In the last few years, perovskite solar cells have attracted enormous interest in the photovoltaic community due to their low cost of materials, tunable band gap, excellent photovoltaic properties and easy process ability at low temperature. In this work, we fabricated hole-conductorfree carbon-based perovskite solar cells with the monolithic structure: glass/FTO/bl-TiO2/(mpTiO2/mp-ZrO2/mp-carbon) perovskite. The mixed 2D/3D perovskite precursor solution composed of PbI2, methylammonium iodide (MAI), and 5-ammoniumvaleric acid iodide (5-AVAI) was dropcasted through triple mesoporous TiO2/ZrO2/carbon electrode films. | Using solvent vapor annealing for the enhancement of the stability and efficiency of monolithic hole-conductor-free Perovskite solar cells
