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説明:

This study explores the potential of molecular passivation to enhance both the efficiency and operational stability of perovskite solar cells. We investigate the impact of diammonium iodide functional molecules with aryl or alkyl cores on 3D-perovskite surfaces. We found that piperazine dihydriodide, featuring an alkyl core and an electron-rich -NH terminal was effective in mitigating surface and bulk defects. This molecular passivator not only modifies surface chemistry but also improves carrier extraction efficiency, leading to an impressive 23.17% efficiency with superior long-term stability. Detailed device analysis suggests that robust bonding interactions significantly reduce defect densities in the perovskite film and suppress ion migration. This report provides insights into the synergistic effect of bifunctional molecules in defect mitigation, paving the way for design strategies centered on bonding-regulated molecular passivation to enhance both the performance and stability of solar cells.

権利情報:

• In Copyright
  

キーワード: MA-free Perovskite, Surface Passivation, Device Stability

刊行年月日: 2024-06-09

出版者: IEEE

掲載誌:

• 2024 IEEE 52nd Photovoltaic Specialist Conference (PVSC) (ISSN: 29951755) p. 2-4

会議:

研究助成金:

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.5032

公開URL: https://doi.org/10.1109/pvsc57443.2024.10749333

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更新時刻: 2024-12-10 16:54:02 +0900

MDRでの公開時刻: 2024-12-10 16:54:03 +0900