A new low band gap small molecule DPP–DTF with a D–π–A–π–D molecular structure composed of a dithiafulvalene (DTF) donor and a diketopyrrolopyrrole (DPP) acceptor was synthesized and tested for organic solar cells.
We successfully developed a ternary system by introducing a low band gap material of DPPEZnP-O into a PTB7 : PC71BM blend to improve the photovoltaic properties of BHJ solar cells.