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- Title
Post‐Treatment‐Free Main Chain Donor and Side Chain Acceptor (D‐<italic>s</italic>‐A) Copolymer for Efficient Nonfullerene Solar Cells with a Small Voltage Loss.
- Authors
Liao, Zhihui; Wang, Yilin; An, Yongkang; Tan, Yun; Meng, Xiangchuang; Wu, Feiyan; Chen, Lie; Chen, Yiwang
- Abstract
Abstract: Main chain donor and side chain acceptor (D‐<italic>s</italic>‐A) copolymers are an important branch of the D–A copolymer family. However, the development of D‐<italic>s</italic>‐A copolymers significantly falls behind the alternative D–A copolymers, especially for organic solar cells, because a breakthrough in device performance is not yet obtained with a reported power conversion efficiency (PCE) of 2%–4%. Herein, a newly developed D‐<italic>s</italic>‐A copolymer <bold>PDRCNBDT</bold>, bearing 2‐(1, 1‐dicyanomethylene) rhodanine pendant group as the donor material, delivers a high PCE of 5.3% for nonfullerene solar cells. To the best of our knowledge, this is the best value reported for D‐<italic>s</italic>‐A copolymers to date. The improved PCE is observed to be associated with a very small energy loss (<italic>E</italic>loss) of 0.57 eV, accompanied by a high open‐circuit voltage (<italic>V</italic>oc) of 1.015 eV. It is important to note that this efficient D‐<italic>s</italic>‐A copolymer is employed in organic solar cells (OSCs), free of additive and annealing treatments.
- Subjects
CHAIN scission; FULLERENES; SOLAR cells; COPOLYMERS; ANNEALING of metals
- Publication
Macromolecular Rapid Communications, 2018, Vol 39, Issue 7, p1
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.201700706