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dc.contributor.authorAkhavan, S.en_US
dc.contributor.authorCihan, A. F.en_US
dc.contributor.authorBozok, B.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2015-07-28T12:03:19Z
dc.date.available2015-07-28T12:03:19Z
dc.date.issued2014-03-05en_US
dc.identifier.issn1613-6810
dc.identifier.urihttp://hdl.handle.net/11693/12833
dc.description.abstractHighly photosensitive nanocrystal (NC) skins based on exciton funneling are proposed and demonstrated using a graded bandgap profile across which no external bias is applied in operation for light-sensing. Four types of gradient NC skin devices (GNS) made of NC monolayers of distinct sizes with photovoltage readout are fabricated and comparatively studied. In all structures, polyelectrolyte polymers separating CdTe NC monolayers set the interparticle distances between the monolayers of ligand-free NCs to <1 nm. In this photosensitive GNS platform, excitons funnel along the gradually decreasing bandgap gradient of cascaded NC monolayers, and are finally captured by the NC monolayer with the smallest bandgap interfacing the metal electrode. Time-resolved measurements of the cascaded NC skins are conducted at the donor and acceptor wavelengths, and the exciton transfer process is confirmed in these active structures. These findings are expected to enable large-area GNS-based photosensing with highly efficient full-spectrum conversion.en_US
dc.language.isoEnglishen_US
dc.source.titleSmallen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/smll.201303808en_US
dc.subjectQuantum-dot Photodetectorsen_US
dc.subjectSemiconductor Nanocrystalsen_US
dc.subjectCdte Nanocrystalsen_US
dc.subjectSolar-cellsen_US
dc.titleNanocrystal skins with exciton funneling for photosensingen_US
dc.typeArticleen_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.citation.spage2470en_US
dc.citation.epage2475en_US
dc.citation.volumeNumber10en_US
dc.citation.issueNumber12en_US
dc.identifier.doi10.1002/smll.201303808en_US
dc.publisherWiley-VCH Verlagen_US
dc.contributor.bilkentauthorDemir, Hilmi Volkan
dc.identifier.eissn1613-6829
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112Xen_US


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