@article{0dcf2e1797ad4c8798d7aa18b4bbca87,
title = "A Synergistic Strategy of Manipulating the Number of Selenophene Units and Dissymmetric Central Core of Small Molecular Acceptors Enables Polymer Solar Cells with 17.5 % Efficiency",
abstract = "A dissymmetric backbone and selenophene substitution on the central core was used for the synthesis of symmetric or dissymmetric A-DA′D-A type non-fullerene small molecular acceptors (NF-SMAs) with different numbers of selenophene. From S-YSS-Cl to A-WSSe-Cl and to S-WSeSe-Cl, a gradually red-shifted absorption and a gradually larger electron mobility and crystallinity in neat thin film was observed. A-WSSe-Cl and S-WSeSe-Cl exhibit stronger and tighter intermolecular π–π stacking interactions, extra S⋅⋅⋅N non-covalent intermolecular interactions from central benzothiadiazole, better ordered 3D interpenetrating charge-transfer networks in comparison with thiophene-based S-YSS-Cl. The dissymmetric A-WSSe-Cl-based device has a PCE of 17.51 %, which is the highest value for selenophene-based NF-SMAs in binary polymer solar cells. The combination of dissymmetric core and precise replacement of selenophene on the central core is effective to improve Jsc and FF without sacrificing Voc.",
keywords = "central core engineering, dissymmetric strategy, polymer solar cells, selenophene substitution, small molecular acceptors",
author = "Can Yang and Qiaoshi An and Bai, {Hai Rui} and Zhi, {Hong Fu} and Ryu, {Hwa Sook} and Asif Mahmood and Xin Zhao and Shaowen Zhang and Woo, {Han Young} and Wang, {Jin Liang}",
note = "Funding Information: This work was financially supported by the grants from the National Natural Science Foundation of China (No. 21971014, 21672023, 21472012) and the National Key Research and Development Program of China (2018YFA0901800). J.-L.W. was supported by the Thousand Youth Talents Plan of China and the BIT Teli Young Fellow Recruitment Program. The authors are grateful to Hwa Sook Ryu and Prof. Han Young Woo (Korea University) for 2D GIWAXS experiments and analysis. The authors thank Analysis & Testing Center, Beijing Institute of Technology for NMR, AFM, TGA, devices preparation, and characterization. Can Yang thanks Dr. Kai-Kai Liu (Beijing Institute of Technology) for help on the synthesis of precursors. C.Y. thanks Dr. Hai-Rui Bai and Xin Zhao (Beijing Institute of Technology) for help on the synthesis of compound 7. C.Y. thanks Hong-Fu Zhi (Beijing Institute of Technology) for help on drawing the single-crystal figures and the synthesis of IC-2Cl and S-YSS-Cl. C.Y. thanks Prof. Qiaoshi An (Beijing Institute of Technology) for devices preparation, characterization, and analysis. C.Y. thanks Lu Yan, Hai-Rui Bai, Hong-Fu Zhi, and Mengyun Jiang (Beijing Institute of Technology) for the help on devices characterization. C.Y. thanks Prof. Jin-Liang Wang (Beijing Institute of Technology) for single-crystal preparation. The authors thank Prof. Hai-Jun Fan, Prof. Xiaozhang Zhu, and Dr. Yongjie Chen (Chinese Academy of Sciences) for help on single-crystal measurements. The authors thank Prof. Xiaoyu Cao and Dr. Hang Qu (Xiamen University) for help on crystallographic refinement and analysis. The authors thank Prof. Jian Pei and Dr. Shi-Sheng Wan (Peking University) for MS experiments. The authors thank Prof. Xiong Li (Beijing Technology and Business University) for TPV and TPC experiments. The authors thank Prof. Yanming Sun and Feng He for fruitful discussion. The authors thank Prof. Qiang Peng and Xiaopeng Xu for the help on initial device tests. The authors thank Prof. Teng Long and Prof. Bo Wang for the supporting on the construction of organic film photoelectric device testing room. Funding Information: This work was financially supported by the grants from the National Natural Science Foundation of China (No. 21971014, 21672023, 21472012) and the National Key Research and Development Program of China (2018YFA0901800). J.‐L.W. was supported by the Thousand Youth Talents Plan of China and the BIT Teli Young Fellow Recruitment Program. The authors are grateful to Hwa Sook Ryu and Prof. Han Young Woo (Korea University) for 2D GIWAXS experiments and analysis. The authors thank Analysis & Testing Center, Beijing Institute of Technology for NMR, AFM, TGA, devices preparation, and characterization. Can Yang thanks Dr. Kai‐Kai Liu (Beijing Institute of Technology) for help on the synthesis of precursors. C.Y. thanks Dr. Hai‐Rui Bai and Xin Zhao (Beijing Institute of Technology) for help on the synthesis of compound 7. C.Y. thanks Hong‐Fu Zhi (Beijing Institute of Technology) for help on drawing the single‐crystal figures and the synthesis of IC‐2Cl and S‐YSS‐Cl. C.Y. thanks Prof. Qiaoshi An (Beijing Institute of Technology) for devices preparation, characterization, and analysis. C.Y. thanks Lu Yan, Hai‐Rui Bai, Hong‐Fu Zhi, and Mengyun Jiang (Beijing Institute of Technology) for the help on devices characterization. C.Y. thanks Prof. Jin‐Liang Wang (Beijing Institute of Technology) for single‐crystal preparation. The authors thank Prof. Hai‐Jun Fan, Prof. Xiaozhang Zhu, and Dr. Yongjie Chen (Chinese Academy of Sciences) for help on single‐crystal measurements. The authors thank Prof. Xiaoyu Cao and Dr. Hang Qu (Xiamen University) for help on crystallographic refinement and analysis. The authors thank Prof. Jian Pei and Dr. Shi‐Sheng Wan (Peking University) for MS experiments. The authors thank Prof. Xiong Li (Beijing Technology and Business University) for TPV and TPC experiments. The authors thank Prof. Yanming Sun and Feng He for fruitful discussion. The authors thank Prof. Qiang Peng and Xiaopeng Xu for the help on initial device tests. The authors thank Prof. Teng Long and Prof. Bo Wang for the supporting on the construction of organic film photoelectric device testing room. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",
year = "2021",
month = aug,
day = "23",
doi = "10.1002/anie.202104766",
language = "English",
volume = "60",
pages = "19241--19252",
journal = "Angewandte Chemie - International Edition",
issn = "1433-7851",
publisher = "John Wiley and Sons Ltd",
number = "35",
}