COMPOSITIONS AND METHODS FOR THE DOWNCONVERSION OF LIGHT

摘要

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.

主权项

1. A method of downconverting light, the method comprising:
applying light having a first average wavelength to an organic material associated with a nanocrystal and a ligand, the organic material comprising a heteroacene, a perylene, a phthalocyanine, an oligothiophene, a furane, an anthracene, a rubrene, or a pentacene, and the nanocrystal comprising a group III-V compound, a group II-VI compound, or a group IV element, the ligand being an organic compound having a linear carbon chain length between 5 carbon atoms and 20 carbon atoms; and determining light emitted from the nanocrystal at a second average wavelength, wherein the second average wavelength is greater than the first average wavelength.