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Interface modification by Fmoc-Met-OH molecule for high-efficient perovskite solar cells

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Abstract

The numerous defects on the surface and grain boundaries of polycrystalline perovskite after solution treatment would seriously affect the performance of organic–inorganic hybrid perovskite solar cells. Interface modification is considered to be an effective method to reduce defects of the perovskite films. In this work, a multi-functional amino acid molecule, Fmoc-Met-OH, was introduced into anti-solvent solution to delay the crystallization of perovskites for high-quality perovskite films. Systematic study demonstrates that amino acid molecules play a significant role in promoting the morphology and crystal structure of perovskite films. The surface trap states of perovskite films are reduced by the interaction of Fmoc-Met-OH functional groups with the uncoordinated metal cation of perovskite, resulting in inhibition of charge recombination and enhanced charge transport. The efficiency of the modified device can reach up to 16.75% compared to 14.17% of the control counterpart. Moreover, the unpackaged device exhibited good stability and can retain 65% of the initial efficiency after being stored in air atmosphere at 30% humidity for 220 h.

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Data availability

The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We appreciate the financial supports from the National Natural Science Foundation of China (No. 52102470). The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Authors and Affiliations

  1. College of Automotive Engineering, Jilin University, Changchun, 130022, China

    Bin Ma & Siyan Chen

  2. The Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China

    Xuewen Sun, Su Yan & Jian Song

  3. School of Transportation Science and Engineering, Beihang University, Beijing, 102206, China

    Bin Ma, Lisheng Zhang & Xinhua Liu

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  1. Bin Ma
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  3. Su Yan
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  6. Xinhua Liu
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Contributions

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

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Correspondence to Siyan Chen, Xinhua Liu or Jian Song.

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Ma, B., Sun, X., Yan, S. et al. Interface modification by Fmoc-Met-OH molecule for high-efficient perovskite solar cells. J Mater Sci: Mater Electron 33, 15359–15368 (2022). https://doi.org/10.1007/s10854-022-08435-y

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