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dc.contributor.authorChoi, Joshua J.
dc.contributor.authorLuria, Justin
dc.contributor.authorHyun, Byung-Ryool
dc.contributor.authorBartnik, Adam C.
dc.contributor.authorSun, Liangfeng
dc.contributor.authorLim, Yee-Fun
dc.contributor.authorMarohn, John A.
dc.contributor.authorWise, Frank W.
dc.contributor.authorHanrath, Tobias
dc.date.accessioned2016-02-25T13:54:29Z
dc.date.available2016-02-25T13:54:29Z
dc.date.issued2010-05-12
dc.identifier.citationChoi JJ, Luria J, Hyun B-R, Bartnik AC, Sun L, et al. (2010) Photogenerated Exciton Dissociation in Highly Coupled Lead Salt Nanocrystal Assemblies. Nano Lett 10: 1805–1811. Available: http://dx.doi.org/10.1021/nl100498e.
dc.identifier.issn1530-6984
dc.identifier.issn1530-6992
dc.identifier.pmid20420458
dc.identifier.doi10.1021/nl100498e
dc.identifier.urihttp://hdl.handle.net/10754/599185
dc.description.abstractInternanocrystal coupling induced excitons dissociation in lead salt nanocrystal assemblies is investigated. By combining transient photoluminescence spectroscopy, grazing incidence small-angle X-ray scattering, and time-resolved electric force microscopy, we show that excitons can dissociate, without the aid of an external bias or chemical potential gradient, via tunneling through a potential barrier when the coupling energy is comparable to the exciton binding energy. Our results have important implications for the design of nanocrystal-based optoelectronic devices. © 2010 American Chemical Society.
dc.description.sponsorshipThis work was supported by the Cornell Center for Materials Research SEED fund and KAUST-CU Center for Energy and Sustainability. GISAXS measurements were conducted at Cornell High Energy Synchrotron Source (CHESS), and we thank Detlef-M. Smilgies and Kaifu Bian for their help with these measurements. Devices were fabricated in the Cornell Nanofabrication Facility (CNF) which is funded by NSF. DFT calculations were done on the Intel Cluster at the Cornell Nanoscale Facility, part of the National Nanotechnology Infrastructure Network (NNIN) funded by the NSF. J.J.C. acknowledges support from NSF IGERT fellowship. J.L. and J.A.M. acknowledge support from NSF. Y.F.L. acknowledges a fellowship from the Agency of Science, Technology and Research (A*STAR), Singapore. L.S. acknowledges support from NYSTAR.
dc.publisherAmerican Chemical Society (ACS)
dc.subjectElectric force microscopy
dc.subjectExciton dissociation
dc.subjectInternanocrystal coupling
dc.subjectNanocrystals
dc.titlePhotogenerated Exciton Dissociation in Highly Coupled Lead Salt Nanocrystal Assemblies
dc.typeArticle
dc.identifier.journalNano Letters
dc.contributor.institutionCornell University, Ithaca, United States
dc.contributor.institutionSchool of Chemical and Biomolecular Engineering, , Australia


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