Researchers have developed a new method for creating highly efficient perovskite/silicon tandem solar cells using thermally evaporated perovskite films and a formamidinium eutectic. This technique addresses challenges in large-scale manufacturing of these promising next-generation solar technologies.
The study, published on August 5, 2026, details the use of a formamidinium eutectic to facilitate the thermal evaporation of perovskite films onto silicon substrates. This approach allows for better control over film quality and uniformity compared to traditional solution processing methods. The resulting tandem cells demonstrate improved performance characteristics.
The researchers explain that achieving high efficiency in perovskite/silicon tandems requires precise control over the perovskite layer’s composition and morphology. Traditional methods often struggle with scalability and reproducibility. The thermally evaporated perovskite, enabled by the formamidinium eutectic, offers a pathway to overcome these limitations. The use of thermal evaporation allows for more precise deposition and better film quality.
The team's work represents a significant step towards realizing the potential of perovskite/silicon tandem solar cells as a cost-effective and efficient renewable energy source. Further research will focus on optimizing the process for even higher efficiencies and long-term stability.
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