Affiliation:
1. School of Materials Science and Engineering Key Laboratory of Organic Integrated Circuits Ministry of Education Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300350 China
2. State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
Abstract
AbstractPolythiophenes are the most appealing donor materials in organic solar cells (OSCs) due to their simple chemical structures. However, the top‐performance polythiophenes are typically synthesized via Stille polycondensation, which is problematic due to significant toxicity and poor atom economy. By contrast, direct arylation polycondensation (DArP) is an eco‐friendly, and atom‐efficient alternative for synthesizing conjugated polymers, while the best efficiency for DArP‐derived polythiophenes is below 12%. This study reports a series of polythiophene‐based donors synthesized via DArP. Among these, PT4F‐Th reaches a power conversion efficiency (PCE) of 16.4%, which not only matches the current record for polythiophene‐based donor materials, but also marks the highest PCE achieved by DArP‐derived donors to date. The superior performance of PT4F‐Th is largely attributed to its optimal temperature‐dependent aggregation behavior and moderate miscibility with acceptors, along with the highest crystallinity among the candidates, resulting in the most favorable blend film morphology. This study underscores the significant potential of DArP‐derived polythiophenes in developing high‐performance and eco‐friendly OSCs.
Funder
National Natural Science Foundation of China
Science Fund for Distinguished Young Scholars of Tianjin Municipality
Cited by
1 articles.
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