Liu Hongxing, Geng Yanfang, Xiao Zuo, Ding Liming, Du Jimin, Tang Ailing, Zhou Erjun
Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450003, China.
National Center for Nanoscience and Technology, Beijing, 100190, China.
Adv Mater. 2024 Aug;36(33):e2404660. doi: 10.1002/adma.202404660. Epub 2024 Jun 28.
In the recent advances of organic solar cells (OSCs), quinoxaline (Qx)-based nonfullerene acceptors (QxNFAs) have attracted lots of attention and enabled the recorded power conversion efficiency approaching 20%. As an excellent electron-withdrawing unit, Qx possesses advantages of many modifiable sites, wide absorption range, low reorganization energy, and so on. To develop promising QxNFAs to further enhance the photovoltaic performance of OSCs, it is necessary to systematically summarize the QxNFAs reported so far. In this review, all the focused QxNFAs are classified into five categories as following: SM-Qx, YQx, fused-YQx, giant-YQx, and polymer-Qx according to the molecular skeletons. The molecular design concepts, relationships between the molecular structure and optoelectronic properties, intrinsic mechanisms of device performance are discussed in detail. At the end, the advantages of this kind of materials are summed up, the molecular develop direction is prospected, the challenges faced by QxNFAs are given, and constructive solutions to the existing problems are advised. Overall, this review presents unique viewpoints to conquer the challenge of QxNFAs and thus boost OSCs development further toward commercial applications.
在有机太阳能电池（OSCs）的最新进展中，基于喹喔啉（Qx）的非富勒烯受体（QxNFAs）引起了广泛关注，并使记录的功率转换效率接近20%。作为一种优异的吸电子单元，Qx具有许多可修饰位点、宽吸收范围、低重组能等优点。为了开发有前景的QxNFAs以进一步提高OSCs的光伏性能，有必要系统总结迄今为止报道的QxNFAs。在本综述中，所有重点关注的QxNFAs根据分子骨架分为以下五类：SM-Qx、YQx、稠合-YQx、巨型-YQx和聚合物-Qx。详细讨论了分子设计概念、分子结构与光电性能之间的关系以及器件性能的内在机制。最后，总结了这类材料的优点，展望了分子发展方向，指出了QxNFAs面临的挑战，并针对现有问题提出了建设性的解决方案。总体而言，本综述提出了独特的观点来应对QxNFAs的挑战，从而进一步推动OSCs向商业应用发展。
