A 2 , and X 11 to X 26 are as defined in claim 1 .
6 . The plurality of host materials according to claim 1 , wherein A 1 and A 2 in formula 2, each independently, are a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted benzofluorenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted fluoranthenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted carbazolyl, or a substituted or unsubstituted dibenzothiophenyl.
7 . The plurality of host materials according to claim 1 , wherein the compound represented by formula 1 is at least one selected from the group consisting of 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 group consisting of the following compounds:
in the compounds above, Dn represents that n number of hydrogens are replaced with deuterium, and n is an integer of 1 to 50.
9 . The plurality of host materials according to claim 1 , wherein the substituent(s) of the substituted alkyl, the substituted aryl, the substituted arylene, the substituted heteroaryl, the substituted heteroarylene, the substituted dibenzofuranyl, the substituted dibenzothiophenyl, and the substituted carbazolyl, 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 unsubstituted or substituted with deuterium; 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 deuterium, a (C1-C30)alkyl(s), a (C6-C30)aryl(s), a (3- to 50-membered)heteroaryl(s), and a di(C6-C30)arylamino(s); a (C6-C30)aryl unsubstituted or substituted with at least one of deuterium, a cyano(s), a (C1-C30)alkyl(s), a (3- to 30-membered)heteroaryl(s), a mono- or di-(C6-C30)arylamino(s), and a tri(C6-C30)arylsilyl(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-(C2-C30)alkenylamino; a mono- or di-(C6-C30)arylamino; a mono- or di-(3- to 30-membered)heteroarylamino; a (C1-C30)alkyl(C2-C30)alkenylamino; a (C1-C30)alkyl(C6-C30)arylamino; 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 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.
10 . 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 of the light-emitting layers comprises the plurality of host materials according to claim 1 .
11 . An organic electroluminescent compound represented by the following formula 1-A:
in formula 1-A,
X a represents O or S; and
R 41 to R 48 , each independently, represent hydrogen, deuterium, or a (C6-C18)aryl unsubstituted or substituted with at least one of deuterium, a (C1-C6)alkyl(s) and a (C6-C18)aryl(s), or are represented by the following formula 1-a, with the proviso that at least one of R 41 to R 48 is represented by the following formula 1-a:
in formula 1-a,
Ra to Rd, each independently, represent hydrogen, deuterium, or a (C6-C18)aryl unsubstituted or substituted with at least one of deuterium, a (C1-C6)alkyl(s) and a (C6-C18)aryl(s); and
Ar a and Ar b , each independently, represent a phenyl unsubstituted or substituted with deuterium, a naphthyl unsubstituted or substituted with deuterium, a biphenyl unsubstituted or substituted with deuterium, a terphenyl unsubstituted or substituted with deuterium, a carbazolyl unsubstituted or substituted with deuterium, a dibenzofuranyl unsubstituted or substituted with deuterium, a dibenzothiophenyl unsubstituted or substituted with deuterium, or a combination thereof, with the proviso that at least one of Ar a and Ar t comprises a substituted or unsubstituted carbazolyl.
12 . The organic electroluminescent compound according to claim 11 , wherein at least one of Ar a and Ar b in formula 1-a is represented by the following formula 1-b1 or 1-b2:
in formulas 1-bi and 1-b2,
La represents a single bond, a phenylene unsubstituted or substituted with deuterium, a naphthylene unsubstituted or substituted with deuterium, a biphenylene unsubstituted or substituted with deuterium, or a terphenylene unsubstituted or substituted with deuterium; and
R 51 to R 59 , each independently, represent hydrogen, deuterium, a phenyl unsubstituted or substituted with deuterium, a naphthyl unsubstituted or substituted with deuterium, a biphenyl unsubstituted or substituted with deuterium, a terphenyl unsubstituted or substituted with deuterium, or a combination thereof.
13 . The organic electroluminescent compound according to claim 11 , wherein the compound represented by formula 1-A is selected from the group consisting of the following compounds:
14 . An organic electroluminescent material comprising the organic electroluminescent compound according to claim 11 .
15 . An organic electroluminescent device comprising the organic electroluminescent compound according to claim 11 .
16 . An organic electroluminescent compound represented by the following formula 1-B:
in formula 1-B,
X a represent O or S;
R 41 to R 48 , each independently, represent hydrogen; deuterium; a (C6-C18)aryl unsubstituted or substituted with at least one of deuterium, a (C1-C6)alkyl(s) and a (C6-C18)aryl(s); or -L b -HAr b , with the proviso that at least one of R 41 to R 48 represents -L b -HAr b ;
L b represents a naphthylene unsubstituted or substituted with deuterium; and
HAr b is represented by the following formula 1-b:
in formula 1-b,
Ar a and Ar b , each independently, represent a phenyl unsubstituted or substituted with deuterium, a naphthyl unsubstituted or substituted with deuterium, a biphenyl unsubstituted or substituted with deuterium, a terphenyl unsubstituted or substituted with deuterium, a carbazolyl unsubstituted or substituted with deuterium, a dibenzofuranyl unsubstituted or substituted with deuterium, a dibenzothiophenyl unsubstituted or substituted with deuterium, or a combination thereof, with the proviso that at least one of Ar a and Ar b comprises a carbazolyl unsubstituted or substituted with at least one of deuterium and a (C6-C18)aryl(s), a dibenzofuranyl unsubstituted or substituted with deuterium, or a dibenzothiophenyl unsubstituted or substituted with deuterium.
17 . The organic electroluminescent compound according to claim 16 , wherein the compound represented by formula 1-B is selected from the group consisting of the following compounds:
18 . An organic electroluminescent material comprising the organic electroluminescent compound according to claim 16 .
19 . An organic electroluminescent device comprising the organic electroluminescent compound according to claim 16 .