Статья

High‐Efficiency and Mechanically Robust All‐Polymer Organic Photovoltaic Cells Enabled by Optimized Fibril Network Morphology

Lijiao MaBeijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaYong CuiBeijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaJianqi ZhangCAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 ChinaKaihu XianSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300350 P. R. ChinaZhihao ChenSchool of Physics State Key Laboratory of Crystal Materials Shandong University Shandong 250100 P. R. ChinaKangkang ZhouSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300350 P. R. ChinaTao ZhangBeijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaWenxuan WangBeijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaHuifeng YaoBeijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaShaoqing ZhangSchool of Chemistry and Biology Engineering University of Science and Technology Beijing Beijing 100083 P. R. ChinaXiaotao HaoSchool of Physics State Key Laboratory of Crystal Materials Shandong University Shandong 250100 P. R. ChinaLong YeSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300350 P. R. ChinaJianhui HouBeijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

2022en

ABI

Аннотация

Abstract All‐polymer organic photovoltaic (OPV) cells possessing high photovoltaic performance and mechanical robustness are promising candidates for flexible wearable devices. However, developing photoactive materials with good mechanical properties and photovoltaic performance so far remains challenging. In this work, a polymer donor PBDB‐TF with a high weight‐average molecular weight ( M w ) is introduced to enable highly efficient all‐polymer OPV cells featuring excellent mechanical reliability. By incorporating the high‐ M w PBDB‐TF as a third component into the PBQx‐TF:PY‐IT blend, the bulk heterojunction morphology is finely tuned with a more compact π–π stacking distance, affording efficient pathways for charge transport as well as mechanical stress dissipation. Hence, all‐polymer OPV cells based on the ternary blend film demonstrate a maximum power conversion efficiency (PCE) of 18.2% with an outstanding fill factor of 0.796. The flexible OPV cell delivers a decent PCE of 16.5% with high mechanical stability. These results present a promising strategy to address the mechanical properties and boost the photovoltaic performance of all‐polymer OPV cells.

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Идентификаторы

DOI: 10.1002/adma.202208926

Цитирования и источники

Цитирований: 2Использованных источников: 0

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