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Issue 18, 2018, Issue in Progress
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Highly photoluminescent and stable silicon nanocrystals functionalized via microwave-assisted hydrosilylation

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Abstract

Herein, we report a microwave-assisted hydrosilylation (MWH) reaction for the surface passivation of silicon nanocrystals (Si-NCs) with linear alkenes. The MWH reaction requires only 20 minutes and allows us to produce Si-NCs with high photoluminescence quantum yields (PLQYs), reaching 39% with an emission maximum of 860 nm. Furthermore, we investigated the effect of ligand length on the photoluminescence properties of Si-NCs. We tested six alkenes with an even number of carbon atoms (from hexene-1 to hexadecene-1). The highest PLQY combined with a long stability (test period of 6 months) was observed when capping with the shortest ligand, hexene-1. The use of microwave heating turns the hydrosilylation step into a facile and sustainable process. In order to provide insight into the emissive properties of Si-NCs surface oxidation and luminescence decay were investigated using Fourier-transform infrared spectroscopy and time-resolved photoluminescence measurements.

Graphical abstract: Highly photoluminescent and stable silicon nanocrystals functionalized via microwave-assisted hydrosilylation

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Publication details

The article was received on 22 Dec 2017, accepted on 27 Feb 2018 and first published on 12 Mar 2018


Article type: Paper
DOI: 10.1039/C7RA13577G
Citation: RSC Adv., 2018,8, 9979-9984
  • Open access: Creative Commons BY license
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    Highly photoluminescent and stable silicon nanocrystals functionalized via microwave-assisted hydrosilylation

    D. Beri, D. Busko, A. Mazilkin, I. A. Howard, B. S. Richards and A. Turshatov, RSC Adv., 2018, 8, 9979
    DOI: 10.1039/C7RA13577G

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