Journal article Effect of Alkali-Metal Additive on Rudorffite AgBiI4-Based Pb-Free Solar Cells
Shanas Fatima (author) (Search by this author)
ORCID https://orcid.org/0009-0000-8233-6277 (unauthenticated)
ORCID ; ORCID SAMURAI ; ORCID SAMURAI ;
Sunil Kumar Singh (author) (Search by this author)
ORCID https://orcid.org/0000-0002-1028-6255 (unauthenticated)
ORCID ; ORCID SAMURAI
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Citation
Shanas Fatima, Dhruba B. Khadka, Masatoshi Yanagida, Sunil Kumar Singh, Yasuhiro Shirai. Effect of Alkali-Metal Additive on Rudorffite AgBiI4-Based Pb-Free Solar Cells. ACS Applied Energy Materials. 2025, 8 (7), 4601-4608. https://doi.org/10.1021/acsaem.5c00234

Description:

(abstract)

Rudorffite material, silver bismuth iodide, is one of the promising lead-free alternatives for photovoltaic applications due to its high absorption coefficient, low toxicity, and relatively better stability. Here, we report on the effects of alkali halide additive in the absorber material AgBiI4, focusing on its material properties and solar cell devices. The inclusion of NaI significantly improved the film quality with compact and pinhole-free morphology and better crystallinity. The device with rudorffite material with NaI additive demonstrated a notable increase in the PCE from 1.33 to 3.72%, along with improved device stability. The device analysis confirmed that NaI incorporation in AgBiI4 modulates the optoelectronic quality, effectively suppressing charge recombination and enhancing charge extraction within the device. Thus, this work corroborates that additive engineering is an effective strategy for improving both the efficiency and stability of AgBiI4-based rudorffite solar cells, underscoring their potential in sustainable photovoltaic applications.

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  • In Copyright

    This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials, copyright © 2025 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsaem.5c00234.

Keyword: lead-free, Ag-Bi-I system, rudorffite, additive, photovoltaic, defect passivation

Date published: 2025-04-14

Publisher: American Chemical Society (ACS)

Journal:

  • ACS Applied Energy Materials (ISSN: 25740962) vol. 8 issue. 7 p. 4601-4608

Funding:

  • Kurata Memorial Hitachi Science and Technology Foundation 1572

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5431

First published URL: https://doi.org/10.1021/acsaem.5c00234

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Updated at: 2025-04-15 15:33:51 +0900

Published on MDR: 2026-03-31 12:24:50 +0900

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