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Organic photovoltaic cells utilizing ultrathin sensitizing layer

United States Patent

September 6, 2011
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A photosensitive device includes a plurality of organic photoconductive materials disposed in a stack between a first electrode and a second electrode, including a first continuous layer of donor host material, a second continuous layer of acceptor host material, and at least one other organic photoconductive material disposed as a plurality of discontinuous islands between the first continuous layer and the second continuous layer. Each of these other photoconductive materials has an absorption spectra different from the donor host material and the acceptor host material. Preferably, each of the discontinuous islands consists essentially of a crystallite of the respective organic photoconductive material, and more preferably, the crystallites are nanocrystals.
Forrest; Stephen R. (Ann Arbor, MI), Yang; Fan (Piscataway, NJ), Rand; Barry P. (Somers, NY)
The Trustees of Princeton University (Princeton, NJ)
11/ 566,134
December 1, 2006
UNITED STATES GOVERNMENT RIGHTS This invention was made with U.S. Government support under Contract 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.