Abstract
In this article, we report on the room-temperature pulsed laser deposition (PLD) of lead sulfide (PbS) nanoparticles (NPs) layers onto various substrates. It is particularly shown that the average size of PbS NPs can be controlled by varying the number of laser ablation pulses. The pulsed laser deposited PbS NPs are found to be of high-crystalline quality and their photoluminescence (PL) to blue shift significantly from 1420 to 880 nm, as their average diameter is decreased from 8.5 to 2.5 nm, thereby confirming the quantum size effect. The latitude of our PLD process is shown to permit the achievement of multilayered PbS-NPs structures of which the overall PL emission spectrum can be tailored through the appropriate stack of individual PbS-NPs layers.
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Acknowledgments
The authors would like to acknowledge the financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) and from the Sixtron advanced Materials, in the context of a CRD-NSERC Grant (CRDPJ 379634-08). The authors also acknowledge the support of the “Fonds Québécois de la Recherche sur la Nature et les Technologies” (FQRNT) through its strategic network “Plasma-Québec”.
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Ka, I., Ma, D. & El Khakani, M.A. Tailoring the photoluminescence of PbS-nanoparticles layers deposited by means of the pulsed laser ablation technique. J Nanopart Res 13, 2269–2274 (2011). https://doi.org/10.1007/s11051-011-0401-4
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DOI: https://doi.org/10.1007/s11051-011-0401-4