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Enhanced bulk heterojunction devices prepared by thermal and solvent vapor annealing processes

United States Patent

9,768,402
September 19, 2017
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A method of preparing a bulk heterojunction organic photovoltaic cell through combinations of thermal and solvent vapor annealing are described. Bulk heterojunction films may prepared by known methods such as spin coating, and then exposed to one or more vaporized solvents and thermally annealed in an effort to enhance the crystalline nature of the photoactive materials.
Forrest; Stephen R. (Ann Arbor, MI), Thompson; Mark E. (Anaheim, CA), Wei; Guodan (San Jose, CA), Wang; Siyi (Los Angeles, CA)
University of Southern California (Los Angeles, CA), The Regents of the University of Michigan (Ann Arbor, MI)
13/ 080,759
20130210189
April 6, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH The subject matter of this application was prepared with U.S. Government support under Contract No. DE-FG36-08G018022 awarded by U.S. Department of Energy, National Renewable Energy Laboratory and FA9550-07-1-0364 awarded by the Air Force Office of Scientific Research. The government has certain rights in the subject matter of this application.