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Two-Dimensional Ruddlesden-Popper Perovskite with Nanorod-like Morphology for Solar Cells with Efficiency Exceeding 15.

Author information

Affiliations

  • 1. The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , People's Republic of China.
      Authors
    • Lai H 1
    • Kan B 1
    • Liu T 1
    • Zhou T 1
    • Wan X 1
    • Liu Y 1
    • Chen Y 1
    (7 authors)
  • 2. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices , South China University of Technology , Guangzhou 510640 , People's Republic of China.
      Authors
    • Zheng N 2
    • Xie Z 2
    • Xie Z 2
    (3 authors)
  • 3. Institute of Photoelectronic Thin Film Devices and Technology , Nankai University , Tianjin 300071 , People's Republic of China.
      Authors
    • Zhang X 3
    (1 author)

ORCIDs linked to this article

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Journal of the American Chemical Society, 10 Sep 2018, 140(37):11639-11646
https://doi.org/10.1021/jacs.8b04604 PMID: 30157626 

Abstract 

Two-dimensional (2D) Ruddlesden-Popper perovskites have shown great potential for application in perovskite solar cells due to their appealing environmental stability. However, 2D perovskites generally show poor photovoltaic performance. Here, a new type of 2D perovskite using 2-thiophenemethylammonium (ThMA+) as a spacer cation was developed and high photovoltaic performance as well as enhanced stability in comparison with its 3D counterpart was demonstrated. The use of the 2D perovskite (ThMA)2(MA) n-1Pb nI3 n+1 ( n = 3) in deposited highly oriented thin films from N, N-dimethylformamide using a methylammonium chloride (MACl) assisted film-forming technique dramatically improves the efficiency of 2D perovskite photovoltaic devices from 1.74% to over 15%, which is the highest efficiency for 2D perovskite ( n < 6) solar cells so far. The enhanced performance of the 2D perovskite devices using MACl as additive is ascribed to the growth of a dense web of nanorod-like film with near-single-crystalline quality, in which the crystallographic planes of the 2D MA n-1Pb nI3 n+12- slabs preferentially aligned perpendicular to the substrate, thus facilitating efficient charge transport. This work provides a new insight into exploration of the formation mechanism of 2D perovskites with increased crystallinity and crystal orientation suitable for high-performance solar cells.

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Read article at publisher's site: https://doi.org/10.1021/jacs.8b04604

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Funding 

Funders who supported this work.

Ministry of Science and Technology of the People&apos;s Republic of China (1)

National Natural Science Foundation of China (3)