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Low-hysteresis perovskite solar cells based on a spray-coated electron transport layer

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Abstract

J–V hysteresis brings great challenges to the performance and stable measurement of perovskite solar cells (PSCs). One of the factors affecting the J–V hysteresis of PSCs is the morphology and optoelectronic properties of the electron transport layer (ETL). In this study, PSC devices with negligible hysteresis effects are obtained using a spray-coated tin oxide film as the ETL. Compared with PSC devices using spin-coated ETLs, devices containing spray-coated ETLs retain a lower density of defect states and better electron extraction efficiency. Therefore, the hysteresis effect of the PSC devices using the spray-coated ETL is significantly reduced. Then, through a simple substrate preheating method, the uniformity of the sprayed tin oxide film is improved, and the ETL/perovskite interface is promoted. The PSCs with good reproducibility deliver a hysteresis index of 0.029. This work reveals a new method for the large-scale fabrication of perovskite solar cells with a low hysteresis effect.

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Data availability

The datasets generated during the current study are available from the corresponding author upon reasonable request.

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Acknowledgements

This work was supported by the Scientific Research Foundation of Jiangsu Provincial Education Department (Grant No. 21KJB510010), the Natural Science Foundation of Jiangsu Province (Grant No. BK20220624, BK20220620) and the Changzhou Sci&Tech Program (Grant No. CJ20210127).

Funding

This work was supported by the Scientific Research Foundation of Jiangsu Provincial Education Department (Grant No. 21KJB510010), the Natural Science Foundation of Jiangsu Province (Grant No. BK20220624, BK20220620) and the Changzhou Sci&Tech Program (Grant No. CJ20210127).

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Authors and Affiliations

  1. School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213164, China

    Xiaohong Zheng, Jian Su, Shanyi Liu, Huafei Guo, Ding Gu, Sai Jiang & Jianhua Qiu

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  1. Xiaohong Zheng
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  2. Jian Su
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  3. Shanyi Liu
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  4. Huafei Guo
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  5. Ding Gu
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  7. Jianhua Qiu
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by XZ, JS and JQ. The first draft of the manuscript was written by XZ and JS, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jian Su or Jianhua Qiu.

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Zheng, X., Su, J., Liu, S. et al. Low-hysteresis perovskite solar cells based on a spray-coated electron transport layer. J Mater Sci: Mater Electron 34, 172 (2023). https://doi.org/10.1007/s10854-022-09690-9

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