論文

査読有り
2019年3月13日

Passivation of Grain Boundary by Squaraine Zwitterions for Defect Passivation and Efficient Perovskite Solar Cells

ACS Applied Materials & Interfaces
  • Zhen Wang
  • ,
  • Anusha Pradhan
  • ,
  • Muhammad Akmal kamarudin
  • ,
  • Manish Pandey
  • ,
  • Shyam S. Pandey
  • ,
  • Putao Zhang
  • ,
  • Chi huey Ng
  • ,
  • Atul S.M. Tripathi
  • ,
  • Tingli Ma
  • ,
  • Shuzi Hayase

11
10
開始ページ
10012
終了ページ
10020
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acsami.8b22044
出版者・発行元
American Chemical Society ({ACS})

© 2019 American Chemical Society. Unavoidable defects in grain boundaries (GBs) are detrimental and critically influence the organometal halide perovskite performance and stability. To address this issue, semiconducting molecules have been employed to passivate traps along perovskite GBs. Here, we designed and synthesized three squaraine molecules (SQ) with zwitterionic structure to interact with under-coordinated Pb 2+ and passivate Pb-I antisite defects. Density functional theory calculation shows symmetric O atoms could coordinate with perovskite grains simultaneously, resulting in continuous charge distribution at the SQ-perovskite interface. The energetic traps distribution in CH 3 NH 3 PbI 3 perovskite is influenced significantly by the interaction between SQ and perovskite as analyzed by thermally stimulated current, in which the deep-level defects are considerably reduced due to efficient SQ passivation. In addition, we explore how SQ molecules with different energy offset affect the charge extraction, which is suggested to facilitate exciton separation at the perovskite-SQ interface. These benefits lead to enhanced perovskite efficiency from 15.77 to 18.83% with the fill factor approaching 80%, which is among the highest efficiency reported for MAPbI 3 solar cells fabricated in an ambient environment at 60% relative humidity (RH). Considerable retardation of perovskite device degradation was achieved, retaining 90% of initial efficiency when kept 600 h at 60 ± 5% RH.

リンク情報
DOI
https://doi.org/10.1021/acsami.8b22044
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/30775904
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85062560140&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85062560140&origin=inward
ID情報
  • DOI : 10.1021/acsami.8b22044
  • ISSN : 1944-8244
  • eISSN : 1944-8252
  • ORCIDのPut Code : 54677210
  • PubMed ID : 30775904
  • SCOPUS ID : 85062560140

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