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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
The present invention generally relates to composition and methods for downconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the organic material and the nanocrystal. In certain embodiments, the nanocrystal has a first excited energy state with an energy less than a triplet energy state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the organic material to produce two triplet excitons. The triplet excitons may then transfer to the nanocrystal via the ligand, where they can undergo recombination, resulting in the formation low energy photons.
Congreve, Daniel N. (Cambridge, MA), Thompson, Nicholas John (Hamilton, NJ), Wilson, Mark W.B. (Somerville, MA), Wu, Mengfei (Cambridge, MA), Baldo, Marc A. (Lexington, MA), Bawendi, Moungi G. (Cambridge, MA), Bulovic, Vladimir (Lexington, MA)
Massachusetts Institute of Technology (Cambridge MA)
15/ 045,011
February 16, 2016
GOVERNMENT FUNDING [0002] This invention was made with Government support under Grant No. DE-SC0001088 awarded by the Department of Energy. The Government has certain rights in the invention.