Abstract
The realization of high-efficiency organic solar cells (OSCs) relies largely on donor polymers. However, high-performance donor polymers are limited to a handful of building blocks, which usually suffer from lengthy synthesis and high production cost. Moreover, most donor polymers exhibited strong batch-to-batch variation. Herein, we report a new building block, 3-cyanothiophene (CT), which features a very simple asymmetric structure and facile synthesis. The donor polymer (PBCT-2F) based on the CT unit realized a remarkable power conversion efficiency (PCE) of 17.1%. More importantly, PBCT-2F exhibited excellent batch-to-batch reproducibility. The six polymer batches with molecular weights ranging from 18 to 74 kDa produced very similar PCEs: 15.9-17.1% and 12.7-13.2% when the polymer was blended with Y6 and IT-4F, respectively. These results suggest the great potential of PBCT-2F for industrial synthesis and large-scale manufacturing of OSC modules. This work also demonstrates the bright future of CT units for constructing high-performance donor polymers.
| Original language | English |
|---|---|
| Pages (from-to) | 5530-5540 |
| Number of pages | 11 |
| Journal | Energy & Environmental Science |
| Volume | 14 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2021 |
Bibliographical note
Funding Information:X. Y., Y. Z., and T. Z. contributed equally to this work. The research was financially supported by the Ministry of Science and Technology of China (2019YFA0705900 and 2017YFA0206600), the National Natural Science Foundation of China (21875072 and U20A6002), Guangdong Innovative and Entrepreneurial Research Team Program (2019ZT08L075), Beijing National Laboratory for Molecular Sciences (BNLMS201901), and the Fundamental Research Funds for the Central Universities (South China University of Technology, No. D2190310).
Funding
X. Y., Y. Z., and T. Z. contributed equally to this work. The research was financially supported by the Ministry of Science and Technology of China (2019YFA0705900 and 2017YFA0206600), the National Natural Science Foundation of China (21875072 and U20A6002), Guangdong Innovative and Entrepreneurial Research Team Program (2019ZT08L075), Beijing National Laboratory for Molecular Sciences (BNLMS201901), and the Fundamental Research Funds for the Central Universities (South China University of Technology, No. D2190310).
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
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CCDC 2092056: Experimental Crystal Structure Determination
Zhan, T. (Contributor), Oh, J. (Contributor), He, Z. (Contributor), Zhao, Y. (Contributor), Cao, Y. (Contributor), Li, J. (Contributor), Cai, P. (Contributor), Wang, X. (Contributor), Wang, Z. (Contributor), Xie, Z. (Contributor), Zhou, J. (Contributor), Huang, F. (Contributor), Yuan, X. (Contributor), Duan, C. (Contributor), Pang, S. (Contributor) & Yang, C. (Contributor), Cambridge Crystallographic Data Centre, 18 Aug 2021
DOI: 10.5517/ccdc.csd.cc286yp4
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