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A Non-Conjugated Polymer Acceptor for Efficient and Thermally Stable All-Polymer Solar Cells |
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| Authors: | Dr. Qunping Fan Dr. Wenyan Su Dr. Shanshan Chen Dr. Tao Liu Dr. Wenliu Zhuang Dr. Ruijie Ma Xin Wen Dr. Zhihong Yin Dr. Zhenghui Luo Prof. Xia Guo Prof. Lintao Hou Prof. Kasper Moth-Poulsen Prof. Yu Li Prof. Zhiguo Zhang Prof. Changduk Yang Dr. Donghong Yu Prof. He Yan Prof. Maojie Zhang Prof. Ergang Wang |
| Affiliation: | 1. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Göteborg, Sweden;2. Department of Energy Engineering, School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919 South Korea MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems, CQU-NUS Renewable Energy Materials & Devices Joint Laboratory, School of Energy & Power Engineering, Chongqing University, Chongqing, 400044 China;3. Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong, Hong Kong;4. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Göteborg, Sweden Guangdong Research Center for Special Building Materials and Its Green Preparation Technology, Advanced Research Center for Polymer Processing Engineering of Guangdong Province, Guangdong Industry Polytechnic, Guangzhou, 510300 P. R. China;5. Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 China;6. Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou, 510632 China;7. Guangdong Research Center for Special Building Materials and Its Green Preparation Technology, Advanced Research Center for Polymer Processing Engineering of Guangdong Province, Guangdong Industry Polytechnic, Guangzhou, 510300 P. R. China;8. State Key Laboratory of Organic/Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China;9. Department of Energy Engineering, School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919 South Korea;10. Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg East, Denmark Sino-Danish Center for Education and Research, 8000 Aarhus, Denmark |
| Abstract: | A non-conjugated polymer acceptor PF1-TS4 was firstly synthesized by embedding a thioalkyl segment in the mainchain, which shows excellent photophysical properties on par with a fully conjugated polymer, with a low optical band gap of 1.58 eV and a high absorption coefficient >105 cm−1, a high LUMO level of −3.89 eV, and suitable crystallinity. Matched with the polymer donor PM6, the PF1-TS4-based all-PSC achieved a power conversion efficiency (PCE) of 8.63 %, which is ≈45 % higher than that of a device based on the small molecule acceptor counterpart IDIC16. Moreover, the PF1-TS4-based all-PSC has good thermal stability with ≈70 % of its initial PCE retained after being stored at 85 °C for 180 h, while the IDIC16-based device only retained ≈50 % of its initial PCE when stored at 85 °C for only 18 h. Our work provides a new strategy to develop efficient polymer acceptor materials by linkage of conjugated units with non-conjugated thioalkyl segments. |
| Keywords: | all-polymer solar cells non-conjugated polymer acceptors power conversion efficiency thermal stability thioalkyl chain linkages |