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      Near-unity emitting copper-doped colloidal semiconductor quantum wells for luminescent solar concentrators

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      Embargo Lift Date: 2018-08-11
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      Author(s)
      Sharma, M.
      Gungor K.
      Yeltik A.
      Olutas M.
      Guzelturk, B.
      Kelestemur Y.
      Erdem, T.
      Delikanli S.
      McBride, J. R.
      Demir, Hilmi Volkan
      Date
      2017
      Source Title
      Advanced Materials
      Print ISSN
      0935-9648
      Publisher
      Wiley-VCH Verlag
      Volume
      29
      Issue
      30
      Pages
      1 - 10
      Language
      English
      Type
      Article
      Item Usage Stats
      189
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      262
      downloads
      Abstract
      Doping of bulk semiconductors has revealed widespread success in optoelectronic applications. In the past few decades, substantial effort has been engaged for doping at the nanoscale. Recently, doped colloidal quantum dots (CQDs) have been demonstrated to be promising materials for luminescent solar concentrators (LSCs) as they can be engineered for providing highly tunable and Stokes-shifted emission in the solar spectrum. However, existing doped CQDs that are aimed for full solar spectrum LSCs suffer from moderately low quantum efficiency, intrinsically small absorption cross-section, and gradually increasing absorption profiles coinciding with the emission spectrum, which together fundamentally limit their effective usage. Here, the authors show the first account of copper doping into atomically flat colloidal quantum wells (CQWs). In addition to Stokes-shifted and tunable dopant-induced photoluminescence emission, the copper doping into CQWs enables near-unity quantum efficiencies (up to ≈97%), accompanied by substantially high absorption cross-section and inherently step-like absorption profile, compared to those of the doped CQDs. Based on these exceptional properties, the authors have demonstrated by both experimental analysis and numerical modeling that these newly synthesized doped CQWs are excellent candidates for LSCs. These findings may open new directions for deployment of doped CQWs in LSCs for advanced solar light harvesting technologies.
      Keywords
      2D semiconductor nanoplatelets
      Copper doping
      Luminescent solar concentrators
      Nucleation doping
      Quantum efficiency
      Absorption spectroscopy
      Copper
      Doping (additives)
      Efficiency
      Emission spectroscopy
      Flowcharting
      Luminescence
      Semiconductor doping
      Semiconductor quantum dots
      Semiconductor quantum wells
      Solar concentrators
      Solar radiation
      Absorption cross sections
      Colloidal quantum wells
      Permalink
      http://hdl.handle.net/11693/36424
      Published Version (Please cite this version)
      http://dx.doi.org/10.1002/adma.201700821
      Collections
      • Department of Electrical and Electronics Engineering 3702
      • Department of Physics 2397
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
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