IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v9y2018i1d10.1038_s41467-018-06596-1.html
   My bibliography  Save this article

Low threshold and efficient multiple exciton generation in halide perovskite nanocrystals

Author

Listed:
  • Mingjie Li

    (Nanyang Technological University)

  • Raihana Begum

    (Energy Research Institute @ NTU (ERI@N))

  • Jianhui Fu

    (Nanyang Technological University)

  • Qiang Xu

    (Nanyang Technological University)

  • Teck Ming Koh

    (Energy Research Institute @ NTU (ERI@N))

  • Sjoerd A. Veldhuis

    (Energy Research Institute @ NTU (ERI@N))

  • Michael Grätzel

    (Swiss Federal Institute of Technology)

  • Nripan Mathews

    (Energy Research Institute @ NTU (ERI@N)
    Nanyang Technological University)

  • Subodh Mhaisalkar

    (Energy Research Institute @ NTU (ERI@N)
    Nanyang Technological University)

  • Tze Chien Sum

    (Nanyang Technological University)

Abstract

Multiple exciton generation (MEG) or carrier multiplication, a process that spawns two or more electron–hole pairs from an absorbed high-energy photon (larger than two times bandgap energy Eg), is a promising way to augment the photocurrent and overcome the Shockley–Queisser limit. Conventional semiconductor nanocrystals, the forerunners, face severe challenges from fast hot-carrier cooling. Perovskite nanocrystals possess an intrinsic phonon bottleneck that prolongs slow hot-carrier cooling, transcending these limitations. Herein, we demonstrate enhanced MEG with 2.25Eg threshold and 75% slope efficiency in intermediate-confined colloidal formamidinium lead iodide nanocrystals, surpassing those in strongly confined lead sulfide or lead selenide incumbents. Efficient MEG occurs via inverse Auger process within 90 fs, afforded by the slow cooling of energetic hot carriers. These nanocrystals circumvent the conundrum over enhanced Coulombic coupling and reduced density of states in strongly confined nanocrystals. These insights may lead to the realization of next generation of solar cells and efficient optoelectronic devices.

Suggested Citation

  • Mingjie Li & Raihana Begum & Jianhui Fu & Qiang Xu & Teck Ming Koh & Sjoerd A. Veldhuis & Michael Grätzel & Nripan Mathews & Subodh Mhaisalkar & Tze Chien Sum, 2018. "Low threshold and efficient multiple exciton generation in halide perovskite nanocrystals," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06596-1
    DOI: 10.1038/s41467-018-06596-1
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-018-06596-1
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-018-06596-1?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
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Daniele Catone & Giuseppe Ammirati & Patrick O’Keeffe & Faustino Martelli & Lorenzo Di Mario & Stefano Turchini & Alessandra Paladini & Francesco Toschi & Antonio Agresti & Sara Pescetelli & Aldo Di C, 2021. "Effects of Crystal Morphology on the Hot-Carrier Dynamics in Mixed-Cation Hybrid Lead Halide Perovskites," Energies, MDPI, vol. 14(3), pages 1-14, January.

    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:9:y:2018:i:1:d:10.1038_s41467-018-06596-1. 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.