Although the power conversion efficiency (PCE) of organic photovoltaic (OPV) devices has recently improved to more than 16%, halogenated solution processes are typically employed to obtain optimal performance. However, halogenated processing is harmful to health and the environment, which can be a significant obstacle to commercialization. Therefore, development of active materials processable under halogen-free conditions is of great importance in this field. In this study, a 16.04% OPV device, processed under halogen-free conditions, is developed by employing a new active-blend system, PBDTTPD-HT:BTP-2F-BO. It is highly soluble in halogen-free solvents, forming a preferential bulk-heterojunction morphology. The PBDTTPD-HT:BTP-2F-BO device achieves a PCE comparable with current state-of-the-art devices based on PBDB-TF:BTP-4F (also known as PM6:Y6) using a conventional halogenated process (16.40% versus 16.33%). Furthermore, it demonstrates a significantly higher PCE than the PBDB-TF:BTP-4F device with a halogen-free process (16.04% versus 9.70%).

尽管有机光伏 (OPV) 设备的功率转换效率 (PCE) 最近已提高到 16% 以上，但通常采用卤化溶液工艺来获得最佳性能。然而，卤化加工对健康和环境有害，这可能是商业化的重大障碍。因此，开发可在无卤条件下加工的活性材料在该领域具有重要意义。在这项研究中，通过采用新的有源混合系统 PBDTTPD-HT:BTP-2F-BO 开发了一种在无卤素条件下加工的 16.04% OPV 设备。它在无卤素溶剂中高度溶解，形成优先的本体异质结形态。PBDTTPD-HT:BTP-2F-BO 设备实现的 PCE 可与基于 PBDB-TF:BTP-4F（也称为 PM6：Y6) 使用传统卤化工艺（16.40% 对 16.33%）。此外，与采用无卤素工艺的 PBDB-TF:BTP-4F 器件相比，它显示出明显更高的 PCE（16.04% 对 9.70%）。