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Strong room-temperature visible photoluminescence of amorphous Si nanowires prepared by electrodeposition in ionic liquids

Strong room-temperature visible photoluminescence of amorphous Si nanowires prepared by electrodeposition in ionic liquids
Strong room-temperature visible photoluminescence of amorphous Si nanowires prepared by electrodeposition in ionic liquids
Visible photoluminescence at room temperature is reported from the silicon nanowires prepared by electrodeposition in ionic liquids. Nanowires with diameters 110, 200 and 400 nm have been synthe-sized by a template-assisted electrodeposition using ionic liquid electrolytes. The obtained nanowires are amorphous in nature and possess robustness and good structural and compositional quality. The PL measurements at room temperature reveal a strong visible light emission from the 110 nm silicon nanowires. The strong and efficient red luminescence from the nanowires is found to be size dependent and originates from the intrinsic radiative recombination and spatial confinement of carriers in the amorphous silicon nan-owires with a thin surface oxide shell. The silicon nanowires with 110 nm diameter shows an exceptionally high quantum yield > 25%. These light emitting nanowires obtained through a simple alternative growth technique could find applications in future Si-based optoelectronic devices.
amorphous silicon nanowires, electrodeposition, spatial confinement, visible luminescence
2330-4022
2652-2660
Thomas, Shibin
f9dd0751-582b-4c35-9725-36fbe08bbda8
Mallet, Jeremy
99a096bc-7589-46d3-a40c-6bf91a8da79c
Martineau, Florie
719950dd-95bf-462b-a2ad-d34668d5950c
Rinnert, Hervé
55722bc1-e589-4194-9888-ee037f808fef
Molinari, Michael
811073e1-f1d5-4282-8016-ddecefbe2975
Thomas, Shibin
f9dd0751-582b-4c35-9725-36fbe08bbda8
Mallet, Jeremy
99a096bc-7589-46d3-a40c-6bf91a8da79c
Martineau, Florie
719950dd-95bf-462b-a2ad-d34668d5950c
Rinnert, Hervé
55722bc1-e589-4194-9888-ee037f808fef
Molinari, Michael
811073e1-f1d5-4282-8016-ddecefbe2975

Thomas, Shibin, Mallet, Jeremy, Martineau, Florie, Rinnert, Hervé and Molinari, Michael (2018) Strong room-temperature visible photoluminescence of amorphous Si nanowires prepared by electrodeposition in ionic liquids. ACS Photonics, 5 (7), 2652-2660. (doi:10.1021/acsphotonics.8b00208).

Record type: Article

Abstract

Visible photoluminescence at room temperature is reported from the silicon nanowires prepared by electrodeposition in ionic liquids. Nanowires with diameters 110, 200 and 400 nm have been synthe-sized by a template-assisted electrodeposition using ionic liquid electrolytes. The obtained nanowires are amorphous in nature and possess robustness and good structural and compositional quality. The PL measurements at room temperature reveal a strong visible light emission from the 110 nm silicon nanowires. The strong and efficient red luminescence from the nanowires is found to be size dependent and originates from the intrinsic radiative recombination and spatial confinement of carriers in the amorphous silicon nan-owires with a thin surface oxide shell. The silicon nanowires with 110 nm diameter shows an exceptionally high quantum yield > 25%. These light emitting nanowires obtained through a simple alternative growth technique could find applications in future Si-based optoelectronic devices.

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More information

Accepted/In Press date: 21 May 2018
e-pub ahead of print date: 21 May 2018
Published date: 18 July 2018
Keywords: amorphous silicon nanowires, electrodeposition, spatial confinement, visible luminescence

Identifiers

Local EPrints ID: 424773
URI: http://eprints.soton.ac.uk/id/eprint/424773
ISSN: 2330-4022
PURE UUID: 2433f478-b0b7-4bdf-8cb9-409999320103
ORCID for Shibin Thomas: ORCID iD orcid.org/0000-0002-7735-788X

Catalogue record

Date deposited: 05 Oct 2018 11:45
Last modified: 28 Apr 2022 02:25

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Contributors

Author: Shibin Thomas ORCID iD
Author: Jeremy Mallet
Author: Florie Martineau
Author: Hervé Rinnert
Author: Michael Molinari

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