Efficient strategies to improve photovoltaic performance of A-D-A type small molecules by introducing rigidly fluorinated central cores

Two novel A-D-A type small molecules of DFPh(DPP)2 and DFDT(DPP)2 were designed and synthesized. The significant effect of the fluorinated central core is observed on the optical, electrochemical, morphological and photovoltaic properties of SMs. The photovoltaic devices based on SMs have been effectively improved due to the elevation of Js, Voc and FF synchronously.306