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Ultrasmall Nanoplatelets: The Ultimate Tuning of Optoelectronic Properties
INRS-EMT, Varennes, QC.
INRS Quebec University 1650 Boulevard Lionel-Boulet Varennes .
Dipartimento di Fisica, Politecnico di Milano.
Dipartimento di Fisica, Politecnico di Milano.
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2017 (English)In: Advanced Energy Materials, ISSN 1614-6832, Vol. 7, no 17, 1602728Article in journal (Refereed) Published
Abstract [en]

2D semiconducting nanoplatelets (NPLs) are an emerging class of photoactive materials. They can be used as building blocks in optoelectronic devices thanks to their large absorption coefficient, high carrier mobility, and unique thickness-dependent optical transitions. The main drawback of NPLs is their large lateral size, which results in unfavorable band energy levels and low quantum yield (QY). Here, ultrasmall lead chalcogenide PbSe1- xSx NPLs are prepared, which exhibit an unprecedented QY of ≈60%, the highest ever reported for this structure. The NPLs are applied as light absorber in a photoelectrochemical system, leading to a saturated photocurrent density of ≈5.0 mA cm-2 (44 mL cm-2 d-1), which is a record for NPL-based photoelectrodes in solar-driven hydrogen generation. Ultrasmall NPLs hold the potential for breakthrough developments in the field of optically active nanomaterials

Place, publisher, year, edition, pages
John Wiley & Sons, 2017. Vol. 7, no 17, 1602728
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Experimental physics
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URN: urn:nbn:se:ltu:diva-63547DOI: 10.1002/aenm.201602728ISI: 000409410000006OAI: oai:DiVA.org:ltu-63547DiVA: diva2:1098801
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Validerad;2017;Nivå 2;2017-09-12 (andbra)

Available from: 2017-05-26 Created: 2017-05-26 Last updated: 2017-11-24Bibliographically approved

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Vomiero, Alberto

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