Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO26)
Publication date: 22nd April 2026
Halide perovskite solar cells have rapidly emerged as a leading candidate in next-generation photovoltaics due to their high efficiency and cost-effective fabrication. However, their commercial viability remains challenged by environmental and stability concerns. In this work, we present a comprehensive approach to the sustainable development of halide perovskite photovoltaics through environmentally conscious materials and processes. Key strategies include the use of green solvents for perovskite film deposition, enabling safer and more scalable fabrication routes. We demonstrate the fabrication of fully flexible perovskite solar cells under ambient air conditions using low-toxicity, eco-friendly solvents. To further minimize solvent use, we explore solvent-free thermal evaporation as an alternative method for perovskite layer deposition, significantly reducing chemical waste. Additionally, we replace conventional noble metal electrodes with carbon-based back contacts, offering a cost-effective and sustainable alternative with good conductivity and stability, showcasing potential for full roll-to-roll production. Finally, we address the critical issue of lead toxicity by partially substituting lead with tin in mixed Pb-Sn perovskite compositions, achieving reduced environmental impact while maintaining promising photovoltaic properties as single junction as well as in perovskite/perovkite tandem.
Together, these innovations mark significant progress toward greener, safer, and more sustainable perovskite solar technologies suitable for widespread deployment.
We acknoledge the Horizon Europe Project PEARL (n.101122283) and the Italian MASE project GOPV
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