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DOI: 10.5445/IR/1000081465
Veröffentlicht am 22.05.2018

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

Beri, Deski; Busko, Dmitry; Mazilkin, Andrey; Howard, Ian A.; Richards, Bryce S.; Turshatov, Andrey

Abstract (englisch):
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.

Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2046-2069
URN: urn:nbn:de:swb:90-814654
KITopen-ID: 1000081465
HGF-Programm 43.23.03 (POF III, LK 01)
Erschienen in RSC Advances
Band 8
Heft 18
Seiten 9979–9984
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Scopus
Web of Science
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