Abstract
Silicon nanocrystals with diameters of less than 5 nm show efficient room temperature pho-toluminescence (PL). Previous reports of PL quantum yields for ensembles of silicon quantum dots have usually been in the few percent range, and generally less than 30%. Here we report the plasma synthesis of silicon quantum dots and their subsequent wet-chemical surface passivation with organic ligands while strictly excluding oxygen. Photoluminescence quantum yields as high as 62have been achieved at peak wavelengths of about 789 nm.
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Mangolini, L., Jurbergs, D., Rogojina, E. et al. Plasma Synthesis and Surface Passivation of Silicon Quantum Dots with Photoluminescence Quantum Yields higher than 60%. MRS Online Proceedings Library 934, 104 (2006). https://doi.org/10.1557/PROC-0934-I01-04
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DOI: https://doi.org/10.1557/PROC-0934-I01-04