| 主权项 |
1. A composition, comprising:
a first host compound including moieties represented by the following Chemical Formulae 1 to 3 that are sequentially bonded with each other, and a second host compound including at least one carbazole group with a substituent having hole characteristics, wherein, in the Chemical Formulae 1 to 3, X1 is *—Y1-ET, X2 is *—Y2—Ar1, ET is a substituent for accepting an electron when an electric field is applied, Ar1 is a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, or a combination thereof, Y1 and Y2 are each independently a single bond, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C2 to C20 alkenylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C2 to C30 heteroarylene group, or a combination thereof, L is a substituted or unsubstituted C2 or C3 alkenylene group or a substituted or unsubstituted C6 to C20 arylene group, and R1 to R4 are each independently hydrogen, deuterium, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, or a combination thereof. |
