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      Plasmonic light-sensitive skins of nanocrystal monolayers

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      Author
      Akhavan, S.
      Gungor, K.
      Mutlugun, E.
      Demir, Hilmi Volkan
      Date
      2013
      Source Title
      Nanotechnology
      Print ISSN
      0957-4484
      Publisher
      IOP Publishing
      Volume
      24
      Issue
      15
      Pages
      155201-1 - 155201-8
      Language
      English
      Type
      Article
      Item Usage Stats
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      128
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      Abstract
      We report plasmonically coupled light-sensitive skins of nanocrystal monolayers that exhibit sensitivity enhancement and spectral range extension with plasmonic nanostructures embedded in their photosensitive nanocrystal platforms. The deposited plasmonic silver nanoparticles of the device increase the optical absorption of a CdTe nanocrystal monolayer incorporated in the device. Controlled separation of these metallic nanoparticles in the vicinity of semiconductor nanocrystals enables optimization of the photovoltage buildup in the proposed nanostructure platform. The enhancement factor was found to depend on the excitation wavelength. We observed broadband sensitivity improvement (across 400-650 nm), with a 2.6-fold enhancement factor around the localized plasmon resonance peak. The simulation results were found to agree well with the experimental data. Such plasmonically enhanced nanocrystal skins hold great promise for large-area UV/visible sensing applications.
      Keywords
      Semiconductor Nanocrystals
      Solar-cells
      Broad-band
      Enhancement
      Devices
      Permalink
      http://hdl.handle.net/11693/10821
      Published Version (Please cite this version)
      http://dx.doi.org/10.1088/0957-4484/24/15/155201
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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