Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.682
Publication date: 16th December 2024
The strategic opportunities of emerging photovoltaics lies in their potential for sustainable large-area manufacturing using scalable solution-processing techniques such as slot-die coating. Perovskite solar cells are, facinatingly, to date the best solution-processable solar cell technology on the verge of commercialization. Mass-production, however, requires the development greener fabrication protocols.
In this talk we will addresses the dual challenges of scalability and environmental sustainability by exploring the development of more environmentally benign ink formulations for perovskite solar cells. Using protic ionic liquids (PIL) as ink additives in water- and alcohol-based precursor inks, we optimized the ink chemistry and process parameters to achieve uniform films with superior optoelectronic properties by slot-die coating. The PIL-based ink underwent a direct liquid-to-solid transition during film formation without forming intermediates, as confirmed by in-situ grazing incidence wide-angle X-ray scattering (GIWAXS). The optimized solvent system, a mixture of water, isopropanol (IPA), and MAP, enabled one-step slot-die coating at ambient conditions, achieving slot-die coated solar cell efficiencies up to 10%. This eco-friendly ink reduces toxicity, extends shelf life, and is stable in ambient environments, presenting a viable pathway for sustainable commercial applications.
This work highlights the potential for green ink formulations in scaling up perovskite solar cell manufacturing. Future efforts will focus on developing data infrastructure to integrate life cycle assessment (LCA) at early ink development stages, enabling the systematic design of environmentally optimized precursor inks and processes.
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International Conference on Hybrid and Organic Photovoltaics
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