Plasmonic nanoparticle enhanced and extended performance of light-sensitive nanocrystal skins

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buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage73en_US
dc.citation.spage68en_US
dc.citation.volumeNumber1509en_US
dc.contributor.authorAkhavan, Shahaben_US
dc.contributor.authorGüngör, Kıvançen_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.coverage.spatialBoston, MA; United Statesen_US
dc.date.accessioned2016-02-08T12:09:02Z
dc.date.available2016-02-08T12:09:02Z
dc.date.issued2013en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.descriptionDate of Conference: 25 November 2012 - 30 November 2012en_US
dc.descriptionConference Name: 2012 Materials Research Society Fall Meetingen_US
dc.description.abstractWe report on light-sensitive nanocrystal skin (LS-NS) platforms composed of monolayer visible nanocrystals (NCs) on top of bilayers of polyelectrolyte polymers. These LS-NS devices are operated on the principle of photogenerated potential buildup, unlike common photodetectors that operate on the basis of charge collection. The resulting devices are as highly sensitive as common photosensors, despite utilizing a monolayer of NCs and requiring no applied external bias. In this device architecture, using only a single NC monolayer also allows to reduce noise current generation. This LS-NS platform is highly stable under ambient conditions with fully sealed NC monolayer, promising for low-cost large-area UV/visible sensing applications. However, such visible NC based LS-NS devices exhibit limited performance in the long wavelength range due to the low optical absorption of these NCs (e.g., CdTe NCs) in this spectral range. Here, to enhance the device sensitivity, incorporating silver nanoparticles into LS-NS is proposed and demonstrated. For that, the optical absorption of CdTe monolayer NCs in the LS-NS devices is increased using the embedded silver nanostructures. With plasmon coupling, we observe a 2.6-fold enhancement factor in the photosensitivity around the localized surface plasmonic resonance peak of the nanostructures. Higher sensitivity improvement is also obtained at longer wavelengths. To predict the enhancement in the sensitivity of the LS-NS, numerical simulations are performed and the simulation results are found to agree well with the experimental data. Plasmonically enhanced LS-NS hold great promise for large-area photosensing applications extending from UV to IR including windows and facades of smart buildings.en_US
dc.identifier.doi10.1557/opl.2013.547en_US
dc.identifier.issn0272-9172
dc.identifier.urihttp://hdl.handle.net/11693/28034
dc.language.isoEnglishen_US
dc.publisherMaterials Research Societyen_US
dc.relation.isversionofhttps://doi.org/10.1557/opl.2013.547en_US
dc.source.titleMaterials Research Society Symposium Proceedingsen_US
dc.subjectOptoelectronicen_US
dc.subjectNanostructureen_US
dc.subjectSelf-assemblyen_US
dc.titlePlasmonic nanoparticle enhanced and extended performance of light-sensitive nanocrystal skinsen_US
dc.typeConference Paperen_US
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Institute of Materials Science and Nanotechnology (UNAM)
Department of Electrical and Electronics Engineering
Department of Physics