Xie Meiling, Wei Zhixiang, Lu Kun
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology Beijing 100190 China.
University of Chinese Academy of Sciences Beijing 100049 China
Chem Sci. 2024 May 7;15(22):8265-8279. doi: 10.1039/d4sc01481b. eCollection 2024 Jun 5.
Minimizing energy loss plays a critical role in the quest for high-performance organic solar cells (OSCs). However, the origin of large energy loss in OCSs is complicated, involving the strong exciton binding energy of organic semiconductors, nonradiative charge-transfer state decay, defective molecular stacking network, and so on. The recently developed quinoxaline (Qx)-based acceptors have attracted extensive interest due to their low reorganization energy, high structural modification possibilities, and distinctive molecular packing modes, which contribute to reduced energy loss and superior charge generation/transport, thus improving the photovoltaic performance of OSCs. This perspective summarizes the design strategies of Qx-based acceptors (including small-molecule, giant dimeric and polymeric acceptors) and the resulting optoelectronic properties and device performance. In addition, the ternary strategy of introducing Qx-based acceptors as the third component to reduce energy loss is briefly discussed. Finally, some perspectives for the further exploration of Qx-based acceptors toward efficient, stable, and industry-compatible OSCs are proposed.
在追求高性能有机太阳能电池（OSC）的过程中，将能量损失降至最低起着关键作用。然而，OCS中大量能量损失的起源很复杂，涉及有机半导体的强激子结合能、非辐射电荷转移态衰减、有缺陷的分子堆积网络等。最近开发的基于喹喔啉（Qx）的受体因其低重组能、高结构修饰可能性和独特的分子堆积模式而引起了广泛关注，这些有助于减少能量损失并实现优异的电荷产生/传输，从而提高OSC的光伏性能。本综述总结了基于Qx的受体（包括小分子、巨型二聚体和聚合物受体）的设计策略以及由此产生的光电性质和器件性能。此外，还简要讨论了引入基于Qx的受体作为第三组分以减少能量损失的三元策略。最后，针对进一步探索基于Qx的受体以实现高效、稳定且与工业兼容的OSC提出了一些观点。
