新型钙钛矿光伏器件光电转换效率达25.19%

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]