Cz-DPS is consisted of two electron-donating carbazolyl moieties on both end of the molecule and one electron-withdrawing diphenylsulfone center unit. HOMO of 9,9'-(Sulfonylbis(4,1-phenylene))bis(9H-carbazole) is localized on the donor moieties extending to the diphenylsulfone unit, whereas LUMO of that is predominantly localized on the diphenylsulfone unit.
Cz-DPS is normally used as a bipolar host for TADF dopant or it could be used as a blue dopant itself.
p-CzDPS, Bis[4-(9H-carbazole-9-yl)phenyl]sulfone
Bis[4-(9-H-carbazole)phenyl]Sulfone