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Halide perovskite solar cells (PSCs) with state-of-the-art efficiencies consist of thermally unstable methylammonium (MA). In this report, we have employed the surface passivation method with multifunctional fluoroarene molecule, which suppresses the formation of PbI2 and δ-perovskite phase in MA/Br-free perovskite film. The penta fluoro-phenylhydrazine (SF -PHZ) passivation effectively mitigates the defects at surface or grain boundaries in perovskite film with fluoroarene embedded interfacial layer as a consequence of stronger halogen bonding with fluoroarene moieties or NH-NH2 terminal. As a result, the PSC with a p-i-n configuration achieved superior operational thermal stability and a PCE exceeding 22 % with a large area of ~1 cm2, This work underscores a universal strategy for defect passivation to further improvement of efficiency using a multifunctional passivator. This report gives insights into the film growth properties, device photo-physics, and defect analysis correlating with device performance and device stability.

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• In Copyright
  

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キーワード: MA-free Perovskite, Fluoroarene molecule, device photo-physics, defect analysis, device stability

刊行年月日: 2023-06-11

出版者: IEEE

掲載誌:

• 2023 IEEE 50th Photovoltaic Specialists Conference (PVSC)

研究助成金:

• JST -Mirai Program JPMJMI21E6

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4764

公開URL: https://doi.org/10.1109/pvsc48320.2023.10359928

関連資料:

• describes
• Modulating Efficiency and stability of Methylammonium/Br-Free Perovskite Solar Cells Using Fluoroarene Hydrazine (poster)
• https://doi.org/10.48505/nims.4196

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更新時刻: 2025-06-19 08:30:30 +0900

MDRでの公開時刻: 2025-06-19 01:31:52 +0900