Perovskite PV Materials*

Perovskite photovoltaic (PV) ABX₃ systems possess high energy-conversion efficiencies.  Understanding their atomic-level properties will lead to their optimization and utilization in real-world applications. Synchrotron-based structural measurements over a broad range of temperatures and pressures are being conducted.  Detailed studies have revealed new space group symmetries. Structural and thermodynamic properties are  related using experimental measurements. The results may help address stability issues in these materials and also provide the structural details needed to develop accurate theoretical models deeded to predict optimized materials.