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

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

doi:10.1002/anie.202318143

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

Angew Chem Int Ed Engl. 2024 Mar 4;63(10):e202318143. doi: 10.1002/anie.202318143. Epub 2024 Jan 22.

Authors

Ziyang Han¹, Cai'e Zhang¹, Tengfei He², Jinhua Gao¹, Yuqi Hou¹, Xiaobin Gu¹, Jikai Lv¹, Na Yu³, Jiawei Qiao⁴, Sixuan Wang¹, Congqi Li¹, Jianqi Zhang⁵, Zhixiang Wei⁵, Qian Peng⁶, Zheng Tang³, Xiaotao Hao⁴, Guankui Long², Yunhao Cai¹, Xin Zhang¹, Hui Huang¹

Affiliations

¹ 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, 100049, China.
² School of Materials Science and Engineering, National Institute for Advanced Materials, Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300350, China.
³ Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
⁴ School of Physics, School of Physics, Shandong University, Jinan, Shandong 250100, China.
⁵ Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing, 100190, China.
⁶ School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.

PMID: 38190621
DOI: 10.1002/anie.202318143

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.

Keywords: Alkyl Side-Chains; Molecular Packing; Nonfused-Ring Electron Acceptors; Solar Cells.

Abstract

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