Re-evaluating the role of sterics and electronic coupling in determining the open-circuit voltage of organic solar cells

Kenneth Graham, Patrick Erwin, Dennis Nordlund, Koen Vandewal, Ruipeng Li, Guy Olivier Ngongang Ndjawa, Eric T. Hoke, Alberto Salleo, Mark E. Thompson, Michael D. McGehee, Aram Amassian

Research output: Contribution to journalArticlepeer-review

93 Scopus citations


The effects of sterics and molecular orientation on the open-circuit voltage and absorbance properties of charge-transfer states are explored in model bilayer organic photovoltaics. It is shown that the open-circuit voltage correlates linearly with the charge-transfer state energy and is not significantly influenced by electronic coupling. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)6076-6082
Number of pages7
JournalAdvanced Materials
Issue number42
StatePublished - Jul 30 2013

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1-015-21
Acknowledgements: This publication was supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015-21) and was made possible by King Abdullah University of Science and Technology (KAUST). Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource, a Directorate of SLAC National Accelerator Laboratory and an Office of Science User Facility operated for the US Department of Energy Office of Science by Stanford University. We also acknowledge Michael F. Toney for assistance with GIWAXS measurements at beamline 11-3. K.R.G. and A.A. acknowledge SABIC for a post-doctoral fellowship. G.O.N.N., K.R.G., M.D.M., and A.A. acknowledge the Office of Competitive Research Funds for a GRP-CF award. This work was partially supported by the Department of Energy, Laboratory Directed Research and Development funding, under contract DE-AC02-76SF00515 (K.V.).

ASJC Scopus subject areas

  • Mechanics of Materials
  • General Materials Science
  • Mechanical Engineering


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