热蒸发铺就钙钛矿光伏器件“高速路”

Core Insights - The research team from Nanjing University of Technology has made a breakthrough in the preparation of perovskite photovoltaic devices, achieving a power conversion efficiency of 25.19% for small-area devices, nearing the current mainstream technology's peak of 26% [1][3] - The developed technology utilizes a fully vacuum thermal evaporation method, which is non-toxic and environmentally friendly, addressing the limitations of traditional solution-based methods that use harmful solvents [2][3] - The innovative "reverse layer-by-layer" deposition strategy significantly enhances the quality of perovskite crystal films, overcoming previous efficiency bottlenecks and ensuring high stability for industrial applications [3][4] Summary by Sections Breakthrough in Technology - The small-area devices achieved a power conversion efficiency of 25.19%, while large-area cells (1 cm²) reached 23.38%, indicating substantial industrial potential [1] - The research was published in "Nature Photonics," highlighting its significance in the field [1] Environmental and Health Benefits - The new vacuum thermal evaporation technique eliminates the use of toxic solvents like DMF and DMSO, making it more suitable for large-scale production [2] - This method is considered an ideal process for transitioning high-performance perovskite photovoltaic devices from the lab to production lines [2] Efficiency and Stability - The traditional thermal evaporation method struggled to exceed 20% efficiency due to challenges in forming high-quality perovskite films [3] - The new deposition strategy, which reverses the traditional order of material application, significantly improves the interaction and diffusion of solid-state materials, leading to superior film quality [3] Industrialization Prospects - The combination of high efficiency, stability, and excellent large-area preparation performance suggests a promising industrialization outlook for this technology [4] - Perovskite solar cells are recognized as a new generation of photovoltaic technology due to their lower cost, lightweight, and flexibility, making this research a critical step towards scalable and environmentally friendly production [4]