Broadband luminescence in defect-engineered electrochemically produced porous Si/ZnO nanostructures

Dellis, S, Pliatsikas, N, Kalfagiannis, N ORCID: https://orcid.org/0000-0002-4030-5525, Lidor-Shalev, O, Papaderakis, A, Vourlias, G, Sotiropoulos, S, Koutsogeorgis, DC ORCID: https://orcid.org/0000-0001-6167-1084, Mastai, Y and Patsalas, P, 2018. Broadband luminescence in defect-engineered electrochemically produced porous Si/ZnO nanostructures. Scientific Reports, 8: 6988. ISSN 2045-2322

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Abstract

The fabrication, by an all electrochemical process, of porous Si/ZnO nanostructures with engineered structural defects, leading to strong and broadband deep level emission from ZnO, is presented. Such nanostructures are fabricated by a combination of metal-assisted chemical etching of Si and direct current electrodeposition of ZnO. It makes the whole fabrication process low-cost, compatible with Complementary Metal-Oxide Semiconductor technology, scalable and easily industrialised. The photoluminescence spectra of the porous Si/ZnO nanostructures reveal a correlation between the lineshape, as well as the strength of the emission, with the morphology of the underlying porous Si, that control the induced defects in the ZnO. Appropriate fabrication conditions of the porous Si lead to exceptionally bright Gaussian-type emission that covers almost the entire visible spectrum, indicating that porous Si/ZnO nanostructures could be a cornerstone material towards white-light-emitting devices.

Item Type:	Journal article
Publication Title:	Scientific Reports
Creators:	Dellis, S., Pliatsikas, N., Kalfagiannis, N., Lidor-Shalev, O., Papaderakis, A., Vourlias, G., Sotiropoulos, S., Koutsogeorgis, D.C., Mastai, Y. and Patsalas, P.
Publisher:	Nature Publishing Group
Date:	3 May 2018
Volume:	8
ISSN:	2045-2322
Identifiers:	Number Type 10.1038/s41598-018-24684-6 DOI 24684 Publisher Item Identifier
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	11 May 2018 13:50
Last Modified:	11 May 2018 13:54
URI:	https://irep.ntu.ac.uk/id/eprint/33544

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