Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission

Abstract Er clustering plays a major role in hindering sufficient optical gain in Er-doped Si materials. For porous Si, the long-standing failure to govern the clustering has been attributed to insufficient knowledge of the several, concomitant and complex processes occurring during the electrochemi...

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Autores principales:	Guido Mula, Tony Printemps, Christophe Licitra, Elisa Sogne, Francesco D’Acapito, Narciso Gambacorti, Nicola Sestu, Michele Saba, Elisa Pinna, Daniele Chiriu, Pier Carlo Ricci, Alberto Casu, Francesco Quochi, Andrea Mura, Giovanni Bongiovanni, Andrea Falqui
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/be50e1570bf14b3ba1dc6a67083a8f55
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spelling	oai:doaj.org-article:be50e1570bf14b3ba1dc6a67083a8f552021-12-02T15:05:08ZDoping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission10.1038/s41598-017-06567-42045-2322https://doaj.org/article/be50e1570bf14b3ba1dc6a67083a8f552017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06567-4https://doaj.org/toc/2045-2322Abstract Er clustering plays a major role in hindering sufficient optical gain in Er-doped Si materials. For porous Si, the long-standing failure to govern the clustering has been attributed to insufficient knowledge of the several, concomitant and complex processes occurring during the electrochemical Er-doping. We propose here an alternative road to solve the issue: instead of looking for an equilibrium between Er content and light emission using 1–2% Er, we propose to significantly increase the electrochemical doping level to reach the filling the porous silicon pores with luminescent Er-rich material. To better understand the intricate and superposing phenomena of this process, we exploit an original approach based on needle electron tomography, EXAFS and photoluminescence. Needle electron tomography surprisingly shows a heterogeneous distribution of Er content in the silicon thin pores that until now couldn’t be revealed by the sole use of scanning electron microscopy compositional mapping. Besides, while showing that pore filling leads to enhanced photoluminescence emission, we demonstrate that the latter is originated from both erbium oxide and silicate. These results give a much deeper understanding of the photoluminescence origin down to nanoscale and could lead to novel approaches focused on noteworthy enhancement of Er-related photoluminescence in porous silicon.Guido MulaTony PrintempsChristophe LicitraElisa SogneFrancesco D’AcapitoNarciso GambacortiNicola SestuMichele SabaElisa PinnaDaniele ChiriuPier Carlo RicciAlberto CasuFrancesco QuochiAndrea MuraGiovanni BongiovanniAndrea FalquiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Guido Mula Tony Printemps Christophe Licitra Elisa Sogne Francesco D’Acapito Narciso Gambacorti Nicola Sestu Michele Saba Elisa Pinna Daniele Chiriu Pier Carlo Ricci Alberto Casu Francesco Quochi Andrea Mura Giovanni Bongiovanni Andrea Falqui Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission
description	Abstract Er clustering plays a major role in hindering sufficient optical gain in Er-doped Si materials. For porous Si, the long-standing failure to govern the clustering has been attributed to insufficient knowledge of the several, concomitant and complex processes occurring during the electrochemical Er-doping. We propose here an alternative road to solve the issue: instead of looking for an equilibrium between Er content and light emission using 1–2% Er, we propose to significantly increase the electrochemical doping level to reach the filling the porous silicon pores with luminescent Er-rich material. To better understand the intricate and superposing phenomena of this process, we exploit an original approach based on needle electron tomography, EXAFS and photoluminescence. Needle electron tomography surprisingly shows a heterogeneous distribution of Er content in the silicon thin pores that until now couldn’t be revealed by the sole use of scanning electron microscopy compositional mapping. Besides, while showing that pore filling leads to enhanced photoluminescence emission, we demonstrate that the latter is originated from both erbium oxide and silicate. These results give a much deeper understanding of the photoluminescence origin down to nanoscale and could lead to novel approaches focused on noteworthy enhancement of Er-related photoluminescence in porous silicon.
format	article
author	Guido Mula Tony Printemps Christophe Licitra Elisa Sogne Francesco D’Acapito Narciso Gambacorti Nicola Sestu Michele Saba Elisa Pinna Daniele Chiriu Pier Carlo Ricci Alberto Casu Francesco Quochi Andrea Mura Giovanni Bongiovanni Andrea Falqui
author_facet	Guido Mula Tony Printemps Christophe Licitra Elisa Sogne Francesco D’Acapito Narciso Gambacorti Nicola Sestu Michele Saba Elisa Pinna Daniele Chiriu Pier Carlo Ricci Alberto Casu Francesco Quochi Andrea Mura Giovanni Bongiovanni Andrea Falqui
author_sort	Guido Mula
title	Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission
title_short	Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission
title_full	Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission
title_fullStr	Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission
title_full_unstemmed	Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission
title_sort	doping porous silicon with erbium: pores filling as a method to limit the er-clustering effects and increasing its light emission
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/be50e1570bf14b3ba1dc6a67083a8f55
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Doping porous silicon with erbium: pores filling as a method to limit the Er-clustering effects and increasing its light emission

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