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Polymer passivation of defects in inorganic perovskite solar cells

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Abstract

Inorganic perovskite solar cells (IPSCs) have attained attention due to their excellent thermal and phase stability. In this work, we demonstrate a novel approach for fabricating IPSCs, using the strategies of interface passivation and anti-solvent before spin-coating perovskite. Poly(methyl methacrylate) (PMMA) and chlorobenzene (CB) are used as passivator and anti-solvent, respectively. The CB improves the perovskite crystal morphology. Meanwhile, PMMA passivates the defects between poly(3, 4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT: PSS) and perovskite layer, thus increasing the short-circuit current. Excitingly, we find that PMMA benefits the grain boundaries (GBs) of perovskite, which makes it more humidity-resistant, increasing the stability of perovskite film. Especially, PMMA mitigates interfacial charge losses, and the devices based on CsPbI3−xBrx passivated by PMMA exhibit the power conversion efficiency (PCE) much higher than those based on pure CsPbI3−xBrx.

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Authors and Affiliations

  1. School of Electrical and Control Engineering, Shaanxi University of Science & Technology, Xi’an, 710021, China

    Meng Zhang, Wenxi Zhang & Huimin Qiu

  2. School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an, 710021, China

    Fanghui Zhang, Kewang Shi & Jin Huang

Authors
  1. Meng Zhang
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  2. Fanghui Zhang
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  3. Kewang Shi
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  4. Wenxi Zhang
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  5. Jin Huang
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  6. Huimin Qiu
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Corresponding author

Correspondence to Fanghui Zhang.

Additional information

This work has been supported by the National Natural Science Foundation of China (Nos.61904100 and 11604194), and the Education Department of Shaanxi Province Serves the Local Special Plan Project (No.17JF006).

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The authors declare that there are no conflicts of interest related to this article.

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Zhang, M., Zhang, F., Shi, K. et al. Polymer passivation of defects in inorganic perovskite solar cells. Optoelectron. Lett. 18, 338–342 (2022). https://doi.org/10.1007/s11801-022-1187-6

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  • DOI: https://doi.org/10.1007/s11801-022-1187-6

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