An acrylated fullerene derivative for efficient and thermally stable polymer solar cells |
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| Authors: | Jin-Long Wang Xue-Qiang Chen Xiang Yao Si-Cheng Wu Li-Na Liu Wen-Jing Xiao Hongyu Wang Jingjing Li Zhengquan Lu Wei-Shi Li |
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| Affiliation: | 1. Department of Chemistry, College of Science, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China;2. Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, PR China;3. Engineering Research Center of Zhengzhou for High Performance Organic Functional Materials, Zhengzhou Institute of Technology, 6 Yingcai Street, Huiji District, Zhengzhou 450044, PR China |
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| Abstract: | The continuous microstructure evolution occurring in active layers of polymer-fullerene solar cells is one of the main causes for their device instability. With aim to tackle it, this work developed a new polymerizable fullerene acceptor, [6,6]-phenyl-C61-butyl acrylate (PC61BA). It was found that PC61BA has similar light-absorption properties and HOMO and LUMO energy levels as [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM), and can be converted into insoluble oligomers upon heating at 150 °C. Polymer-fullerene solar cells using poly(3-hexylthiophene) (P3HT) as donor and PC61BA as acceptor exhibited an optimized efficiency of 3.54%, the performance comparable to P3HT/PC61BM cells (optimized efficiency: 3.70%). But, the former possess much better thermal stability than the latter owing to aggregation suppression by the polymerized PC61BA. These results indicate that PC61BA, unlike most previous reported, is a unique polymerizable fullerene derivative that can be used alone as acceptor to achieve both efficient and thermally stable polymer solar cells. |
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| Keywords: | Polymer solar cells Organic photovoltaic materials Fullerene Stability Polymerizable |
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