Article Pseudohalide Functional Additives in Tin Halide Perovskite for Efficient and Stable Pb-Free Perovskite Solar Cells

Dhruba B. Khadka SAMURAI ORCID (National Institute for Materials Science) ; Yasuhiro Shirai SAMURAI ORCID (National Institute for Materials Science) ; Masatoshi Yanagida SAMURAI ORCID (National Institute for Materials Science) ; Kenjiro Miyano SAMURAI ORCID (National Institute for Materials Science)

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Dhruba B. Khadka, Yasuhiro Shirai, Masatoshi Yanagida, Kenjiro Miyano. Pseudohalide Functional Additives in Tin Halide Perovskite for Efficient and Stable Pb-Free Perovskite Solar Cells. ACS Applied Energy Materials. 2021, 4 (11), 12819-12826. https://doi.org/10.1021/acsaem.1c02496
SAMURAI

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(abstract)

The progress of tin-based halide perovskite solar cells (Sn-HaPSCs) is obstructed by their poor stability arising from tin oxidation. Herein, we introduced phenethylammonium thiocyanate (PEASCN) as a pseudohalide functional additive into an FASnI3 perovskite film to improve the optoelectronic properties. This approach is found to be effective for the suppression of Sn oxidation and the formation of a compact and larger grain film with a higher degree of crystallinity. The device with the PEASCN additive improved the device efficiency from 4.52% (for pristine Sn-HaP) to 9.65% with a significant increase of VOC from ∼0.411 to 0.667 V and superior device stability. The device analysis revealed that the PEASCN additive has improved the optoelectronic properties coupled with a higher diffusion potential and suppression of bulk and interface defects in the Sn-HaPSC. This work corroborates that the incorporation of a pseudohalide-based functional additive in FASnI3 is propitious for better film formation, passivation of detrimental surface chemistry, and defects at the interface and in the bulk.

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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 © 2021 American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acsaem.1c02496.

Keyword: Tin perovskite, lead free, tin oxidation, device stability, pseudohalide, defect profile

Date published: 2021-11-22

Publisher: American Chemical Society (ACS)

Journal:

  • ACS Applied Energy Materials (ISSN: 25740962) vol. 4 issue. 11 p. 12819-12826

Funding:

  • Yazaki Memorial Foundation for Science and Technology

Manuscript type: Author's version (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5056

First published URL: https://doi.org/10.1021/acsaem.1c02496

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Updated at: 2024-11-29 16:31:44 +0900

Published on MDR: 2024-11-29 16:31:44 +0900

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