A simple method for formulating perovskite inks that leads to scalable perovskite solar cells (PSCs) with unprecedented stability and efficiency has been developed by UNC-CH researchers. The use of bilateral alkylamine additives (BAAs) retained 90% of the initial PSC power conversion efficiency for > 20 days under operational light conditions and > 40 days shelf lifetime. The BAA additive not only yields a record PCE (21.7%) for this competitive class of hybrid perovskite solar cells, but is also compatible with a scalable one-step blade-coating technique. This new method was found to universally increase the device performance for all perovskite compositions tested, including the cost-effective lead-based PSC. Due to the simplistic and universal nature of using BAAs to improve stability, this method is amenable for commercial production of PSCs.
- Bilateral alkylamine for suppressing charge recombination and improving stability in blade-coated perovskite solar cells Wu, W.-Q. et al. Bilateral alkylamine for suppressing charge recombination and improving stability in blade-coated perovskite solar cells. Sci. Adv. 5, eaav8925 (2019).