Efficient Multiple Exciton Generation Observed in Colloidal PbSe Quantum Dots with Temporally and Spectrally Resolved Intraband Excitation

Handle URI:
http://hdl.handle.net/10754/598110
Title:
Efficient Multiple Exciton Generation Observed in Colloidal PbSe Quantum Dots with Temporally and Spectrally Resolved Intraband Excitation
Authors:
Ji, Minbiao; Park, Sungnam; Connor, Stephen T.; Mokari, Taleb; Cui, Yi; Gaffney, Kelly J.
Abstract:
We have spectrally resolved the intraband transient absorption of photogenerated excitons to quantify the exciton population dynamics in colloidal PbSe quantum dots (QDs). These measurements demonstrate that the spectral distribution, as well as the amplitude, of the transient spectrum depends on the number of excitons excited in a QD. To accurately quantify the average number of excitons per QD, the transient spectrum must be spectrally integrated. With spectral integration, we observe efficient multiple exciton generation In colloidal PbSe QDs. © 2009 American Chemical Society.
Citation:
Ji M, Park S, Connor ST, Mokari T, Cui Y, et al. (2009) Efficient Multiple Exciton Generation Observed in Colloidal PbSe Quantum Dots with Temporally and Spectrally Resolved Intraband Excitation. Nano Lett 9: 1217–1222. Available: http://dx.doi.org/10.1021/nl900103f.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
Issue Date:
11-Mar-2009
DOI:
10.1021/nl900103f
PubMed ID:
19226125
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
The work has been supported by the Global Climate and Energy Project (GCEP) at Stanford University, the King Abdullah University of Science and Technology (KAUST): Global Research Partnership (GRP) through the Center for Advanced Molecular Photovoltaics (CAMP), and the Department of Energy. S.T.C. acknowledges the support from a National Science Foundation Graduate Fellowship. Work at the Molecular Foundry was supported by the Director, Office of Science, Office of Basic Energy Science, Division of Materials Science and Engineering, U.S. Department of Energy, under contract DE-AC0205CHII231.
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Full metadata record

DC FieldValue Language
dc.contributor.authorJi, Minbiaoen
dc.contributor.authorPark, Sungnamen
dc.contributor.authorConnor, Stephen T.en
dc.contributor.authorMokari, Taleben
dc.contributor.authorCui, Yien
dc.contributor.authorGaffney, Kelly J.en
dc.date.accessioned2016-02-25T13:12:52Zen
dc.date.available2016-02-25T13:12:52Zen
dc.date.issued2009-03-11en
dc.identifier.citationJi M, Park S, Connor ST, Mokari T, Cui Y, et al. (2009) Efficient Multiple Exciton Generation Observed in Colloidal PbSe Quantum Dots with Temporally and Spectrally Resolved Intraband Excitation. Nano Lett 9: 1217–1222. Available: http://dx.doi.org/10.1021/nl900103f.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.pmid19226125en
dc.identifier.doi10.1021/nl900103fen
dc.identifier.urihttp://hdl.handle.net/10754/598110en
dc.description.abstractWe have spectrally resolved the intraband transient absorption of photogenerated excitons to quantify the exciton population dynamics in colloidal PbSe quantum dots (QDs). These measurements demonstrate that the spectral distribution, as well as the amplitude, of the transient spectrum depends on the number of excitons excited in a QD. To accurately quantify the average number of excitons per QD, the transient spectrum must be spectrally integrated. With spectral integration, we observe efficient multiple exciton generation In colloidal PbSe QDs. © 2009 American Chemical Society.en
dc.description.sponsorshipThe work has been supported by the Global Climate and Energy Project (GCEP) at Stanford University, the King Abdullah University of Science and Technology (KAUST): Global Research Partnership (GRP) through the Center for Advanced Molecular Photovoltaics (CAMP), and the Department of Energy. S.T.C. acknowledges the support from a National Science Foundation Graduate Fellowship. Work at the Molecular Foundry was supported by the Director, Office of Science, Office of Basic Energy Science, Division of Materials Science and Engineering, U.S. Department of Energy, under contract DE-AC0205CHII231.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleEfficient Multiple Exciton Generation Observed in Colloidal PbSe Quantum Dots with Temporally and Spectrally Resolved Intraband Excitationen
dc.typeArticleen
dc.identifier.journalNano Lettersen
dc.contributor.institutionStanford Linear Accelerator Center, Menlo Park, United Statesen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
dc.contributor.institutionLawrence Berkeley National Laboratory, Berkeley, United Statesen
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)en

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