Systematic Merging of Nonfullerene Acceptor π-Extension and Tetrafluorination Strategies Affords Polymer Solar Cells with >16% Efficiency

Guoping Li, Xiaohua Zhang, Leighton O. Jones, Joaquin M. Alzola, Subhrangsu Mukherjee, Liang Wen Feng, Weigang Zhu, Charlotte L. Stern, Wei Huang, Junsheng Yu, Vinod K. Sangwan^*, Dean M. Delongchamp^*, Kevin L. Kohlstedt^*, Michael R. Wasielewski^*, Mark C. Hersam^*, George C. Schatz^*, Antonio Facchetti^*, Tobin J. Marks^*