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Architectures and criteria for the design of high efficiency organic photovoltaic cells

United States Patent

March 31, 2015
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A method for fabricating an organic photovoltaic cell includes providing a first electrode; depositing a series of at least seven layers onto the first electrode, each layer consisting essentially of a different organic semiconductor material, the organic semiconductor material of at least an intermediate layer of the sequence being a photoconductive material; and depositing a second electrode onto the sequence of at least seven layers. One of the first electrode and the second electrode is an anode and the other is a cathode. The organic semiconductor materials of the series of at least seven layers are arranged to provide a sequence of decreasing lowest unoccupied molecular orbitals (LUMOs) and a sequence of decreasing highest occupied molecular orbitals (HOMOs) across the series from the anode to the cathode.
Rand; Barry (Princeton, NJ), Forrest; Stephen R. (Ann Arbor, MI), Pendergrast Burk; Diane (Middleton, DE)
The Trustees of Princeton University (Princeton, NJ), The Regents of the University of Michigan (Ann Arbor, MI)
13/ 965,903
August 13, 2013
GOVERNMENT RIGHTS This invention was made with U.S. Government support under Grant No. DE-AC36-98G010337 awarded by U.S. Department of Energy. The government has certain rights in this invention.