Toward Practical Useful Polymers for Highly Efficient Solar Cells via a Random Copolymer Approach

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• 作者：Chunhui Duan ; Ke Gao ; Jacobus J. van Franeker ; Feng Liu ; Martijn M. Wienk ; René A. J. Janssen
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：August 31, 2016
• 年：2016
• 卷：138
• 期：34
• 页码：10782-10785
• 全文大小：293K
• 年卷期：0
• ISSN：1520-5126

文摘

Using benzo[1,2-b:4,5-b′]dithiophene and two matched 5,6-difluorobenzo[2,1,3]thiadiazole-based monomers, we demonstrate that random copolymerization of two electron deficient monomers, alternating with one electron rich monomer, forms a successful approach to synthesize state-of-the-art semiconducting copolymers for organic solar cells. Over a range of compositions, these random copolymers provide impressive power conversion efficiencies (PCEs) of about 8.0%, higher than those of their binary parent polymers, and with little batch-to-batch variation. A PCE over 8% could also be achieved when the active layer was deposited from nonhalogenated solvents at room temperature.