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Bridging buried interface enable 24.67%-efficiency doctor-bladed perovskite solar cells in ambient condition

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Abstract

Scalable deposition of high-efficiency perovskite solar cells (PSCs) is critical to accelerating their commercial applications. However, a significant number of defects are distributed at the buried interface of perovskite film fabricated by scalable deposition, exhibiting much negative influence on the efficiency and stability of PSCs. Herein, 2-(N-morpholino)ethanesulfonic acid potassium salt (MESK) is incorporated as the bridging layer between the tin oxide (SnO2) electron transport layer (ETL) and the perovskite film deposited via scalable two-step doctor blading. Both experiment and simulation results demonstrate that MESK can passivate the trap states of Sn suspension bonds, thereby enhancing the charge extraction and transport of the SnO2 ETL. Meanwhile, the strong interaction with uncoordinated Pb ions can modulate the crystal growth and crystallographic orientation of perovskite film and passivate buried defects. With employing MESK interface bridging, PSCs fabricated via scalable doctor blading in ambient condition achieve a power conversion efficiency (PCE) of 24.67%, which is one of the highest PCEs for doctor-bladed PSCs, and PSC modules with an active area of 11.35 cm2 achieve a PCE of 19.45%. Furthermore, PSCs exhibit excellent long-term stability, and the unpackaged target device with a storage of 1680 h in ambient condition (25 °C and humidity of 30% relative humidity (RH)) can maintain more than 90% of the initial PCE. The research provides a strategy for constructing a high-performance interface bridge between SnO2 ETL and perovskite film, and achieving efficient and stable large-area PSCs and modules fabricated via scalable doctor-blading process in ambient condition.

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Acknowledgements

The authors acknowledge support from the National Natural Science Foundation of China (No. U23A20138) and the National Key Research and Development Program of China (No. 2022YFB3803300). This work was supported by the State Key Laboratory of Powder Metallurgy, Central South University, China and was also supported in part by the High-Performance Computing Center of Central South University.

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  1. Jianhui Chang and Erming Feng contributed equally to this work.

Authors and Affiliations

  1. Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics, Central South University, Changsha, 410083, China

    Jianhui Chang, Erming Feng, Xiangxiang Feng, Hengyue Li, Yang Ding, Caoyu Long, Siyuan Lu, Wen Deng, Yongbo Yuan & Junliang Yang

  2. Hunan Key Laboratory of Nanophotonics and Devices, School of Physics, Central South University, Changsha, 410083, China

    Jianhui Chang, Erming Feng, Xiangxiang Feng, Hengyue Li, Yang Ding, Caoyu Long, Siyuan Lu, Haixia Zhu, Si Xiao & Junliang Yang

  3. Textile and Fashion Collage, Hunan Institute of Engineering, Xiangtan, 411101, China

    Jiayan Shi

  4. Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China

    Yingguo Yang

  5. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China

    Junliang Yang

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Chang, J., Feng, E., Feng, X. et al. Bridging buried interface enable 24.67%-efficiency doctor-bladed perovskite solar cells in ambient condition. Nano Res. (2024). https://doi.org/10.1007/s12274-024-6639-9

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  • DOI: https://doi.org/10.1007/s12274-024-6639-9

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