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Single‐Junction Organic Photovoltaic Cell with 19% Efficiency

Yong CuiState 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 ChinaYe XuSchool of Chemistry and Chemical Engineering University of Chinses Academy of Sciences Beijing 100049 ChinaHuifeng YaoState 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 ChinaPengqing BiState 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 ChinaLing HongSchool of Chemistry and Chemical Engineering University of Chinses Academy of Sciences Beijing 100049 ChinaJianqi ZhangCAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 ChinaYunfei ZuSchool of Chemistry and Chemical Engineering University of Chinses Academy of Sciences Beijing 100049 ChinaTao ZhangState 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 ChinaJinzhao QinSchool of Chemistry and Chemical Engineering University of Chinses Academy of Sciences Beijing 100049 ChinaJunzhen RenState 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 ChinaZhihao ChenSchool of Physics State Key Laboratory of Crystal Materials Shandong University Jinan Shandong 250100 P. R. ChinaChang HeState 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 ChinaXiaotao HaoSchool of Physics State Key Laboratory of Crystal Materials Shandong University Jinan Shandong 250100 P. R. ChinaZhixiang WeiCAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 ChinaJianhui HouSchool of Chemistry and Chemical Engineering University of Chinses Academy of Sciences Beijing 100049 China

2021en

ABI

Annotatsiya

Abstract Improving power conversion efficiency (PCE) is important for broadening the applications of organic photovoltaic (OPV) cells. Here, a maximum PCE of 19.0% (certified value of 18.7%) is achieved in single‐junction OPV cells by combining material design with a ternary blending strategy. An active layer comprising a new wide‐bandgap polymer donor named PBQx‐TF and a new low‐bandgap non‐fullerene acceptor (NFA) named eC9‐2Cl is rationally designed. With optimized light utilization, the resulting binary cell exhibits a good PCE of 17.7%. An NFA F‐BTA3 is then added to the active layer as a third component to simultaneously improve the photovoltaic parameters. The improved light unitization, cascaded energy level alignment, and enhanced intermolecular packing result in open‐circuit voltage of 0.879 V, short‐circuit current density of 26.7 mA cm −2 , and fill factor of 0.809. This study demonstrates that further improvement of PCEs of high‐performance OPV cells requires fine tuning of the electronic structures and morphologies of the active layers.

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Identifikatorlar

DOI: 10.1002/adma.202102420

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