Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused‐Ring Electron Acceptors via Halogen Transposition for High‐Performance Organic Solar Cells

Author:

Gu Xiaobin1,Zeng Rui2,Hou Yuqi1,Yu Na3,Qiao Jiawei4,Li Hongxiang5,Wei Yanan1,He Tengfei6,Zhu Jinge2,Deng Jiawei2,Tan Senke2,Zhang Cai'e1,Cai Yunhao1,Long Guankui6,Hao Xiaotao4,Tang Zheng3,Liu Feng2,Zhang Xin1,Huang Hui1ORCID

Affiliation:

1. College of Materials Science and Opto-Electronic Technology, Center of Materials Science and Optoelectronics Engineering, CAS Center for Excellence in Topological Quantum Computation, and CAS Key Laboratory of Vacuum Physics University of Chinese Academy of Sciences Beijing 101408 China

2. 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

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, State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China

5. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610106 China

6. School of Materials Science and Engineering, National Institute for Advanced Materials, Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China

Abstract

AbstractThe structure of molecular aggregates is crucial for charge transport and photovoltaic performance in organic solar cells (OSCs). Herein, the intermolecular interactions and aggregated structures of nonfused‐ring electron acceptors (NFREAs) are precisely regulated through a halogen transposition strategy, resulting in a noteworthy transformation from a 2D‐layered structure to a 3D‐interconnected packing network. Based on the 3D electron transport pathway, the binary and ternary devices deliver outstanding power conversion efficiencies (PCEs) of 17.46 % and 18.24 %, respectively, marking the highest value for NFREA‐based OSCs.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Youth Innovation Promotion Association of the Chinese Academy of Sciences

Publisher

Wiley

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