Core Insights - Perovskite solar cells are gaining attention as a next-generation photovoltaic technology due to their lower costs, lightweight, and flexibility [1] - A breakthrough at Nanjing University of Technology has achieved a power conversion efficiency of 25.19% for small-area devices, nearing the current mainstream technology's efficiency of 26% [1] - The large-area cells (1 cm²) produced using this method achieved an efficiency of 23.38%, indicating significant industrialization potential [1] Group 1 - The commonly used method for fabricating perovskite solar cells in laboratories is the solution method, which involves toxic solvents that are harmful to health and the environment [2] - The team has developed a "fully vacuum thermal evaporation" technique that deposits thin films in a vacuum environment, eliminating solvents and ensuring precise control over the process [2] - This method is considered an ideal candidate for transitioning high-performance perovskite photovoltaic devices from the lab to production lines [2] Group 2 - The research team proposed a "reverse layer-by-layer" deposition strategy combined with a self-assembling molecular "adhesive" to grow high-quality perovskite crystal films [2] - The three main highlights of this research are high efficiency, high stability, and excellent large-area fabrication performance, which outline the broad industrialization prospects of this technology [2] - The results not only set a world record for the fabrication of perovskite solar cells using fully vacuum thermal evaporation but also provide a solid scientific foundation for future optimization and large-scale manufacturing of efficient, stable, and environmentally friendly perovskite photovoltaic devices [2]

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]

Core Insights - Nanjing University of Technology's research team developed a perovskite photovoltaic device with a high power conversion efficiency of 25.19% using a vacuum thermal evaporation technique, maintaining over 95% performance after 1000 hours of operation [1][2] - The team’s method eliminates the use of toxic solvents, which are common in traditional solution-based methods, thus enhancing the potential for large-scale production [1] - The innovative reverse layer deposition strategy significantly improved the quality of perovskite crystal films, contributing to the efficiency and stability of the devices [2] Group 1 - The perovskite photovoltaic device measures 0.066 square centimeters and demonstrates a power conversion efficiency of 25.19% [1] - A 1 square centimeter device achieved an efficiency of 23.38%, indicating substantial industrialization potential [1] - The research was published in the international journal "Nature Photonics" [1] Group 2 - The vacuum thermal evaporation technique allows for precise control of the film formation process without solvents, making it an ideal solution for scaling up production [1][2] - The team utilized a unique sequence of depositing materials, which enhances the interaction and diffusion of solid-state materials during the annealing process, leading to high-quality perovskite films [2] - This breakthrough not only sets a world record for vacuum thermal evaporation technology but also lays the groundwork for future advancements in efficient and environmentally friendly perovskite photovoltaic devices [2]