Improving photovoltaic properties of the linear A-Ar-A type small molecules with rhodanine by extending arylene core

Three novel small molecules of (DRCN3T)2Ar with different central units of arylene (Ar) and the same terminal of dicyanomethylene-rhodanine were obtained, respectively. A significantly increasing PCE of 5.15% in the (DRCN3T)2Ar based OSCs was obtained, while phenylene (Ph) or naphthylene (Nap) was replaced by anthrylene (Ant) in the Ar units.223