Article Optimization of Crystal Growth and Defect Passivation of FASnI3 Film by Using 2-Pyridylthiourea for Sn-Based Perovskite Solar Cells

Md. Emrul Kayesh ; Yulu He ; Md. Abdul Karim ORCID ; Siliang Cao ; Shamim Ahmmed ORCID ; Yasuhiro Shirai SAMURAI ORCID ; Ashraful Islam SAMURAI ORCID

Optimization of Crystal Growth and Defect Passivation of FASnI3 Film by Using 2-Pyridylthiourea for Sn-based Perovskite Solar Cells.docx
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Md. Emrul Kayesh, Yulu He, Md. Abdul Karim, Siliang Cao, Shamim Ahmmed, Yasuhiro Shirai, Ashraful Islam. Optimization of Crystal Growth and Defect Passivation of FASnI3 Film by Using 2-Pyridylthiourea for Sn-Based Perovskite Solar Cells. ACS Applied Energy Materials. 2025, 8 (4), 2043-2049. https://doi.org/10.1021/acsaem.4c02534

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(abstract)

Currently, tin (Sn) is the most efficient alternative to lead (Pb) for perovskite solar cells (PSCs). However, the fabrication of pinhole-free uniform and highly crystalline Sn-perovskite typically, FASnI3 films remains a crucial factor due to their rapid crystallization. To address this issue, we incorporated 2-pyridylthiourea (2PTU) into the precursor solution during FASnI3 film fabrication. Based on the morphology, structure, and elements analysis, we have observed that 2PTU impacts the growth of perovskite crystals and surface morphology by coordinating with SnI6 4– octahedral. Moreover, the 2PTU-added FASnI3 film contained fewer defects and a prolonged carrier lifetime. These substantial improvements in the FASnI3 film resulted in an enhanced open-circuit voltage, elevating the power conversion efficiency of Sn-PSC from 10.23% (pristine) to 12.85% (2PTU). Significantly, after 500 h of continuous illumination at maximum power point tracking under one sun, the 2PTU-added FASnI3-based PSCs showed remarkable stability and maintained above 90% of their initial PCE.

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  • In Copyright

    This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Applied Energy Materials, copyright © 2025 American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acsaem.4c02534.

Keyword: Sn-based Perovskite Solar Cells, 2-Pyridylthiourea , Defect Passivation

Date published: 2025-02-24

Publisher: American Chemical Society (ACS)

Journal:

  • ACS Applied Energy Materials (ISSN: 25740962) vol. 8 issue. 4 p. 2043-2049

Funding:

  • JST-Mirai Program JPMJMI21E6
  • Japan Society for the Promotion of Science 22H02190
  • Advanced Low Carbon Technology Research and Development Program JPMJAN23B2

Manuscript type: Author's version (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5949

First published URL: https://doi.org/10.1021/acsaem.4c02534

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Updated at: 2025-12-03 08:30:03 +0900

Published on MDR: 2025-12-03 08:22:50 +0900

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