1. A polymer acceptor with double-decker configuration enhances molecular packing for high-performance all-polymer solar cells
- Author
-
Yu, Han, Wang, Yan, Kwok, Chung Hang, Zhou, Rongkun, Yao, Zefan, Mukherjee, Subhrangsu, Sergeev, Aleksandr, Hu, Haixia, Fu, Yuang, Ng, Ho Ming, Chen, Li, Zhang, Di, Zhao, Dahui, Zheng, Zilong, Lu, Xinhui, Yin, Hang, Wong, Kam Sing, Ade, Harald, Zhang, Chen, Zhu, Zonglong, and Yan, He
- Abstract
All-polymer solar cells (all-PSCs) have seen rapid progress enabled by the development of high-performance polymer acceptors. Most polymer acceptors are based on the monomers of a classic small molecular acceptor (SMA) named Y6 by polymerizing at the position of the end groups, forming an “end-to-end” linkage. In this work, we report a completely different “core-to-core” linking mode by polymerizing the Y-series monomers at the central core position instead. This innovative strategy results in a drastically altered molecular configuration that resembles a “double decker,” with intramolecular packing between different monomer units in the same polymer. The overall molecular packing is improved, benefiting charge delocalization and charge transport. As a result, the PffBQx-T-based ternary blend achieved an outstanding efficiency of 18.7%, attributed to the enhanced absorption response, improved packing, and efficient charge dynamics. Our work demonstrates a novel polymer design rationale that serves as a promising avenue toward highly efficient and stable all-PSCs.
- Published
- 2024
- Full Text
- View/download PDF