LAUSR

The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has been up to 25.5%. Thus, they have shown great potential for commercial applications. Therefore, simplifying technological process and reducing production cost have been widely concerned by scientific and industrial communities. In this study, we prepared PSCs with the simplest device architecture (FTO/MAPbI3/Carbon). High-quality perovskite film with low interface defects and good carrier transport property was obtained by tuning p-n property, matching energy level, and enhancing carrier collection and transport. The PCE of 12.01% is achieved, which is the best one compared with that obtained by same device structure in previous reports. The device has also shown excellent long-term stability due to the elimination of charge transport layers and the usage of hydrophobic materials. This study provides a new approach to reduce production cost and simplify production process of PSCs.