About: Femtosecond luminescence spectroscopy of core states in silicon nanocrystals

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present a study of ultrafast carrier transfer from highly luminescent states inside the core of silicon nanocrystal (due to quasidirect transitions) to states on the nanocrystal-matrix interface. This transfer leads to a sub-picosecond luminescence decay, which is followed by a slower decay component induced by carrier relaxation to lower interface states. We investigate the luminescence dynamics for two different surface passivation types and we propose a general model describing spectral dependence of ultrafast carrier dynamics. Our results stress the crucial role of the energy distribution of the interface states on surface-related quenching of quasidirect luminescence in silicon nanocrystals. We discuss how to avoid this quenching in order to bring the attractive properties of the quasidirect recombination closer to exploitation. We present a study of ultrafast carrier transfer from highly luminescent states inside the core of silicon nanocrystal (due to quasidirect transitions) to states on the nanocrystal-matrix interface. This transfer leads to a sub-picosecond luminescence decay, which is followed by a slower decay component induced by carrier relaxation to lower interface states. We investigate the luminescence dynamics for two different surface passivation types and we propose a general model describing spectral dependence of ultrafast carrier dynamics. Our results stress the crucial role of the energy distribution of the interface states on surface-related quenching of quasidirect luminescence in silicon nanocrystals. We discuss how to avoid this quenching in order to bring the attractive properties of the quasidirect recombination closer to exploitation. (en)
Title	Femtosecond luminescence spectroscopy of core states in silicon nanocrystals Femtosecond luminescence spectroscopy of core states in silicon nanocrystals (en)
skos:prefLabel	Femtosecond luminescence spectroscopy of core states in silicon nanocrystals Femtosecond luminescence spectroscopy of core states in silicon nanocrystals (en)
skos:notation	RIV/68378271:_____/10:00356926!RIV11-MSM-68378271
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(IAA101120804), P(KAN400100701), P(LC510), S, Z(AV0Z10100521), Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	24
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Dohnalová, Kateřina Pelant, Ivan Ondič, Lukáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	258963
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/10:00356926
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	silicon nanocrystals; ultrafast spectroscopy; photoluminescence spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	photoluminescence spectroscopy ultrafast spectroscopy silicon nanocrystals
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[C7C71800A043]
http://linked.open...i/riv/nazevZdroje	Optics Express
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	9 (xsd:int)
http://linked.open...vavai/riv/projekt	Center of nanotechnology and materials for nanoelectronics Silicon nanostructures for photonics Functional hybrid nanosystems of semiconductors and metals with organic materials (FUNS)
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	18
http://linked.open...iv/tvurceVysledku	Malý, P. Dohnalová, Kateřina Ondič, Lukáš Pelant, Ivan Trojánek, F. Horrocks, B. R. Little, R. Šiller, L. Žídek, K.
http://linked.open...ain/vavai/riv/wos	000285586800097
http://linked.open...n/vavai/riv/zamer	Physics and technology of nanostructures, surfaces and thin films Condensed Matter Physics – New Materials and Technologies
issn	1094-4087
number of pages	9 (xsd:int)

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