Despite significant advances in perovskite photovoltaic technology, the performance and stability of flexible perovskite solar modules (f-PSMs) remain below commercial levels, and the clear reasons for this have yet to be elucidated. Jangwon Seo of the Korea Advanced Institute of Science and Technology, Nam Joong Jeon of the Korea Institute of Chemical Technology, Seong Sik Shin of Sungkyunkwan University, and others overcame the stability limitations of high-efficiency, flexible perovskite solar modules.
The authors found that when using SnO2 nanoparticles as the electron transport layer (ETL), there is a trade-off between efficiency and stability in flexible perovskite solar cells (f-PSC) due to the imbalance between surface coverage and charge transport properties. . To address this trade-off, the authors newly designed an ETL that enhances charge transport properties and mitigates shunt sites, thereby improving efficiency and operational stability.
Therefore, the authors achieved power conversion efficiencies of 21.8% for f-PSC and 16.4% for f-PSM. Furthermore, the authors found that incomplete coverage can lead to the formation of shunt paths and lead to current crowding effects, which can have a significant impact on long-term operational stability.
Da Seul Lee et.al Overcoming stability limitations of efficient, flexible perovskite solar modules Joule 2024
DOI: 10.1016/j.joule.2024.02.008
https://doi.org/10.1016/j.joule.2024.02.008