About: White-emitting oxidized silicon nanocrystals: Discontinuity in spectral development with reducing size

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Small oxidized silicon nanocrystals of average sizes below 3.5 nm are prepared using modified electrochemical etching of a silicon wafer. Modifications introduced in the etching procedure together with postetching treatment in H2O2 lead to a decrease in the nanocrystalline core size and also, to some extent, to changes in the surface oxide. The interplay between these two factors allows us to blueshift the photoluminescence (PL) spectrum from 680 down to 590 nm, which is accompanied by changes in PL dynamics. This continual development, however, stops at about 590 nm, below which abrupt switching to fast decaying blue emission band at about 430 nm was observed. Discontinuity of the spectral shift and possible relation between both bands are discussed. Small oxidized silicon nanocrystals of average sizes below 3.5 nm are prepared using modified electrochemical etching of a silicon wafer. Modifications introduced in the etching procedure together with postetching treatment in H2O2 lead to a decrease in the nanocrystalline core size and also, to some extent, to changes in the surface oxide. The interplay between these two factors allows us to blueshift the photoluminescence (PL) spectrum from 680 down to 590 nm, which is accompanied by changes in PL dynamics. This continual development, however, stops at about 590 nm, below which abrupt switching to fast decaying blue emission band at about 430 nm was observed. Discontinuity of the spectral shift and possible relation between both bands are discussed. (en)
Title	White-emitting oxidized silicon nanocrystals: Discontinuity in spectral development with reducing size White-emitting oxidized silicon nanocrystals: Discontinuity in spectral development with reducing size (en)
skos:prefLabel	White-emitting oxidized silicon nanocrystals: Discontinuity in spectral development with reducing size White-emitting oxidized silicon nanocrystals: Discontinuity in spectral development with reducing size (en)
skos:notation	RIV/68378271:_____/10:00343173!RIV11-GA0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/07/0818), P(IAA101120804), P(KJB100100903), P(LC510), Z(AV0Z10100521)
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Kůsová, Kateřina 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	298788
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/10:00343173
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	silicon nanocrystals; luminescence; spectral shift (en)
http://linked.open.../riv/klicoveSlovo	luminescence spectral shift silicon nanocrystals
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[C747E7A542DB]
http://linked.open...i/riv/nazevZdroje	Journal of Applied Physics
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Center of nanotechnology and materials for nanoelectronics Nanocomposites from silicon and diamond nanocrystals for optoelectronic applications Silicon nanostructures for photonics Silicon nanophotonics - from single nanocrystals to photonic structures
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	107
http://linked.open...iv/tvurceVysledku	Dohnalová, Kateřina Ondič, Lukáš Kůsová, Kateřina Pelant, Ivan Mafouana, R.-R. Rehspringer, J. L.
http://linked.open...ain/vavai/riv/wos	000275657500003
http://linked.open...n/vavai/riv/zamer	Physics and technology of nanostructures, surfaces and thin films
issn	0021-8979
number of pages	6 (xsd:int)

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