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The optoelectronic role of chlorine in CH3NH3PbI3(Cl)-based perovskite solar cells

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Listed:
  • Qi Chen

    (University of California
    California NanoSystems Institute, University of California)

  • Huanping Zhou

    (University of California
    California NanoSystems Institute, University of California)

  • Yihao Fang

    (University of California
    California NanoSystems Institute, University of California)

  • Adam Z. Stieg

    (California NanoSystems Institute, University of California
    WPI Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science)

  • Tze-Bin Song

    (University of California
    California NanoSystems Institute, University of California)

  • Hsin-Hua Wang

    (University of California
    California NanoSystems Institute, University of California)

  • Xiaobao Xu

    (University of California
    California NanoSystems Institute, University of California)

  • Yongsheng Liu

    (University of California
    California NanoSystems Institute, University of California)

  • Shirong Lu

    (University of California
    California NanoSystems Institute, University of California)

  • Jingbi You

    (University of California)

  • Pengyu Sun

    (University of California)

  • Jeff McKay

    (University of California)

  • Mark S. Goorsky

    (University of California)

  • Yang Yang

    (University of California
    California NanoSystems Institute, University of California)

Abstract

Perovskite photovoltaics offer a compelling combination of extremely low-cost, ease of processing and high device performance. The optoelectronic properties of the prototypical CH3NH3PbI3 can be further adjusted by introducing other extrinsic ions. Specifically, chlorine incorporation has been shown to affect the morphological development of perovksite films, which results in improved optoelectronic characteristics for high efficiency. However, it requires a deep understanding to the role of extrinsic halide, especially in the absence of unpredictable morphological influence during film growth. Here we report an effective strategy to investigate the role of the extrinsic ion in the context of optoelectronic properties, in which the morphological factors that closely correlate to device performance are mostly decoupled. The chlorine incorporation is found to mainly improve the carrier transport across the heterojunction interfaces, rather than within the perovskite crystals. Further optimization according this protocol leads to solar cells achieving power conversion efficiency of 17.91%.

Suggested Citation

  • Qi Chen & Huanping Zhou & Yihao Fang & Adam Z. Stieg & Tze-Bin Song & Hsin-Hua Wang & Xiaobao Xu & Yongsheng Liu & Shirong Lu & Jingbi You & Pengyu Sun & Jeff McKay & Mark S. Goorsky & Yang Yang, 2015. "The optoelectronic role of chlorine in CH3NH3PbI3(Cl)-based perovskite solar cells," Nature Communications, Nature, vol. 6(1), pages 1-9, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8269
    DOI: 10.1038/ncomms8269
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