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Unfused Nonfullerene Acceptors Based on Simple Dipolar Merocyanines |
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| Authors: | Yibin Li Xin Liu Hongtao Liu Dr. Jiangsheng Yu Dr. Zhong'an Li |
| Affiliation: | 1. Key Laboratory for Material Chemistry of Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, P. R. China These authors contributed equally to this work.;2. MIIT Key Laboratory of Advanced Solid Laser, School of Electronic and Optical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Xuanwu District, Nanjing, P. R. China These authors contributed equally to this work.;3. Key Laboratory for Material Chemistry of Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, P. R. China;4. MIIT Key Laboratory of Advanced Solid Laser, School of Electronic and Optical Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Xuanwu District, Nanjing, P. R. China |
| Abstract: | Merocyanine (MC) dyes exhibit facile synthesis and attractive optical properties, making them widely studied as the donor materials in organic solar cells (OSCs). In this study, for the first time, simple indole-based MCs are successfully designed as unfused nonfullerene acceptors (NFAs) for OSCs by forming dimers with A−D-π-D−A structure, which possess enhanced photostability compared to the well-known ITIC acceptor and high electron mobility in blend films. When blended with P3HT donor, one of the dimers, i. e. Z2, shows a good cell efficiency of 3.53 %, which outperforms the performance of most of P3HT/NFA blends, particularly for unfused systems, and thus indicates good potential of simple MCs as NFAs. |
| Keywords: | donor-acceptor systems nonfullerene acceptors organic solar cells unfused structure |