Nanowerk February 15, 2022
Most perovskite films in laboratories around the world are deposited through spin coating which guarantees high control on film thickness as well as morphology. However, most of the ink is expelled during deposition and wasted. An international team of researchers (Iran, Italy) has developed a completely new method that uses a simple sheet of paper to deposit the perovskite films without a spin coater or other large area techniques such as slot-die coating or blade coating. They fabricated solar cells on flexible PET substrates manually with 11% power conversion efficiency. Deposition after soaking the sheet of paper in a green antisolvent improved the efficiency by 82% compared to when using dry paper as applicator. The new technique enables manual film deposition without any expensive equipment and has the potential to be fully automated for future optimization and exploitation. Video …read more. Open Access TECHNICAL ARTICLE
Graphical abstract. Credit: iScience, VOLUME 25, ISSUE 2, 103712, FEBRUARY 18, 2022Â