Статья

Miscibility screening promotes the efficiency and stability of P3HT‐based organic solar cells

Kaihu XianSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin ChinaRuijie MaDepartment of Electronic and Information Engineering Research Institute for Smart Energy (RISE) Guangdong‐Hong Kong‐Macao (GHM) Joint Laboratory for Photonic‐Thermal‐Electrical Energy Materials and Devices The Hong Kong Polytechnic University Kowloon ChinaKangkang ZhouSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin ChinaJunwei LiuSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin ChinaMengyuan GaoSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin ChinaWenchao ZhaoCo‐Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering Nanjing Forestry University Nanjing ChinaMiaomiao LiSchool of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin ChinaYanhou GengJoint School of National University of Singapore and Tianjin University International Campus of Tianjin University Fuzhou ChinaLong YeHubei Longzhong Laboratory Xiangyang China

2023en

ABI

Аннотация

Abstract The power conversion efficiency of organic photovoltaics (OPVs) has witnessed continuous breakthroughs in the past few years, mostly benefiting from the extensive use of a facile ternary blending strategy by blending the host polymer donor:small molecule acceptor mixture with a second small molecule acceptor. Nevertheless, this rather general strategy used in the well‐known PM6 systems fails in constructing high‐performance P3HT‐based ternary OPVs. As a result, the efficiencies of all resulting ternary blends based on a benchmark host P3HT:ZY‐4Cl and a second acceptor are no more than 8%. Employing the mutual miscibility of the binary blends as a guide to screen the second acceptor, here we were able to break the longstanding 10%‐efficiency barrier of ternary OPVs based on P3HT and dual nonfullerene acceptors. With this rational approach, we identified a multifunctional small molecule acceptor BTP‐2Br to simultaneously improve the photovoltaic performance in both P3HT and PM6‐based ternary OPVs. Attractively, the P3HT:ZY‐4Cl:BTP‐2Br ternary blend exhibited a record‐breaking efficiency of 11.41% for P3HT‐based OPVs. This is the first‐ever report that over 11% efficiency is achieved for P3HT‐based ternary OPVs. Importantly, the study helps the community to rely less on trial‐and‐error methods for constructing ternary solar cells.

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Идентификаторы

DOI: 10.1002/agt2.466

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