Size‐Dependent Oxidation of Monodisperse Silicon Nanocrystals with Allylphenylsulfide Surfaces |
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| Authors: | Julia Rinck Dirk Schray Christian Kübel Annie K. Powell Geoffrey A. Ozin |
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| Affiliation: | 1. Karlsruhe Institute of Technology, Center for Functional Nanostructures, Karlsruhe, Germany;2. Institute of Inorganic Chemistry, Karlsruhe, Germany;3. Karlsruhe Institute of Technology, Institute of Nanotechnology, Eggenstein‐Leopoldshafen, Germany;4. Karlsruhe Institute of Technology, Karlsruhe Nano Micro Facility, Eggenstein‐Leopoldshafen, Germany;5. University of Toronto, Lash Miller Chemical Laboratories, Department of Chemistry, Toronto, Ontario, Canada |
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| Abstract: | The synthesis and characterization of size‐separated silicon nanocrystals functionalized with a heteroatom‐substituted organic capping group, allylphenylsulfide, via photochemical hydrosilylation are described for the first time. These silicon nanocrystals form colloidally stable and highly photoluminescent dispersions in non‐polar organic solvents with an absolute quantum yield as high as 52% which is 20% above that of the allylbenzene analogue. Solutions of the size‐separated fractions are characterized over time to monitor the effect of aging in air by following the change of their photoluminescence and absolute quantum yields, supplemented by transmission electron microscopy. |
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| Keywords: | silicon nanocrystals organochalcogenide size separation photoluminescence quantum yield air stability oxidation |
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