Nanocrystal quantum dots are excellent emitters of light, but energizing that emission electrically has proved difficult. A newly discovered non-radiative energy-transfer process that allows electron–hole pairs to be generated in quantum wells, and then transferred into quantum dots, could lead to a new generation of ultra-high-efficiency light sources for use at scales ranging from nano-optics to a city block.
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(Picture courtesy of Mollie Boorman and Marc Achermann.)
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Stockman, M. From nano-optics to street lights. Nature Mater 3, 423–424 (2004). https://doi.org/10.1038/nmat1169
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DOI: https://doi.org/10.1038/nmat1169
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