IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v7y2016i1d10.1038_ncomms13178.html
   My bibliography  Save this article

Theory of highly efficient multiexciton generation in type-II nanorods

Author

Listed:
  • Hagai Eshet

    (School of Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University
    The Raymond and Beverly Sackler Center for Computational Molecular and Materials Science, Tel Aviv University)

  • Roi Baer

    (Fritz Haber Center for Molecular Dynamics, Institute of Chemistry, The Hebrew University of Jerusalem)

  • Daniel Neuhauser

    (University of California at Los Angeles)

  • Eran Rabani

    (The Raymond and Beverly Sackler Center for Computational Molecular and Materials Science, Tel Aviv University
    Lawrence Berkeley National Laboratory)

Abstract

Multiexciton generation, by which more than a single electron–hole pair is generated on optical excitation, is a promising paradigm for pushing the efficiency of solar cells beyond the Shockley–Queisser limit of 31%. Utilizing this paradigm, however, requires the onset energy of multiexciton generation to be close to twice the band gap energy and the efficiency to increase rapidly above this onset. This challenge remains unattainable even using confined nanocrystals, nanorods or nanowires. Here, we show how both goals can be achieved in a nanorod heterostructure with type-II band offsets. Using pseudopotential atomistic calculation on a model type-II semiconductor heterostructure we predict the optimal conditions for controlling multiexciton generation efficiencies at twice the band gap energy. For a finite band offset, this requires a sharp interface along with a reduction of the exciton cooling and may enable a route for breaking the Shockley–Queisser limit.

Suggested Citation

  • Hagai Eshet & Roi Baer & Daniel Neuhauser & Eran Rabani, 2016. "Theory of highly efficient multiexciton generation in type-II nanorods," Nature Communications, Nature, vol. 7(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13178
    DOI: 10.1038/ncomms13178
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/ncomms13178
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/ncomms13178?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13178. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.