Growth of homogeneous luminescent silicon-terbium nanowires by one-step electrodeposition in ionic liquids

An electrodeposition method for the growth of homogeneous silicon-terbium nanowires (NWs) with green light emission is described. The method involves template-assisted electrochemical co-deposition of Si/Tb NWs with 90-nm diameter from an electrolyte bath containing Si and Tb precursors in an ionic liquid (IL). This method of deposition is advantageous over other conventional techniques as it is relatively simple and cost-effective and avoids harsh deposition conditions. The deposited NWs are of uniform dimensions with homogeneous composition incorporating 10% of Tb and exhibit intense room temperature (RT) luminescence in the visible range due to Tb emission. These results were confirmed by combining classical characterization such as scanning electron microscopy (SEM) and photoluminescence (PL) performed on an assembly of NWs with spatially resolved experiments such as transmission electron microscopy (TEM) and cathodoluminescence (CL). This electrodeposition method provides an alternative and extremely simple approach for depositing silicon-rare earth nanostructures for optical and sensing applications.

Electrodeposition, Luminescence, Nanowires, Silicon/terbium

10.3390/nano10122390

2079-4991

1-9

Thomas, Shibin

f9dd0751-582b-4c35-9725-36fbe08bbda8

Mallet, Jeremy

99a096bc-7589-46d3-a40c-6bf91a8da79c

Bahuleyan, Bijal K.

7aa258ad-00a7-40ca-b6cf-bc3a036b5635

Molinari, Michael

811073e1-f1d5-4282-8016-ddecefbe2975

Thomas, Shibin

f9dd0751-582b-4c35-9725-36fbe08bbda8

Mallet, Jeremy

99a096bc-7589-46d3-a40c-6bf91a8da79c

Bahuleyan, Bijal K.

7aa258ad-00a7-40ca-b6cf-bc3a036b5635

Molinari, Michael

811073e1-f1d5-4282-8016-ddecefbe2975

Thomas, Shibin, Mallet, Jeremy, Bahuleyan, Bijal K. and Molinari, Michael (2020) Growth of homogeneous luminescent silicon-terbium nanowires by one-step electrodeposition in ionic liquids. Nanomaterials, 10 (12), 1-9, [2390]. (doi:10.3390/nano10122390).

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Accepted/In Press date: 25 November 2020

e-pub ahead of print date: 30 November 2020

Additional Information: Funding Information: Author Contributions: Conceptualization, J.M. and M.M.; investigation, S.T., B.K.B., J.M., and M.M.; data curation, S.T. and B.K.B.; writing—original draft preparation, S.T.; writing—review and editing, M.M.; funding acquis1i9ti8o–n2,1 J5.M. [.CarnodssMRe.Mf] [.PAulbl Mauetdh]ors have read and agreed to the published version of the manuscript. 3. Cheng, K.-Y.; Anthony, R.; Kortshagen, U.R.; Holmes, R.J. High-Efficiency Silicon Nanocrystal Light-Emitting Funding: This research was funded by Region Grand Est through the SYNAPSE project. Devices. Nano Lett. 2011, 11, 1952–1956. [CrossRef] [PubMed] Acknowledgments: The authors would like to acknowledge L. Wortham for the technical help with the TEM measurements and J. Michel for providing access to the TEM facilities. S.T., J.M., and M.M. are also thankful to the Region Grand Est, the DRRT Grand Est, and the European FEDER program for the financial support of the Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

Keywords: Electrodeposition, Luminescence, Nanowires, Silicon/terbium