Science published a research paper titled Operationally Stable Perovskite Solar Modules Enabled by Vapor-PhaseFluoride Treatment by Guo Wanlin, Zhang Zhuhua, and Zhao Xiaoming from Nanjing University of Aeronautics and Astronautics (NUAA), with NUAA designated as both the first and corresponding author on July 26.
According to the article, 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.
The research group reports a scalable stabilization method using vapor-phase fluoride treatment, which achieves 18.1 percent-efficient solar modules (228 square centimeters) with accelerated aging–projected T80 lifetimes (time to 80 percent of efficiency remaining) of 43,000 ± 9000 hours under 1-sun illumination at 30 C.
This 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.
