ZnO nanowire embedded TiO film as an electrode for perovskite CsPbIBr solar cells

A comparative study was conducted to look into the impact of various electron transporting films on the performance of perovskite CsPbI 2 Br solar cells. The solar cells with ZnO nanowires embedded TiO 2 as an electrode outperformed those with pure TiO 2 or pure ZnO. The enhanced performance is ascribed to the synergetic effect of both TiO 2 /ZnO constituent properties. In particular, an appropriate amount of ZnO nanowires embedded in TiO 2 films could optimize the properties of the electron transporting layer by improving electron transport, light harvesting, and overall photovoltaic performance, leading to the power conversion efficiency as high as 10.53%. A comparative study was conducted to look into the impact of various electron transporting films on the performance of perovskite CsPbI 2 Br solar cells.