IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v10y2019i1d10.1038_s41467-019-08425-5.html
   My bibliography  Save this article

Trifluoroacetate induced small-grained CsPbBr3 perovskite films result in efficient and stable light-emitting devices

Author

Listed:
  • Haoran Wang

    (Shanghai University)

  • Xiaoyu Zhang

    (Jilin University
    City University of Hong Kong)

  • Qianqian Wu

    (Shanghai University)

  • Fan Cao

    (Shanghai University)

  • Dongwen Yang

    (Jilin University
    Zhengzhou University)

  • Yuequn Shang

    (ShanghaiTech University)

  • Zhijun Ning

    (ShanghaiTech University)

  • Wei Zhang

    (Jilin University)

  • Weitao Zheng

    (Jilin University)

  • Yanfa Yan

    (The University of Toledo)

  • Stephen V. Kershaw

    (City University of Hong Kong)

  • Lijun Zhang

    (Jilin University)

  • Andrey L. Rogach

    (City University of Hong Kong
    School of Materials Science and Engineering)

  • Xuyong Yang

    (Shanghai University)

Abstract

Quantum efficiencies of organic-inorganic hybrid lead halide perovskite light-emitting devices (LEDs) have increased significantly, but poor device operational stability still impedes their further development and application. All-inorganic perovskites show better stability than the hybrid counterparts, but the performance of their respective films used in LEDs is limited by the large perovskite grain sizes, which lowers the radiative recombination probability and results in grain boundary related trap states. We realize smooth and pinhole-free, small-grained inorganic perovskite films with improved photoluminescence quantum yield by introducing trifluoroacetate anions to effectively passivate surface defects and control the crystal growth. As a result, efficient green LEDs based on inorganic perovskite films achieve a high current efficiency of 32.0 cd A−1 corresponding to an external quantum efficiency of 10.5%. More importantly, our all-inorganic perovskite LEDs demonstrate a record operational lifetime, with a half-lifetime of over 250 h at an initial luminance of 100 cd m−2.

Suggested Citation

  • Haoran Wang & Xiaoyu Zhang & Qianqian Wu & Fan Cao & Dongwen Yang & Yuequn Shang & Zhijun Ning & Wei Zhang & Weitao Zheng & Yanfa Yan & Stephen V. Kershaw & Lijun Zhang & Andrey L. Rogach & Xuyong Yan, 2019. "Trifluoroacetate induced small-grained CsPbBr3 perovskite films result in efficient and stable light-emitting devices," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08425-5
    DOI: 10.1038/s41467-019-08425-5
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-019-08425-5
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-019-08425-5?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:10:y:2019:i:1:d:10.1038_s41467-019-08425-5. 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.