Ding Yafei, He Feng
Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China.
Macromol Rapid Commun. 2025 Jan;46(2):e2400637. doi: 10.1002/marc.202400637. Epub 2024 Sep 28.
Stretchable organic solar cells (SOSCs) have advanced rapidly in the last few years as power sources required to realize portable and wearable electronics become available. Through rational material and device engineering, SOSCs are now able to retain their photovoltaic performance even when subjected to repeated mechanical deformations. However, reconciling a high efficiency and an excellent stretchability is still a huge challenge, and the development of SOSCs has lagged far behind that of flexible OSCs. In this perspective article, recent strategies for imparting mechanical robustness to SOSCs while maintaining high power conversion efficiency are reviewed, with emphasis on the molecular design of active layers. Initially, an overview of molecular design approaches and recent research advances is provided in improving the stretchability of active layers, including donors, acceptors, and single-component materials. Subsequently, another common strategy for regulating photovoltaic and mechanical properties of SOSCs, namely multi-component system, is summarized and analyzed. Lastly, considering that SOSCs research is in its infancy, the current challenges and future directions are pointed out.
在过去几年中，随着实现便携式和可穿戴电子产品所需的电源问世，可拉伸有机太阳能电池（SOSCs）取得了迅速进展。通过合理的材料和器件工程，SOSCs现在即使在经受反复机械变形时也能够保持其光伏性能。然而，兼顾高效率和出色的可拉伸性仍然是一个巨大挑战，并且SOSCs的发展远远落后于柔性有机太阳能电池（OSCs）。在这篇观点文章中，回顾了在保持高功率转换效率的同时赋予SOSCs机械稳健性的近期策略，重点是活性层的分子设计。首先，概述了在提高活性层（包括供体、受体和单组分材料）的可拉伸性方面的分子设计方法和近期研究进展。随后，总结并分析了调节SOSCs光伏和机械性能的另一种常见策略，即多组分体系。最后，鉴于SOSCs研究尚处于起步阶段，指出了当前的挑战和未来的方向。
