|
Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2009, Volume 90, Issue 12, Pages 856–860
(Mi jetpl609)
|
|
|
|
This article is cited in 71 scientific papers (total in 71 papers)
CONDENSED MATTER
Direct bandgap optical transitions in Si nanocrystals
A. A. Prokofieva, A. S. Moskalenkoab, I. N. Yassievicha, W. D. S. A. M. de Boerc, D. Timmermanc, Zhang Hongweid, W. J. Bumad, T. Gregorkiewiczc a Ioffe Physico-Technical Institute, Russian Academy of Sciences
b Institut für Physik, Martin-Luther-Universität, Halle-Wittenberg, Germany
c Van der Waals-Zeeman Institute, University of Amsterdam, The Netherlands
d Van't Hoff Institute for Molecular Sciences, University of Amsterdam, NL-1018 WS Amsterdam, The Netherlands
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 $\Gamma$-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.
Received: 09.11.2009
Citation:
A. A. Prokofiev, A. S. Moskalenko, I. N. Yassievich, W. D. S. A. M. de Boer, D. Timmerman, Zhang Hongwei, W. J. Buma, T. Gregorkiewicz, “Direct bandgap optical transitions in Si nanocrystals”, Pis'ma v Zh. Èksper. Teoret. Fiz., 90:12 (2009), 856–860; JETP Letters, 90:12 (2009), 758–762
Linking options:
https://www.mathnet.ru/eng/jetpl609 https://www.mathnet.ru/eng/jetpl/v90/i12/p856
|
Statistics & downloads: |
Abstract page: | 318 | Full-text PDF : | 106 | References: | 31 |
|