Beyond 27% perovskite solar cells: A deep study based on in-situ charge dynamics and crystal growth kinetics
International project carried out in cooperation with scientists from South Korea, Slovakia, Czech Republic and Hungary
Perovskite solar cells (PVKSCs) have seen tremendous growth over the preceding decade due to stupendous efforts put by the scientific community worldwide to harness their outstanding properties which make them the most viable alternative for the next-gen solars after Silicon. The research in these ABX3 materials have focused on compositional tuning, as the specific composition affects the bandgap and properties of the perovskite. In recent past, formamidinium (FA) cation has replaced the conventionally used methylammonium (MA) cation at the A-site, as the resulting perovskite Formamidinium lead triiodide (FAPbI3) proffers better thermal stability with narrower bandgaps, and lower ion migration resulting in stable modules which has helped them reach an astonishing high power conversion efficiency of 25.7%. This project aims to prepare PVKSCs modules with high efficiencies and high stability with the overarching goal to be able to commercialize them. By controlling the growth and preventing the reversal to the δ phase, these durable FAPbI3 PVKSCs could sustain performance over a long time, thusproviding a suitable alternative to expensive silicon solar cells in the near future. With the help of global collaboration, this project would also help in understanding the fundamental mechanisms of VOC loss, non-radiative recombination and charge carrier dynamics. This knowledge could then be potentially applied to further the advances in the broad area of perovskite optoelectronics such as LEDs and photodetectors.
