Bulk passivation boosts the performance of perovskite solar cells

In a new report published in Joule, lead author Dr. Sandy Sánchez-Alonso and co-workers demonstrate a highly efficient and stable perovskite solar cell using a new approach that combines a simple chemical additive, TEMPO, with a rapid infrared curing process. This method produced solar cells with over 20% efficiency and impressive long-term stability—retaining more than 90% of their performance after nearly 4,300 hours of continuous operation. TEMPO improves the quality of the solar film by reducing defects and enhancing crystal formation, paving the way for faster, more scalable production of durable perovskite solar technologies.