Ultrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells

Yasunari Tamai, Yeli Fan, Vincent O. Kim, Kostiantyn Ziabrev, Akshay Rao, Stephen Barlow, Seth R. Marder, Richard H. Friend, S. Matthew Menke

Research output: Contribution to journalArticlepeer-review

82 Scopus citations


Rapid, long-range charge separation in polymer-fullerene organic solar cells (OSCs) enables electrons and holes to move beyond their Coulomb capture radius and overcome geminate recombination. Understanding the nature of charge generation and recombination mechanisms in efficient, nonfullerene-acceptor-based OSCs are critical to further improve device performance. Here we report charge dynamics in an OSC using a perylene diimide (PDI) dimer acceptor. We use transient absorption spectroscopy to track the time evolution of electroabsorption caused by the dipolar electric field generated between electron-hole pairs as they separate after ionization at the donor-acceptor interface. We show that charges separate rapidly (
Original languageEnglish (US)
Pages (from-to)12473-12481
Number of pages9
JournalACS Nano
Issue number12
StatePublished - Nov 17 2017
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2021-04-13
Acknowledgements: The authors thank the Engineering and Physical Sciences Research Council (EPSRC) and the Winton Programme for the Physics of Sustainability. Y.T. was supported by JSPS Postdoctoral Fellowships for Research Abroad. Work at Georgia Tech was supported by the Department of the Navy, Office of Naval Research award no. N00014-14-1-0580 (CAOP MURI) and through a State-Sponsored Scholarship for Graduate Students to Y.F. from the China Scholarship Council. S.M.M. and R.H.F acknowledge support from the KAUST Competitive Research Grant Program.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • General Physics and Astronomy
  • General Materials Science
  • General Engineering


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