Efficient Fused-Ring Extension of A-D-A-Type Non-Fullerene Acceptors by a Symmetric Replicating Core Unit Strategy
- Authors
- Xia, Tian; Li, Chao; Ryu, Hwa Sook; Guo, Jing; Min, Jie; Woo, Han Young; Sun, Yanming
- Issue Date
- 25-9월-2020
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- conjugation; fused-ring systems; heterocycles; solar cells
- Citation
- CHEMISTRY-A EUROPEAN JOURNAL, v.26, no.54, pp.12411 - 12417
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMISTRY-A EUROPEAN JOURNAL
- Volume
- 26
- Number
- 54
- Start Page
- 12411
- End Page
- 12417
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/53106
- DOI
- 10.1002/chem.202000889
- ISSN
- 0947-6539
- Abstract
- The extension of fused aromatic ring core structures is beneficial for enhancing intramolecular charge transfer and effective pi conjugation in A-D-A-type (A=acceptor; D=donor) non-fullerene acceptors (NFAs). In this work, a novel strategy involving the extension of a fused-ring core by symmetrically replicating the core unit has been developed, and a novel symmetric fused-12-ring NFA, LC81, has been synthesized. When paired with the wide-bandgap polymer donor PBT1-C, the corresponding organic solar cells (OSCs) showed a high power conversion efficiency of 12.71 %, much higher than that of the device based on the reference NFA, TPTT-4F. Moreover, the LC81-based OSC displayed a lower energy loss and a better ambient stability than the TPTT-4F-based device. Our results indicate that the extension of the fused-ring core by the symmetric replicating core unit strategy is an effective approach to promoting the photovoltaic characteristics of A-D-A-type NFAs.
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