FURI | Spring 2024

Developing More Stable and Efficient FAPbI3-based Perovskites

There has been increased focus on using perovskites photovoltaics for their tunable properties and low-cost manufacturability. The research will investigate formamidiniun lead iodide (FAPbI3), whose band gap of 1.48 eV makes it an ideal material for single junction photovoltaics. However, FAPbI3 faces thermodynamic stability problems — the ideal cubic α-FAPbI3only forms at about 160°C, and quickly degrades to a hexagonal δ-FAPbI3 yellow phase at room temperature which is not photoactive. Through the addition of different compounds such as small amounts of potassium, rubidium, and cesium, this project will investigate how such additives can ideally improve the processability stability of this perovskite.