Energy-Level Modulation of Small-Molecule Electron Acceptors to Achieve over 12% Efficiency in Polymer Solar Cells

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• 作者：Sunsun Li ; Long Ye ; Wenchao Zhao ; Shaoqing Zhang ; Subhrangsu Mukherjee ; Harald Ade and Jianhui Hou
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：November 9, 2016
• 年：2016
• 卷：28
• 期：42
• 页码：9423-9429
• 全文大小：970K
• ISSN：1521-4095

文摘

Fine energy-level modulations of small-molecule acceptors (SMAs) are realized via subtle chemical modifications on strong electron-withdrawing end-groups. The two new SMAs (IT-M and IT-DM) end-capped by methyl-modified dicycanovinylindan-1-one exhibit upshifted lowest unoccupied molecular orbital (LUMO) levels, and hence higher open-circuit voltages can be observed in the corresponding devices. Finally, a top power conversion efficiency of 12.05% is achieved.