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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.

権利情報:

• 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.

キーワード: lead-free, Ag-Bi-I system, rudorffite, additive, photovoltaic, defect passivation

刊行年月日: 2025-04-14

出版者: American Chemical Society (ACS)

掲載誌:

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

研究助成金:

• Kurata Memorial Hitachi Science and Technology Foundation 1572

原稿種別: 著者最終稿 (Accepted manuscript)

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

公開URL: https://doi.org/10.1021/acsaem.5c00234

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更新時刻: 2025-04-15 15:33:51 +0900

MDRでの公開時刻: 2026-03-31 12:24:50 +0900