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

SYSNO ASEP	0343173
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	White-emitting oxidized silicon nanocrystals: Discontinuity in spectral development with reducing size
Author(s)	Dohnalová, Kateřina (FZU-D)_{RID, ORCID} Ondič, Lukáš (FZU-D)_{RID, ORCID} Kůsová, Kateřina (FZU-D)_{RID, ORCID} Pelant, Ivan (FZU-D)_{RID, ORCID, SAI} Rehspringer, J.L. (FR) Mafouana, R.-R. (FR)
Source Title	Journal of Applied Physics. - : AIP Publishing - ISSN 0021-8979 Roč. 107, č. 5 (2010), 053102/1-053102/6
Number of pages	6 s.
Language	eng - English
Country	US - United States
Keywords	silicon nanocrystals ; luminescence ; spectral shift
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	IAA101120804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	LC510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	KJB100100903 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GA202/07/0818 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100521 - FZU-D (2005-2011)
UT WOS	000275657500003
DOI	10.1063/1.3289719
Annotation	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.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2011

Number of the records: 1