University of Sistan and Baluchestan, Iranian Society Of Mechanical Engineers Challenges in Nano and Micro Scale Science and Technology 2821-000X 13 2 2025 09 01 Impact of Plasma-Coated SnO₂ Nanostructures on TiO₂ Surface for Enhanced Stability and Performance of Perovskite Solar Cells 97 101 9844 10.22111/cnmst.2026.54667.1281 EN Zeynab Kiamehr Department of Physics, Tafresh University, Tafresh, Iran Journal Article 2026 02 05 In this study, SnO2 nanostructures synthesized via the hydrothermal route and deposited by plasma process were employed as an interface modification layer in a perovskite solar cell with FTO/TiO2/SnO2/CH3NH3PbI3/Au architecture. The results showed that precise interface engineering through the introduction of SnO2 significantly improves charge transport and extraction. Structural and spectroscopic analyses confirm the formation of a stable and high-purity SnO2 phase. In contrast, the plasma coating technique allows the formation of a thin, uniform, and well-adhered layer at low temperature conditions compatible with perovskite materials. The improved electrical and optical responses of the modified devices indicate a reduced trap density and optimized interface charge transport paths, leading to enhanced photovoltaic performance even in a simple configuration without a hole transport layer, fabricated under ambient conditions. These findings highlight the effectiveness of plasma-assisted SnO₂ interface engineering as a practical and scalable strategy to improve the performance and stability of perovskite solar cells. https://chal.usb.ac.ir/article_9844_3417e73e5b5a7c1d27da78d1595a44a6.pdf