Preparation of high performance perovskite-sensitized nanoporous titanium dioxide photoanodes by in situ method for use in perovskite solar cells

Abstract

Perovskite-sensitized nanoporous TiO₂ photoanode of several micrometers thickness was prepared for the first time by an in situ technique. The excellent contact between the TiO₂ and perovskite could be beneficial to the separation and transmission of the electron and hole while the sufficient filling and abundant CH₃NH₃PbI₃ could enhance the absorption and utilization of sunlight to finally obtain an efficient perovskite solar cell. Note that 10.03% of cell efficiency was achieved without adding hole transporting material into the device.