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Article Dans Une Revue Applied Physics Letters Année : 2002

Photoluminescence of size-separated silicon nanocrystals : Confirmation of quantum confinement

Résumé

Silicon nanocrystals with diameters between 2.5 and 8 nm were prepared by pulsed CO2 laser pyrolysis of silane in a gas flow reactor and expanded through a conical nozzle into a high vacuum. Using a fast-spinning molecular-beam chopper, they were size-selectively deposited on dedicated quartz substrates. Finally, the photoluminescence of the silicon nanocrystals and their yield were measured as a function of their size. It was found that the photoluminescence follows very closely the quantum-confinement model. The yield shows a pronounced maximum for sizes between 3 and 4 nm.
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hal-00144452 , version 1 (03-05-2007)

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G. Ledoux, J. Gong, F. Huisken, O. Guillois, C. Reynaud. Photoluminescence of size-separated silicon nanocrystals : Confirmation of quantum confinement. Applied Physics Letters, 2002, 80 (25), pp.4834-4836. ⟨10.1063/1.1485302⟩. ⟨hal-00144452⟩
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