Gu Xiaobin, Zeng Rui, He Tengfei, Zhou Guanqing, Li Congqi, Yu Na, Han Fei, Hou Yuqi, Lv Jikai, Zhang Ming, Zhang Jianqi, Wei Zhixiang, Tang Zheng, Zhu Haiming, Cai Yunhao, Long Guankui, Liu Feng, Zhang Xin, Huang Hui
College of Materials Science and Opto-Electronic Technology, Center of Materials Science and Optoelectronics Engineering, CAS Center for Excellence in Topological Quantum Computation, CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, 101408, China.
School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, In-situ Center for Physical Science, and Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China.
Adv Mater. 2024 Jun;36(23):e2401370. doi: 10.1002/adma.202401370. Epub 2024 Feb 29.
Achieving desirable charge-transport highway is of vital importance for high-performance organic solar cells (OSCs). Here, it is shown how molecular packing arrangements can be regulated via tuning the alkyl-chain topology, thus resulting in a 3D network stacking and highly interconnected pathway for electron transport in a simple-structured nonfused-ring electron acceptor (NFREA) with branched alkyl side-chains. As a result, a record-breaking power conversion efficiency of 17.38% (certificated 16.59%) is achieved for NFREA-based devices, thus providing an opportunity for constructing low-cost and high-efficiency OSCs.
实现理想的电荷传输通道对于高性能有机太阳能电池（OSC）至关重要。在此，展示了如何通过调整烷基链拓扑结构来调控分子堆积排列，从而在具有支链烷基侧链的简单结构非稠环电子受体（NFREA）中形成三维网络堆积和高度互连的电子传输通道。结果，基于NFREA的器件实现了创纪录的17.38%（认证值为16.59%）的功率转换效率，从而为构建低成本、高效率的有机太阳能电池提供了契机。
