Presentation Information

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)English Presentation

[7p-N406-6]Effect of Fullerene-Based Functional Derivatives in Sn-Perovskite Solar Cells

〇DHRUBA B KHADKA¹, Aman Shukla^1,2, Chunqing Li³, Masahiro Rikukawa³, Yuko Takeoka³, Ryoji Sahara¹, Masatoshi Yanagida¹, Yasuhiro Shirai¹ (1.National Institute for Materials Science, 2.IIT Kanpur, 3.Sophia University)

Keywords:

Tin Perovskite Solar Cells,Fullerene functional derivatives,Photo Physics

Tin-based perovskite solar cells offer a promising Pb-free alternative for photovoltaic applications. But their practical deployment is hindered by the Sn2+ oxidation, which introduces structural defects and affects device performance and stability. In this study, we have used a series of fullerene-based multifunctional derivatives, such as F-COOH, F-OH, and F-OSO3H, were employed as additives to interact with Sn2+ ions. Among these additives, F-COOH demonstrated the most effective I suppressing Sn4+ formation and reducing non-radiative recombination losses. This results in improved device efficiency from 8.20 to 11.22 % along with enhanced reproducibility and operational stability. This work highlights the critical role of functional group selection in the molecular design of additives. It provides a viable strategy for advancing efficient and stable lead-free perovskite solar cell technologies.

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