Balancing Flexible Side Chains on 2D Conjugated Acceptors Enables High‐Performance Organic Solar Cell
Source abstract
Abstract
Abstract Balancing the rigid backbones and flexible side chains of light‐harvesting materials is crucially important to reach optimized intermolecular packing, micromorphology, and thus photovoltaic performance of organic solar cells (OSCs). Herein, based on a distinctive CH‐series acceptor platform with 2D conjugation extended backbones, a series of nonfullerene acceptors ( CH‐6F‐Cn ) are synthesized by delicately tuning the lengths of flexible side chains from n ‐octyl to n ‐amyl. A systemic investigation has revealed that the variation of the side chain's length can not only modulate intermolecular packing modes and crystallinity but also dramatically improve the micromorphology of the active layer and eventual photovoltaic parameters of OSCs. Consequently, the highest PCE of 18.73% can be achieved by OSCs employing D18 : PM6 : CH‐6F‐C8 as light‐harvesting materials.
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Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Elemento‐Organic Chemistry The Centre of Nanoscale Science and Technology Institute of Polymer Chemistry Tianjin Key Laboratory of functional polymer materials College of Chemistry Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
State Key Laboratory of Separation Membranes and Membrane Processes School of Chemistry Tiangong University Tianjin 300387 China
The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural Resources (Tianjin) Tianjin 300192 China
State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
Funding
Ministry of Science and Technology of the People's Republic of China · National Key Research and Development Program of China · National Natural Science Foundation of China · China Postdoctoral Science Foundation
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