Direct bandgap optical transitions in Si nanocrystals

Prokofiev, AA; Moskalenko, AS; Yassievich, IN; de Boer, WDAM; Timmerman, D; Zhang, H; Buma, WJ; Gregorkiewicz, T

Direct bandgap optical transitions in Si nanocrystals

Prokofiev, AA Moskalenko, AS Yassievich, IN de Boer, WDAM Timmerman, D Zhang, H Buma, WJ Gregorkiewicz, T

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Publication Type:: Journal Article
Citation:: JETP Letters, 2010, 90 (12), pp. 758 - 762
Issue Date:: 2010-03-01

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Field	Value	Language
dc.contributor.author	Prokofiev, AA	en_US
dc.contributor.author	Moskalenko, AS	en_US
dc.contributor.author	Yassievich, IN	en_US
dc.contributor.author	de Boer, WDAM	en_US
dc.contributor.author	Timmerman, D	en_US
dc.contributor.author	Zhang, H	en_US
dc.contributor.author	Buma, WJ	en_US
dc.contributor.author	Gregorkiewicz, T	en_US
dc.date.issued	2010-03-01	en_US
dc.identifier.citation	JETP Letters, 2010, 90 (12), pp. 758 - 762	en_US
dc.identifier.issn	0021-3640	en_US
dc.identifier.uri	http://hdl.handle.net/10453/34510
dc.description.abstract	The effect of quantum confinement on the direct bandgap of spherical Si nanocrystals has been modelled theoretically. We conclude that the energy of the direct bandgap at the Γ-point decreases with size reduction: quantum confinement enhances radiative recombination across the direct bandgap and introduces its "red" shift for smaller grains. We postulate to identify the frequently reported efficient blue emission (F-band) from Si nanocrystals with this zero-phonon recombination. In a dedicated experiment, we confirm the "red" shift of the F-band, supporting the proposed identification. © 2009 Pleiades Publishing, Ltd.	en_US
dc.relation.ispartof	JETP Letters	en_US
dc.relation.isbasedon	10.1134/S0021364009240059	en_US
dc.subject.classification	General Physics	en_US
dc.title	Direct bandgap optical transitions in Si nanocrystals	en_US
dc.type	Journal Article
utslib.citation.volume	12	en_US
utslib.citation.volume	90	en_US
utslib.for	01 Mathematical Sciences	en_US
utslib.for	02 Physical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	12	en_US
pubs.publication-status	Published	en_US
pubs.volume	90	en_US

Abstract:

The effect of quantum confinement on the direct bandgap of spherical Si nanocrystals has been modelled theoretically. We conclude that the energy of the direct bandgap at the Γ-point decreases with size reduction: quantum confinement enhances radiative recombination across the direct bandgap and introduces its "red" shift for smaller grains. We postulate to identify the frequently reported efficient blue emission (F-band) from Si nanocrystals with this zero-phonon recombination. In a dedicated experiment, we confirm the "red" shift of the F-band, supporting the proposed identification. © 2009 Pleiades Publishing, Ltd.

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http://hdl.handle.net/10453/34510