A PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
The present disclosure relates to a plurality of host materials and organic electroluminescent devices comprising the same. The present disclosure may provide a plurality of host materials having a composition favorable to thermal denaturation due to a low deposition temperature, while improving hole properties and electronic properties of HOMO and LUMO, by comprising separate compounds represented by formulas 1 and 2 into a light-emitting layer. By comprising the plurality of host materials of the present disclosure, it is possible to provide an organic electroluminescent device having a lower driving voltage, higher luminous efficiency and/or longer lifetime.
1 . An organic electroluminescent compound represented by the following formula 11:
wherein
Ar 11 to Ar 20 , each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, or a substituted or unsubstituted (C3-C30)cycloalkyl; with the proviso that at least one of Ar 11 to Ar 20 is represented by the following formula 11-1:
wherein
HAr 11 represents
T, each independently, represents N or CR 31 ;
L 11 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (5- to 30-membered)heteroarylene;
R 10 , R 11 and R 31 , each independently, represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 25-membered)heteroaryl, —NR 5 R 6 , or —SiR 7 R 8 R 9 ; or R 10 and R 11 , or the adjacent R 31 's may be linked to each other to form a ring; and
R 5 to R 9 , 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.
2 . The organic electroluminescent compound according to claim 1 , wherein HAr 11 is represented by at least one of the following formulas 12-1 to 12-7:
wherein
A ring represents a naphthalene ring;
R 31 , each independently, is as defined in claim 8 ; and
c′ represents an integer of 1 to 5, d′ represents an integer of 1 to 4, e′ represents an integer of 1 to 7, where if c′ to e′, each independently, are an integer of 2 or more, each R 31 may be the same or different.
3 . The organic electroluminescent compound according to claim 1 , wherein the compound represented by formula 11 is selected from the group consisting of the following compounds: