Novel Star-Shaped Helical Perylene Diimide Electron Acceptors for Efficient Additive-Free Non-Fullerene Organic Solar Cells

M. Wu, J. P. Yi, L. Chen, G. He, F. Chen, M. Y. Sfeir, J. Xia
ACS Applied Materials & Interfaces, 10 (33), 27894–27901 (2018).   DOI:  10.1021/acsami.8b06126