Compositional grading of colloidal quantum dots enables electrically driven amplification of light, bringing electrically driven lasers from these materials very close.
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Samuel, I. Electrifying quantum dots for lasers. Nature Mater 17, 9–10 (2018). https://doi.org/10.1038/nmat5040
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DOI: https://doi.org/10.1038/nmat5040
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