Molecular Design of Dimeric Acceptor Enables Binary Organic Solar Cells with 19.78% Efficiency and Enhanced Stability
Source abstract
Abstract
Abstract The development of organic solar cells (OSCs) with high efficiency and stability is highly desirable to facilitate its commercial applications. Although dimeric acceptors with distinctive advantages have been widely studied, high‐performance binary OSCs based on such molecules have rarely been achieved. In this work, a new dimeric acceptor (DY‐FL) is constructed by simultaneously optimizing the linking sites and units, as well as the building blocks. Thanks to the effective molecular design, DY‐FL provides improved molecular stacking for fibrous morphology with favorable exciton/charge dynamics. Consequently, DY‐FL‐based binary OSCs render a superior power conversion efficiency (PCE) of 19.78%, representing a record‐breaking efficiency for binary OSCs based on dimeric acceptors. Importantly, DY‐FL‐based devices display significantly enhanced operational stability under external stimuli such as light and heat, in comparison to their small molecule acceptor (Y‐F)‐based counterpart. These findings highlight the significance of building blocks and linking modes, providing insight into the effective molecular design strategy of dimeric acceptors for state‐of‐the‐art OSCs.
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Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen Guangdong 518055 China
The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry College of Chemistry and Renewable Energy Conversion and Storage Center Nankai University Tianjin 300071 China
State Key Laboratory of Luminescent Materials and Devices School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China
Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
Institute of Innovative Materials Southern University of Science and Technology Shenzhen 518055 China
Funding
National Natural Science Foundation of China · Guangdong Provincial Key Laboratory Of Catalysis
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