Efficient Organic Solar Cells with Helical Perylene Diimide Electron Acceptors
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- 作者：Yu Zhong ; M. Tuan Trinh ; Rongsheng Chen ; Wei Wang ; Petr P. Khlyabich ; Bharat Kumar ; Qizhi Xu ; Chang-Yong Nam ; Matthew Y. Sfeir ; Charles Black ; Michael L. Steigerwald ; Yueh-Lin Loo ; Shengxiong Xiao ; Fay Ng ; X.-Y. Zhu ; Colin Nuckolls
- 刊名：Journal of the American Chemical Society
- 出版年：2014
- 出版时间：October 29, 2014
- 年：2014
- 卷：136
- 期：43
- 页码：15215-15221
- 全文大小：477K
- ISSN：1520-5126
文摘
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鈥揳cceptor interfaces, indicating that charge carriers are created from photogenerated excitons in both the electron donor and acceptor phases. Light-intensity-dependent current鈥搗oltage measurements suggested different recombination rates under short-circuit and open-circuit conditions.