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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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000081465
Veröffentlicht am 22.05.2018
DOI: 10.1039/C7RA13577G
Zitationen: 4
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Lichttechnisches Institut (LTI)
Karlsruhe School of Optics & Photonics (KSOP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 2046-2069
KITopen-ID: 1000081465
HGF-Programm 43.23.03 (POF III, LK 01) Teratronics
Erschienen in RSC Advances
Verlag Royal Society of Chemistry (RSC)
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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