Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices

We report results of investigating carrier recombination in silicon nanocrystal/silicon dioxide superlattices. The superlattices prepared by nitrogen-free plasma enhanced chemical vapour deposition contained layers of silicon nanocrystals. Femtosecond transient transmission optical spectroscopy was...

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Autores principales: Chlouba, T., Trojánek, F., Laube, J., Hiller, D., Gutsch, S., Zacharias, M., Malý, P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5786032/
https://www.ncbi.nlm.nih.gov/pubmed/29374259
http://dx.doi.org/10.1038/s41598-018-19967-x
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author Chlouba, T.
Trojánek, F.
Laube, J.
Hiller, D.
Gutsch, S.
Zacharias, M.
Malý, P.
author_facet Chlouba, T.
Trojánek, F.
Laube, J.
Hiller, D.
Gutsch, S.
Zacharias, M.
Malý, P.
author_sort Chlouba, T.
collection PubMed
description We report results of investigating carrier recombination in silicon nanocrystal/silicon dioxide superlattices. The superlattices prepared by nitrogen-free plasma enhanced chemical vapour deposition contained layers of silicon nanocrystals. Femtosecond transient transmission optical spectroscopy was used to monitor carrier mechanisms in the samples. The three-particle Auger recombination was observed in accord with previous reports. However, under high pump intensities (high photoexcited carrier densities) the bimolecular process dominated the recombination. Detailed analysis of measured data and fitting procedure made it possible to follow and quantify the interplay between the two recombination processes. The bimolecular recombination was interpreted in terms of the trap-assisted Auger recombination.
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spelling pubmed-57860322018-02-07 Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices Chlouba, T. Trojánek, F. Laube, J. Hiller, D. Gutsch, S. Zacharias, M. Malý, P. Sci Rep Article We report results of investigating carrier recombination in silicon nanocrystal/silicon dioxide superlattices. The superlattices prepared by nitrogen-free plasma enhanced chemical vapour deposition contained layers of silicon nanocrystals. Femtosecond transient transmission optical spectroscopy was used to monitor carrier mechanisms in the samples. The three-particle Auger recombination was observed in accord with previous reports. However, under high pump intensities (high photoexcited carrier densities) the bimolecular process dominated the recombination. Detailed analysis of measured data and fitting procedure made it possible to follow and quantify the interplay between the two recombination processes. The bimolecular recombination was interpreted in terms of the trap-assisted Auger recombination. Nature Publishing Group UK 2018-01-26 /pmc/articles/PMC5786032/ /pubmed/29374259 http://dx.doi.org/10.1038/s41598-018-19967-x Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Chlouba, T.
Trojánek, F.
Laube, J.
Hiller, D.
Gutsch, S.
Zacharias, M.
Malý, P.
Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices
title Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices
title_full Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices
title_fullStr Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices
title_full_unstemmed Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices
title_short Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices
title_sort interplay of bimolecular and auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5786032/
https://www.ncbi.nlm.nih.gov/pubmed/29374259
http://dx.doi.org/10.1038/s41598-018-19967-x
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