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MOLECULAR COMPOSITIONS, MATERIALS, AND METHODS FOR EFFICIENT MULTIPLE EXCITION GENERATION

United States Patent Application

20170141318
A1
View the Complete Application at the US Patent & Trademark Office
Brookhaven National Laboratory - Visit the Office of Technology Commercialization and Partnerships Website
Embodiments of the present invention provides compounds, compositions, and methods for their preparation that provide efficient intramolecular fission, such that local order and strong nearest neighbor coupling is no longer a design constraint. Inventive materials include organic oligomers and polymers designed to exhibit strong intrachain donor-acceptor interactions and provide intramolecular singlet fission, whereby triplet populations can be generated in very high yields of, e.g., 170% or more. The inventive disclosure is directed to polymers of the general formula: [SA-SD]n with a strong electron acceptor (SA), a strong electron donor (SD), and n a positive integer equal to or greater than two; methods for their preparation and monomers used therein, blends, mixtures and formulations containing them; the use of the polymers, blends, mixtures and formulations as semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices, and to OE and OPV devices comprising these polymers, blends, mixtures or formulations.
CAMPOS, Luis MIGUEL (Brooklyn, NY), SFEIR, MATTHEW Y. (Bethpage, NY), XIA, JIANLONG (NEW YORK, NY), BUSBY, ERIK MICHAEL ALLAN (Patchogue, NY), LOW, JONATHAN ZHAOZHI (New York, NY)
15/ 333,043
October 24, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] The present invention was made with government support under contract numbers DE-AC02-98CH-10886, DE-SC0001085, and DE-SC0012704 awarded by the U.S. Department of Energy and contract number CAREER, DMR-1351293 awarded by the National Science Foundation. The United States government may have certain rights in this invention.