Efficient Organic Solar Cells with Helical Perylene Diimide Electron Acceptors

作者：Yu Zhong, Minh Tuan Trinh, Rongsheng Chen, Wei Wang, Petr P. Khlyabich, Bharat Kumar, Qizhi Xu, Chang‐Yong Nam, Matthew Y. Sfeir, Charles T. Black, Michael L. Steigerwald, Yueh‐Lin Loo, Shengxiong Xiao, Fay Ng, Xiaoyang Zhu, Colin P. Nuckolls · 发表于：Journal of the American Chemical Society · 年份：2014 · DOI：10.1021/ja5092613 · 被引用次数：433 · 研究领域：Organic Electronics and Photovoltaics、Conducting polymers and applications、Perovskite Materials and Applications

We report an efficiency of 6.1% for a solution-processed non-fullerene solar cell using a helical perylene diimide (PDI) dimer as the electron acceptor. Femtosecond transient absorption spectroscopy revealed both electron and hole transfer processes at the donor-acceptor interfaces, indicating that charge carriers are created from photogenerated excitons in both the electron donor and acceptor phases. Light-intensity-dependent current-voltage measurements suggested different recombination rates under short-circuit and open-circuit conditions.