Fabrication process for stable and efficient perovskite solar cells

In a decade perovskite solar cells have achieved above 20% conversion efficiency and thus emerged as a suitable alternative to silicon solar cells. However, the main hindrance for the commercial utilization of these solar cells is low operational stability in ambient condition. Here perovskite solar cell of the architecture, FTO/m-TiO₂/CH₃NH₃PbI₃/P₃HT/Au has been fabricated and varied the fabrication parameters to study the impact on the cells' efficiency and their stability. Since the perovskite solar cell has a multilayer structure, the defects in any layer would affect its efficiency and stability. Therefore, it is essential to study each layer to get efficient solar cell with high stability. For this purpose, we have studied the effect of thickness of m-TiO₂ layer, perovskite formation time, thickness of hole transporting layer and gold contact, environment, light and packaging materials on efficiency and stability of the perovskite solar cell