Porphyrin small molecules have been widely used in organic solar cells in recent years. However, further improvement of device efficiency is restricted owing to the absorption defects between Soret and Q bands of porphyrin donors and the limitation of application. The aim of this study was to compensate for its inherent defects and explore the photoelectric properties combined with the non-fused non-fullerene acceptor (NFA) to increase its universality. To achieve this goal, seven mono-porphyrin donor molecules with A-π-D-π-A configuration (SM1-SM7) were designed by modifying the π-bridges. The results indicate that π-bridge and side chains can lead to different ways of intramolecular charge transfer, which obtaining a new absorption peak between Soret and Q bands while the absorption range was extended to a near-infrared region (up to 1200 nm). When combined with the NFA, the larger ratios of intermolecular charge transfer and recombination rates (k_inter-CT/k_inter-CR) exceed 10¹¹, which is conducive to obtaining higher short circuit current (J_SC). At the same time, the open-circuit voltages (V_OC) of devices were close to and/or higher than 1.0 V, indicating that the imbalance between J_SC and V_OC will be broken. Finally, we hope that this work can provide a strategy for designing potential panchromatic absorption donor molecules.

近年来，卟啉小分子已广泛用于有机太阳能电池中。然而，由于卟啉供体的Soret和Q带之间的吸收缺陷和应用的限制，限制了器件效率的进一步提高。这项研究的目的是弥补其固有的缺陷，并探索与非熔融非富勒烯受体（NFA）相结合的光电性能，以提高其通用性。为了实现这一目标，通过修饰π桥设计了七个具有A-π-D-π-A构型的单卟啉供体分子（SM1-SM7）。结果表明，π-桥和侧链可导致分子内电荷转移的不同方式，从而在Soret和Q谱带之间获得新的吸收峰，而吸收范围扩展至近红外区域（最大1200 nm）。k _inter-CT / k _inter-CR）超过10 ¹¹，有利于获得更高的短路电流（J _SC）。同时，器件的开路电压（V _OC）接近和/或高于1.0 V，这表明J _SC和V _OC之间的不平衡将被破坏。最后，我们希望这项工作可以为设计潜在的全色吸收供体分子提供一种策略。