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Organic photosensitive cells grown on rough electrode with nano-scale morphology control

United States Patent

June 7, 2011
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
An optoelectronic device and a method for fabricating the optoelectronic device includes a first electrode disposed on a substrate, an exposed surface of the first electrode having a root mean square roughness of at least 30 nm and a height variation of at least 200 nm, the first electrode being transparent. A conformal layer of a first organic semiconductor material is deposited onto the first electrode by organic vapor phase deposition, the first organic semiconductor material being a small molecule material. A layer of a second organic semiconductor material is deposited over the conformal layer. At least some of the layer of the second organic semiconductor material directly contacts the conformal layer. A second electrode is deposited over the layer of the second organic semiconductor material. The first organic semiconductor material is of a donor-type or an acceptor-type relative to the second organic semiconductor material, which is of the other material type.
Yang; Fan (Piscataway, NJ), Forrest; Stephen R. (Ann Arbor, MI)
The Trustees of Princeton University (Princeton, NJ)
11/ 483,642
July 11, 2006
UNITED STATES GOVERNMENT RIGHTS This invention was made with government support under Contract No. XAT-5-33636-03 awarded by U.S. Department of Energy, National Renewable Energy Laboratory. The government has certain rights in the invention.