Electrospun lead-doped titanium dioxide nanofibers and the in situ preparation of perovskite-sensitized photoanodes for use in high performance perovskite solar cells

Lead-doped TiO2 nanofibers (TNFs) are fabricated by using an electrospun method, followed by the in situ preparation of perovskitesensitized photoanode for use in perovskite solar cells (PSC). The electrospun TNFs can provide direct pathways for the rapid collection and transmission of photogenerated electrons. The photoanode based on the in situ method shows not only excellent contacting between the TNF and perovskite, but also abundant perovskite filling in it. These can be conducive not only to the separation and transmission of the electron and hole, but also to the absorption and utilization of sunlight. Finally, a high performance PSC with the cell efficiency of 9.03% is obtained without any hole transporting materials.