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Aspartate all-in-one doping strategy enables efficient all-perovskite tandems

Author

Listed:
  • Shun Zhou

    (Wuhan University)

  • Shiqiang Fu

    (Wuhan University)

  • Chen Wang

    (Wuhan University)

  • Weiwei Meng

    (Wuhan University)

  • Jin Zhou

    (Wuhan University)

  • Yuanrong Zou

    (Wuhan University)

  • Qingxian Lin

    (Wuhan University)

  • Lishuai Huang

    (Wuhan University)

  • Wenjun Zhang

    (Wuhan University)

  • Guojun Zeng

    (Wuhan University)

  • Dexin Pu

    (Wuhan University)

  • Hongling Guan

    (Wuhan University)

  • Cheng Wang

    (Wuhan University)

  • Kailian Dong

    (Wuhan University)

  • Hongsen Cui

    (Wuhan University)

  • Shuxin Wang

    (Wuhan University)

  • Ti Wang

    (Wuhan University)

  • Guojia Fang

    (Wuhan University)

  • Weijun Ke

    (Wuhan University)

Abstract

All-perovskite tandem solar cells hold great promise in surpassing the Shockley–Queisser limit for single-junction solar cells1–3. However, the practical use of these cells is currently hampered by the subpar performance and stability issues associated with mixed tin–lead (Sn–Pb) narrow-bandgap perovskite subcells in all-perovskite tandems4–7. In this study, we focus on the narrow-bandgap subcells and develop an all-in-one doping strategy for them. We introduce aspartate hydrochloride (AspCl) into both the bottom poly(3,4-ethylene dioxythiophene)–poly(styrene sulfonate) and bulk perovskite layers, followed by another AspCl posttreatment. We show that a single AspCl additive can effectively passivate defects, reduce Sn4+ impurities and shift the Fermi energy level. Additionally, the strong molecular bonding of AspCl–Sn/Pb iodide and AspCl–AspCl can strengthen the structure and thereby improve the stability of Sn–Pb perovskites. Ultimately, the implementation of AspCl doping in Sn–Pb perovskite solar cells yielded power conversion efficiencies of 22.46% for single-junction cells and 27.84% (27.62% stabilized and 27.34% certified) for tandems with 95% retention after being stored in an N2-filled glovebox for 2,000 h. These results suggest that all-in-one AspCl doping is a favourable strategy for enhancing the efficiency and stability of single-junction Sn–Pb perovskite solar cells and their tandems.

Suggested Citation

  • Shun Zhou & Shiqiang Fu & Chen Wang & Weiwei Meng & Jin Zhou & Yuanrong Zou & Qingxian Lin & Lishuai Huang & Wenjun Zhang & Guojun Zeng & Dexin Pu & Hongling Guan & Cheng Wang & Kailian Dong & Hongsen, 2023. "Aspartate all-in-one doping strategy enables efficient all-perovskite tandems," Nature, Nature, vol. 624(7990), pages 69-73, December.
  • Handle: RePEc:nat:nature:v:624:y:2023:i:7990:d:10.1038_s41586-023-06707-z
    DOI: 10.1038/s41586-023-06707-z
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    Cited by:

    1. Jin Zhou & Shiqiang Fu & Shun Zhou & Lishuai Huang & Cheng Wang & Hongling Guan & Dexin Pu & Hongsen Cui & Chen Wang & Ti Wang & Weiwei Meng & Guojia Fang & Weijun Ke, 2024. "Mixed tin-lead perovskites with balanced crystallization and oxidation barrier for all-perovskite tandem solar cells," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Yao Zhang & Chunyan Li & Haiyan Zhao & Zhongxun Yu & Xiaoan Tang & Jixiang Zhang & Zhenhua Chen & Jianrong Zeng & Peng Zhang & Liyuan Han & Han Chen, 2024. "Synchronized crystallization in tin-lead perovskite solar cells," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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