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Green synthesis of near infrared core/shell quantum dots for photocatalytic hydrogen production
Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Université du Québec, Varennes, Québec.
Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec .
Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Université du Québec, Varennes, Québec.
Department of Electrical and Computer Engineering, McGill University.
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Number of Authors: 10
2016 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 27, no 49, 495405Article in journal (Refereed) Published
Abstract [en]

Quantum dots (QDs) are attractive systems for potential applications in future solar energy technologies, due to their optical properties which are tunable as a function of size and composition. In this study, we synthesized PbS QDs with first excitonic peak in the range 1060 to 1300 nm using a PbCl2/sulfur molar ratio of 10:1. The first excitonic absorption peak from 1300 to 950 nm of the PbS/CdS core/shell QDs can be further synthesized via the cation exchange approach. Our method resulted in high quantum yield, good stability, monodisperse QD solutions with a full surface coverage by excess Cd cations. In addition, we used our core/shell QDs in a photoelectrochemical cell for hydrogen generation. This heterostructure exhibited a saturated photocurrent as high as 3.3 mA cm−2, leading to ~29 ml cm−2 d−1 hydrogen generation, indicating the strong potential of our core/shell QDs for applications in water splitting.

Place, publisher, year, edition, pages
2016. Vol. 27, no 49, 495405
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Other Physics Topics
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Experimental physics
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URN: urn:nbn:se:ltu:diva-60432DOI: 10.1088/0957-4484/27/49/495405ScopusID: 2-s2.0-84995555544OAI: oai:DiVA.org:ltu-60432DiVA: diva2:1046837
Note

Validerad; 2016; Nivå 2; 2016-11-15 (andbra)

Available from: 2016-11-15 Created: 2016-11-15 Last updated: 2016-12-02Bibliographically approved

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Vomiero, Alberto
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