Design and numerical simulation of highly efficient mixed-organic cation mixed-metal cation perovskite solar cells

摘要

Mixed cation perovskite type materials have recently shown considerable potential in high-efficiency single- and multi-junction solar cell devices. However, the operating principles of multiple cation-based perovskite solar cells are currently poorly understood. Furthermore, the photovoltaic performances of mixed cations-based perovskites solar cells are investigated using device simulator program. Inorganic TiO2 and Cu2O were used as electron transport layer and hole transport layer, respectively, because of their better performance. The impact of thickness, doping concentration and density of defect is examined using on the device performance. In addition, the effect of band offsets on performance was also investigated through altering the electron affinity of interface layers. Our calculated results reveal that a 700 nm absorber thickness is appropriate for a good solar cell device. Furthermore, impressive cell efficiency findings were obtained by adjusting defect density (10(15)-10(16) cm(-3)) of the mixed perovskite active layer. The optimum conduction and valence band offsets, respectively, were determined to be 0.1 to 0.4 eV and 0.1 to 0.1 eV, allowing for a good performance of mixed perovskite devices. As an alternative to typical halide perovskite solar cells, our findings can be utilized to design and construct efficient mixed cations perovskite solar cell devices.