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Journal Article

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


Gong,  J.
Max Planck Society;


Huisken,  F.
Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Ledoux, G., Gong, J., Huisken, F., Guillois, O., & Reynaud, C. (2002). Photoluminescence of size-separated silicon nanocrystals: Confirmation of quantum confinement. Applied Physics Letters, 80(25), 4834-4836.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-1777-D
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. (C) 2002 American Institute of Physics.