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

United States Patent

8,987,589
March 24, 2015
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
An organic photovoltaic cell includes an anode and a cathode, and a plurality of organic semiconductor layers between the anode and the cathode. At least one of the anode and the cathode is transparent. Each two adjacent layers of the plurality of organic semiconductor layers are in direct contact. The plurality of organic semiconductor layers includes an intermediate layer consisting essentially of a photoconductive material, and two sets of at least three layers. A first set of at least three layers is between the intermediate layer and the anode. Each layer of the first set consists essentially of a different organic semiconductor material having a higher LUMO and a higher HOMO, relative to the material of an adjacent layer of the plurality of organic semiconductor layers closer to the cathode. A second set of at least three layers is between the intermediate layer and the cathode. Each layer of the second set consists essentially of a different organic semiconductor material having a lower LUMO and a lower HOMO, relative to the material of an adjacent layer of the plurality of organic semiconductor layers closer to the anode.
Rand; Barry (Princeton, NJ), Forrest; Stephen R. (Ann Arbor, MI), Burk; Diana Pendergrast (Washington, DC)
The Regents of the University of Michigan (Ann Arbor, MI), The Trustees of Princeton University (Princeton, NJ)
11/ 486,163
20130255758
July 14, 2006
UNITED STATES GOVERNMENT RIGHTS This invention was made with U.S. Government support under Grant No. 339 1012 DE-AC36-98-GO10337 and sub-contract XAT 5-33636-03 awarded by U.S. Department of Energy, National Renewable Energy Laboratory. The government has certain rights in this invention.