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4. Precisely Manipulating Molecular Packing via Tuning Alkyl Side‐Chain Topology Enabling High‐Performance Nonfused‐Ring Electron Acceptors.

Author

Han, Ziyang, Zhang, Cai'e, He, Tengfei, Gao, Jinhua, Hou, Yuqi, Gu, Xiaobin, Lv, Jikai, Yu, Na, Qiao, Jiawei, Wang, Sixuan, Li, Congqi, Zhang, Jianqi, Wei, Zhixiang, Peng, Qian, Tang, Zheng, Hao, Xiaotao, Long, Guankui, Cai, Yunhao, Zhang, Xin, and Huang, Hui

Subjects
*ELECTROPHILES, *SOLAR cells, *ORGANIC semiconductors, *ELECTRON mobility, *TOPOLOGY
Abstract

In the development of high‐performance organic solar cells (OSCs), the self‐organization of organic semiconductors plays a crucial role. This study focuses on the precisely manipulation of molecular assemble via tuning alkyl side‐chain topology in a series of low‐cost nonfused‐ring electron acceptors (NFREAs). Among the three NFREAs investigated, DPA‐4, which possesses an asymmetric alkyl side‐chain length, exhibits a tight packing in the crystal and high crystallinity in the film, contributing to improved electron mobility and favorable film morphology for DPA‐4. As a result, the OSC device based on DPA‐4 achieves an excellent power conversion efficiency of 16.67 %, ranking among the highest efficiencies for NFREA‐based OSCs. [ABSTRACT FROM AUTHOR]

Published
2024
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