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Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells

Author

Listed:
  • Yihua Chen

    (College of Engineering, Peking University)

  • Nengxu Li

    (College of Engineering, Peking University)

  • Ligang Wang

    (College of Engineering, Peking University)

  • Liang Li

    (College of Engineering, Peking University)

  • Ziqi Xu

    (College of Engineering, Peking University)

  • Haoyang Jiao

    (College of Engineering, Peking University)

  • Pengfei Liu

    (Beijing Institute of Technology)

  • Cheng Zhu

    (Beijing Institute of Technology)

  • Huachao Zai

    (Beijing Institute of Technology)

  • Mingzi Sun

    (Hong Kong Polytechnic University)

  • Wei Zou

    (Nanjing Tech University)

  • Shuai Zhang

    (National Center for Nanoscience and Technology)

  • Guichuan Xing

    (University of Macau)

  • Xinfeng Liu

    (National Center for Nanoscience and Technology)

  • Jianpu Wang

    (Nanjing Tech University)

  • Dongdong Li

    (Chinese Academy of Sciences)

  • Bolong Huang

    (Hong Kong Polytechnic University)

  • Qi Chen

    (Beijing Institute of Technology)

  • Huanping Zhou

    (College of Engineering, Peking University)

Abstract

Further minimizing the defect state density in the semiconducting absorber is vital to boost the power conversion efficiency of solar cells approaching Shockley-Queisser limit. However, it lacks a general strategy to control the precursor chemistry for defects density reduction in the family of iodine based perovskite. Here the alkaline environment in precursor solution is carefully investigated as an effective parameter to suppress the incident iodine and affects the crystallization kinetics during film fabrication, via rationale adjustment of the alkalinity of additives. Especially, a ‘residual free’ weak alkaline is proposed not only to shrink the bandgap of the absorber by modulating the stoichiometry of organic cation, but also to improve the open circuit voltage in the resultant device. Consequently, the certified efficiency of 20.87% (Newport) is achieved with one of the smallest voltage deficits of 413 mV in the planar heterojunction perovskite solar cell.

Suggested Citation

  • Yihua Chen & Nengxu Li & Ligang Wang & Liang Li & Ziqi Xu & Haoyang Jiao & Pengfei Liu & Cheng Zhu & Huachao Zai & Mingzi Sun & Wei Zou & Shuai Zhang & Guichuan Xing & Xinfeng Liu & Jianpu Wang & Dong, 2019. "Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09093-1
    DOI: 10.1038/s41467-019-09093-1
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    Cited by:

    1. Haodong Wu & Yuchen Hou & Jungjin Yoon & Abbey Marie Knoepfel & Luyao Zheng & Dong Yang & Ke Wang & Jin Qian & Shashank Priya & Kai Wang, 2024. "Down-selection of biomolecules to assemble “reverse micelle” with perovskites," Nature Communications, Nature, vol. 15(1), pages 1-14, December.

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