Head-to-Head Linkage Containing Bithiophene-Based Polymeric Semiconductors for Highly Efficient Polymer Solar Cells

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• 作者：Shengbin Shi ; Qiaogan Liao ; Yumin Tang ; Han Guo ; Xin Zhou ; Yulun Wang ; Tingbin Yang ; Yongye Liang ; Xing Cheng ; Feng Liu and Xugang Guo
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：December 7, 2016
• 年：2016
• 卷：28
• 期：45
• 页码：9969-9977
• 全文大小：1989K
• ISSN：1521-4095

文摘

Narrow bandgap (1.37–1.46 eV) polymers incorporating a head-to-head linkage containing 3-alkoxy-3′-alkyl-2,2′-bithiophene are synthesized. The head-to-head linkage enables polymers with sufficient solubility and the noncovalent sulfur–oxygen interaction affords polymers with high degree of backbone planarity and film ordering. When integrated into polymer solar cells, the polymers show a promising power conversion efficiency approaching 10%.