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 a specific combination of host compounds and/or an organic electroluminescent compound according to the present disclosure as an organic electroluminescent material, an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or long lifespan characteristics can be provided.
1 . A plurality of host materials comprising at least one first host material represented by the following Formula 1 and at least one second host material represented by the following Formula 2:
wherein,
X represents O, S, Se, CR 13 R 14 , or NR 15 ;
R 11 and R 12 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C6-C30) aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, or —SiR 16 R 17 R 18 ;
R 13 to R 18 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30) alkyl, a substituted or unsubstituted (C6-C30) aryl, or a substituted or unsubstituted (3- to 30-membered) heteroaryl;
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 (3- to 30-membered) heteroaryl containing at least one nitrogen atom(s);
a represents an integer of 1 to 4, and b represents an integer of 1 to 3;
when a is 2 or more, each of R 11 is the same or different, and when b is 2 or more, each of R 12 is the same or different;
wherein,
R 1 to R 10 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30) alkyl, a substituted or unsubstituted (C6-C30) aryl, or the following Formula a; provided that, at least one of R 1 to R 10 is (are) the following Formula a;
wherein,
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 (C1-C30) alkyl, a substituted or unsubstituted (C6-C30) aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, or -L 3 -NAr 3 Ar 4 ;
L 3 represents a substituted or unsubstituted (C6-C30) arylene or a substituted or unsubstituted (3- to 30-membered) heteroarylene; and
Ar 3 and Ar 4 each independently represent a substituted or unsubstituted (C6-C30) aryl or a substituted or unsubstituted (3- to 30-membered) heteroaryl.
2 . The plurality of host materials according to claim 1 , wherein HAr of Formula 1 represents 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-A:
wherein,
X represents as defined in claim 1 ;
R 19 to R 26 each independently represent hydrogen, deuterium, (C6-C18) aryl unsubstituted or substituted with at least one of deuterium, (C1-C6) alkyl, and (C6-C18) aryl, a substituted or unsubstituted (3- to 30-membered) heteroaryl, or the following Formula 1-a; provided that at least one of R 19 to R 26 is (are) the following Formula 1-a;
wherein,
L 4 represents a single bond or a substituted or unsubstituted (C6-C30) arylene;
X 1 to X 3 each independently represent CR or N; provided that, at least two of X 1 to X 3 are N; and
Ar a and Ar b 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 1 , wherein the Formula 2 is represented by the following Formula 2-1 or 2-2:
wherein,
R 1 to R 10 , L 1 , Ar 1 and Ar 2 are as defined in claim 1 .
5 . The plurality of host materials according to claim 1 , wherein Ar 1 and Ar 2 in Formula 2 each independently represent a substituted or unsubstituted phenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted o-terphenyl, a substituted or unsubstituted o-quarterphenyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted phenanthrenyl, benzofluorenyl unsubstituted or substituted with methyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted dibenzoselenophenyl, a substituted or unsubstituted benzocarbazolyl, a substituted or unsubstituted benzonaphthofuranyl, or a substituted or unsubstituted benzonaphthothiophenyl.
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 a plurality of host materials according to claim 1 .
9 . An organic electroluminescent compound represented by the following Formula 3:
wherein,
R 27 to R 36 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30) alkyl, a substituted or unsubstituted (C6-C30) aryl, or the following Formula b; provided that at least one of R 27 to R 36 is (are) the following Formula b;
wherein,
Y represents O, S, CR 37 R 38 or NR 39 ;
R 37 to R 39 each independently represent hydrogen, deuterium, or a substituted or unsubstituted (C6-C30) aryl;
L 3 represents a single bond, a substituted or unsubstituted (C6-C30) arylene, or a substituted or unsubstituted (3- to 30-membered) heteroarylene; and
Ar 3 represents a substituted or unsubstituted (C6-C30) aryl, or a substituted or unsubstituted (3- to 30-membered) heteroaryl.
10 . An organic electroluminescent device comprising the organic electroluminescent compound according to claim 9 .