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The critical role of composition-dependent intragrain planar defects in the performance of MA1–xFAxPbI3 perovskite solar cells

Author

Listed:
  • Wei Li

    (Wuhan University of Technology
    Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory)

  • Mathias Uller Rothmann

    (Monash University)

  • Ye Zhu

    (The Hong Kong Polytechnic University)

  • Weijian Chen

    (Swinburne University of Technology)

  • Chenquan Yang

    (Wuhan University of Technology)

  • Yongbo Yuan

    (Central South University)

  • Yen Yee Choo

    (Monash University)

  • Xiaoming Wen

    (Swinburne University of Technology)

  • Yi-Bing Cheng

    (Wuhan University of Technology
    Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory)

  • Udo Bach

    (Monash University
    Monash University
    Commonwealth Scientific and Industrial Research Organization
    Melbourne Centre for Nanofabrication)

  • Joanne Etheridge

    (Monash University
    Monash University)

Abstract

Perovskite solar cells show excellent power conversion efficiencies, long carrier diffusion lengths and low recombination rates. This encourages a view that intragrain defects are electronically benign with little impact on device performance. In this study we varied the methylammonium (MA)/formamidinium (FA) composition in MA1–xFAxPbI3 (x = 0–1), and compared the structure and density of the intragrain planar defects with device performance, otherwise keeping the device nominally the same. We found that charge carrier lifetime, open-circuit voltage deficit and current density–voltage hysteresis correlate empirically with the density and structure of {111}c planar defects (x = 0.5–1) and {112}t twin boundaries (x = 0–0.1). The best performance parameters were found when essentially no intragrain planar defects were evident (x = 0.2). Similarly, reducing the density of {111}c planar defects through MASCN vapour treatment of FAPbI3 (x ≈ 1) also improved performance. These observations suggest that intragrain defect control can provide an important route for improving perovskite solar cell performance, in addition to well-established parameters such as grain boundaries and interfaces.

Suggested Citation

  • Wei Li & Mathias Uller Rothmann & Ye Zhu & Weijian Chen & Chenquan Yang & Yongbo Yuan & Yen Yee Choo & Xiaoming Wen & Yi-Bing Cheng & Udo Bach & Joanne Etheridge, 2021. "The critical role of composition-dependent intragrain planar defects in the performance of MA1–xFAxPbI3 perovskite solar cells," Nature Energy, Nature, vol. 6(6), pages 624-632, June.
    • Handle: RePEc:nat:natene:v:6:y:2021:i:6:d:10.1038_s41560-021-00830-9
    DOI: 10.1038/s41560-021-00830-9
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    Cited by:

    1. Songhua Cai & Zhipeng Li & Yalan Zhang & Tanghao Liu & Peng Wang & Ming-Gang Ju & Shuping Pang & Shu Ping Lau & Xiao Cheng Zeng & Yuanyuan Zhou, 2024. "Intragrain impurity annihilation for highly efficient and stable perovskite solar cells," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Jun Nishida & Peter T. S. Chang & Jiselle Y. Ye & Prachi Sharma & Dylan M. Wharton & Samuel C. Johnson & Sean E. Shaheen & Markus B. Raschke, 2022. "Nanoscale heterogeneity of ultrafast many-body carrier dynamics in triple cation perovskites," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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