while the best performing A–D–A type acceptor IT4F needs even more steps since the fluorination of the IC group,which makes the synthesis more complex [28]. Therefore, futurestudy on the chemistry in terms of materials synthesis is requiredto reduce the synthetic complexity, lower the production cost aswell as develop novel synthesis routes for good-performanceNFAs. Additionally, the synthetic complexity of the donor polymer should also be taken into consideration. The synergistic synthetic analysis of the active layers of OSCs instead of eachmaterial is more constructive in terms of developing highperformance OSC devices.