Abstract:Understanding the structure‐property relationship is one of the critical factors in the practical design of organic small molecules for bulk heterojunction organic solar cells (BHJ‐OSCs). In this study, we designed and synthesized two low‐band‐gap organic small molecule donors, TRh and PhRh. To study the effect of the π‐conjugated spacer, the A‐π‐D‐π‐A architecture was constructed with an efficient dithienopyrrole donor (D) and rhodanine acceptor (A) units. Two types of π‐conjugated spacers, thiophene in TRh a… Show more
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