Project Introduction: An important "revolution" in the field of solar cells. Perovskite solid-state solar cells have achieved an authenticated conversion efficiency of 22.1% in just five years, surpassing the development process of other types of batteries that took decades. With their high efficiency, low cost, and simple manufacturing process, they have become the most disruptive competitors in the solar cell industry. Perovskite solar cells use perovskite-type organometallic halide semiconductors as the light-absorbing material and belong to the third generation of solar cells, also known as new concept solar cells. The perovskite solar cell studied in this project is a solar cell with the perovskite structure of methylamine lead iodide (such as MAPbI3) as the absorber layer. Methylamine lead iodide is a direct bandgap semiconductor material with a wide absorption spectrum. Strong absorption and long carrier transport distance. Innovation: The project focuses on the bottlenecks of industrialization in perovskite thin-film solar cells, inventing a unique perovskite preparation process method, mastering uniform preparation technology for large areas of perovskite films, and possessing independent intellectual property rights. Research has developed a large-area perovskite film preparation method using the 'evaporation/solution composite process'. This approach perfectly achieves the uniformity challenge of large-area perovskite films through evaporation (PbI2)/solution (MAI), and the entire process is completed at low temperatures (below 80 degrees Celsius), making it particularly suitable for the fabrication of flexible thin-film solar cells. Additionally, the process is compatible with existing vacuum equipment and techniques, solving the problem of difficulty in industrializing experimental results. Currently, the best perovskite cell conversion efficiency achieved in the laboratory is 19.6%, and flexible thin-film solar cells have an efficiency exceeding 17%. Prospects: As a lightweight flexible thin-film solar cell (flexible), the main application areas include: outdoor multifunctional charging power sources; battery backup charging systems for consumer electronic products; New energy aircraft, automobiles, etc. Such as the 'Solar Impulse 2' solar-powered aircraft, new solar-powered automobiles; military uses (individual soldier informationized field power supplement, near space airships and other sources of electricity; urban landscape power supplement; distributed smart building power supply, generation systems.