Operationally stable perovskite solar modules enabled by vapor-phase fluoride treatment

• 成果类型: Article
• 署名作者: Zhao, Xiaoming; Zhang, Peikun; Liu, Tianjun; Tian, Bingkun; Jiang, Ying; Zhang, Jinping; Tang, Yajing; Li, Bowen; Xue, Minmin; Zhang, Wei; Zhang, Zhuhua; Guo, Wanlin
• 署名单位: Nanjing University of Aeronautics & Astronautics; Nanjing University of Aeronautics & Astronautics; University of Cambridge
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10389
• DOI: 10.1126/science.adn9453
• 发表日期: 2024-07-26
• 页码: 433-438
• 关键词: lead halide perovskites; efficient; cells; degradation; STABILITY; iodide; light; cation; layer

摘要

The ever-increasing power conversion efficiency of perovskite solar cells has illuminated the future of the photovoltaic industry, but the development of commercial devices is hampered by their poor stability. In this study, we report a scalable stabilization method using vapor-phase fluoride treatment, which achieves 18.1%-efficient solar modules (228 square centimeters) with accelerated aging-projected T 80 lifetimes (time to 80% of efficiency remaining) of 43,000 +/- 9000 hours under 1-sun illumination at 30 degrees C. The high stability results from vapor-enabled homogeneous fluorine passivation over large-area perovskite surfaces, suppressing defect formation energy and ion diffusion. The extracted degradation activation energy of 0.61 electron volts for solar modules is comparable to that of most reported stable cells, which indicates that modules are not inherently less stable than cells and closes the cell-to-module stability gap.