Carrier Cooling in Colloidal Quantum Wells

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dc.contributor.authorPelton, Matthew
dc.contributor.authorIthurria, Sandrine
dc.contributor.authorSchaller, Richard D.
dc.contributor.authorDolzhnikov, Dmitriy S.
dc.contributor.authorTalapin, Dmitri V.
dc.date.accessioned2023-08-11T20:44:44Z
dc.date.available2023-08-11T20:44:44Z
dc.date.issued2012-11-08
dc.description.abstractIt has recently become possible to chemically synthesize atomically flat semiconductor nanoplatelets with monolayer-precision control over the platelet thickness. It has been suggested that these platelets are quantum wells; that is, carriers in these platelets are confined in one dimension but are free to move in the other two dimensions. Here, we report time-resolved photoluminescence and transient-absorption measurements of carrier relaxation that confirm the quantum-well nature of these nanomaterials. Excitation of the nanoplatelets by an intense laser pulse results in the formation of a high-temperature carrier population that cools back down to ambient temperature on the time scale of several picoseconds. The rapid carrier cooling indicates that the platelets are well-suited for optoelectronic applications such as lasers and modulators.en
dc.description.sponsorshipThis work was performed, in part, at the Center for Nanoscale Materials, a U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences User Facility under Contract No. DE-AC02-06CH11357. R.D.S. and D.V.T. acknowledge support by the University of Chicago and the Department of Energy Contract No. DE.AC02-06CH11357 awarded to UChicago Argonne, LLC, operator of Argonne National Laboratory. D.V.T. also thanks the David and Lucile Packard Foundation and Keck Foundation for their generous support. This work used facilities supported by NSF MRSEC Program under Award Number DMR-0213745.en
dc.description.urihttps://pubs.acs.org/doi/10.1021/nl302986yen
dc.format.extent6 pagesen
dc.genrejournal articlesen
dc.identifierdoi:10.13016/m2uzcx-jf0d
dc.identifier.citationPelton, Matthew, Sandrine Ithurria, Richard D. Schaller, Dmitriy S. Dolzhnikov, and Dmitri V. Talapin. “Carrier Cooling in Colloidal Quantum Wells.” Nano Letters 12, no. 12 (December 12, 2012): 6158–63. https://doi.org/10.1021/nl302986y.en
dc.identifier.urihttps://doi.org/10.1021/nl302986y
dc.identifier.urihttp://hdl.handle.net/11603/29184
dc.language.isoenen
dc.publisherACSen
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.rightsPublic Domain Mark 1.0*
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleCarrier Cooling in Colloidal Quantum Wellsen
dc.typeTexten
dcterms.creatorhttps://orcid.org/0000-0002-6370-8765en

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