| 초록 |
In the past few years, carbon-based perovskite solar cells (PSCs) have been received tremendous attentions by their remarkable long-term stability and low-cost of material and fabrication process. However, reduced charge transport capability due to the poor interfacial contact between perovskite and carbon should be solved to fabricate a highly efficient carbon-based device. Herein we introduce an effective method for post-growth of two-dimensional (2D) perovskite layer at the interface between 3D perovskite layer and carbon-electrode. 2D perovskite layer formed within perovskite/carbon interfaces improves the poor contact of carbon-electrode and obtains optimized energy band alignment. The carbon electrode-based PSCs made with 2D perovskite layer exhibited excellent photovoltaic performances, achieving efficiency over 15%. Furthermore, the devices show superior thermal and air stability due to dual protection of 2D perovskite and carbon layer. |
