Miscibility screening promotes the efficiency and stability of P3HT‐based organic solar cells
Kaihu Xian,
Ruijie Ma,
Kangkang Zhou,
Junwei Liu,
Mengyuan Gao,
Wenchao Zhao,
Miaomiao Li,
Yanhou Geng,
Long Ye
Affiliations
Kaihu Xian
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Ruijie Ma
Department 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 China
Kangkang Zhou
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Junwei Liu
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Mengyuan Gao
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Wenchao Zhao
Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering Nanjing Forestry University Nanjing China
Miaomiao Li
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Yanhou Geng
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
Long Ye
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China
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.
