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Spectral and dynamical study of nonlinear luminescence from silicon nanocrystals excited by ultrashort pulses

SYSNO ASEP	0331687
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Spectral and dynamical study of nonlinear luminescence from silicon nanocrystals excited by ultrashort pulses
Title	Stuidum spektrálních a dynamických vlastností nelineární luminiscence z křemíkových nanokrystalů excitovaných ultrakrátkými pulsy
Author(s)	Žídek, K. (CZ) Trojánek, F. (CZ) Dzurňák, B. (CZ) Malý, P. (CZ) Pelant, Ivan (FZU-D)_{RID, ORCID, SAI}
Source Title	Physica E: Low-Dimensional Systems and Nanostructures. - : Elsevier - ISSN 1386-9477 Roč. 41, č. 6 (2009), 959-962
Number of pages	4 s.
Language	eng - English
Country	NL - Netherlands
Keywords	implanted silicon ; Auger recombination ; nonlinear luminescence
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)
	GA202/07/0818 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100521 - FZU-D (2005-2011)
UT WOS	000266675100017
DOI	10.1016/j.physe.2008.08.004
Annotation	We report on the spectral and dynamical properties of photoluminescence (PL) under ultrashort laser pulse excitation in Si nanocrystals prepared by Si+-ion implantation into a silica matrix. We concentrate on the luminescence properties that make it possible to distinguish several luminescence bands within a broad luminescence spectrum. In time-integrated luminescence, saturation-related changes suggest a presence of two different recombination channels connected to the nanocrystal volume states and the nanocrystal–SiO2 interface. The saturation of the luminescence can be explained in terms of Auger recombination. We investigated in detail fast sub-nanosecond luminescence, where significant differences were observed under UV excitation and for the excitation wavelengths in the visible part of the spectrum. We propose a rate-equations model based on the Auger and radiative/nonradiative recombination to interpret the experimental data.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2010

Number of the records: 1