Investigation of Mechanical Properties of Ruddlesden-Popper 2D,2D-3D and 3D Perovskites Using an Experimental and First Principles Approach

Hybrid organic-inorganic perovskites (HOIPs) are considered as one of the most promising candidates for the photovoltaic application.Although a lot of research has been done for the improvement in efficiency and stability of the devices made from this material, the mechanical property study of these materials is very limited.The mechanical properties of hybrid organicinorganic perovskites crystals have been mentioned in a few reports.However, it is also important to study the mechanical properties of the perovskite's thin films, especially those used in flexible devices, since their polycrystalline nature makes them different from single crystals.The stiffness of the perovskite active layer plays a critical role in influencing the flexibility of a solar cell.This is one of the important parameters which must be considered