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A universal close-space annealing strategy towards high-quality perovskite absorbers enabling efficient all-perovskite tandem solar cells

Author

Listed:
  • Changlei Wang

    (Soochow University)

  • Yue Zhao

    (Soochow University)

  • Tianshu Ma

    (Soochow University)

  • Yidan An

    (Soochow University)

  • Rui He

    (Sichuan University, Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education)

  • Jingwei Zhu

    (Sichuan University, Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education)

  • Cong Chen

    (Sichuan University, Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education)

  • Shengqiang Ren

    (Sichuan University, Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education)

  • Fan Fu

    (Laboratory for Thin Films and Photovoltaics, Empa—Swiss Federal Laboratories for Materials Science and Technology)

  • Dewei Zhao

    (Sichuan University, Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education)

  • Xiaofeng Li

    (Soochow University)

Abstract

The broad bandgap tunability of organic–inorganic metal halide perovskites enables the fabrication of multi-junction all-perovskite tandem solar cells with ultra-high power conversion efficiencies (PCEs). Controllable crystallization plays a crucial role in the formation of high-quality perovskites. Here we report a universal close-space annealing strategy that increases grain size, enhances crystallinity and prolongs carrier lifetimes in low-bandgap (low-Eg) and wide-bandgap (wide-Eg) perovskite films. By placing the intermediate-phase perovskite films with their faces towards solvent-permeable covers during the annealing process, high-quality perovskite absorber layers are obtained with a slowed solvent releasing process, enabling fabrication of efficient single-junction perovskite solar cells (PVSCs) and all-perovskite tandem solar cells. As a result, the best PCEs of 21.51% and 18.58% for single-junction low-Eg and wide-Eg PVSCs are achieved and thus ensure the fabrication of 25.15% efficiency 4-terminal and 25.05% efficiency 2-terminal all-perovskite tandem solar cells.

Suggested Citation

  • Changlei Wang & Yue Zhao & Tianshu Ma & Yidan An & Rui He & Jingwei Zhu & Cong Chen & Shengqiang Ren & Fan Fu & Dewei Zhao & Xiaofeng Li, 2022. "A universal close-space annealing strategy towards high-quality perovskite absorbers enabling efficient all-perovskite tandem solar cells," Nature Energy, Nature, vol. 7(8), pages 744-753, August.
    • Handle: RePEc:nat:natene:v:7:y:2022:i:8:d:10.1038_s41560-022-01076-9
    DOI: 10.1038/s41560-022-01076-9
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    Cited by:

    1. Soonil Hong & Jinho Lee, 2022. "Recent Advances and Challenges toward Efficient Perovskite/Organic Integrated Solar Cells," Energies, MDPI, vol. 16(1), pages 1-19, December.

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